GEOMAR  Sommer, Stefan

Dr. rer. nat. Stefan Sommer (PhD)

Stefan Sommer

Senior Scientist, benthic biogeochemistry, deep-sea technology (Lander/Rover)
Topic 6

RD2: Marine Biogeochemistry
RU: Marine Geosystems

office: 8E/104, phone (office): +49 431 600-2119

E-mail: ssommer(at)geomar.de

Contact

Address: GEOMAR Helmholtz Centre For Ocean Research Kiel, Wischhofstr. 1-3, 24148 Kiel, Germany
 

Research Focus

  • Benthic carbon cycling in the deep-sea
  • Ecology and biogeochemistry of cold seep environments
  • Benthic-pelagic biogeochemical cycling of major elements in oxygen minimum zones
  • Eutrophication of coastal waters
  • Deep-sea technology (Lander & Rover for in situ flux measurements), in situ sensor technology
     

Projects

  • Research Cooperation with the Landesamt für Umwelt (Schleswig Holstein) to perform benthic nutrient flux measurements in the Schlei, May 2021 - April 2025 
  • DAM Pilotproject MGF-Baltic Sea-II „Exclusion of mobile ground touching fishery in marine protected areas of the Baltic Sea - phase II“(BMBF), March 2023 - February 2026
  • MUSE, Helmholtz Research Infrastructure Project „Marine Environmental Robotics and Sensor Technologies for sustainable Research and Management of Coastal, Ocean and Polar Regions“, January 2023 - December 2029
  • Helmholtz Sustainability Challenge, iFOODis (Improving the sustainability of food cycles through intelligent (robotic) systems – iFOODis), January 2023 - December 2027
     

Vita

since 1998 scientific employer at GEOMAR / IFM-GEOMAR / GEOMAR

1997 PhD in Marine Biology / Queen Mary and Westfield College, University of London, Scientific education Biology, Tübingen, London 

Prinicpal investigator of several research Expeditions on RV Meteor, RV Maria S. Merian, RV Poseidon, RV Alkor; participation in more than 40 research cruises
 

Publications (Highlights)

Sommer S., et al., (2017) Major bottom water ventilation events do not significantly reduce basin-wide benthic N and P release in the Eastern Gotland Basin (Baltic Sea). Front. Mar. Sci. 4:18.

Sommer S., et al., (2016) Depletion of oxygen, nitrate and nitrite in the Peruvian oxygen minimum zone cause an imbalance of benthic nitrogen fluxes. Deep-Sea Res., 112, 113-122.

Geilert, S., et al., (2022) Coastal El Nino triggers rapid marine silicate alteration on the seafloor. Nature Comm., 14:1676

Fuhr M, et al., (2024) Alkaline mineral addition to anoxic to hypoxic Baltic Sea sediments as a potentially efficient CO2-removal technique. Front. Clim. 6, 1338556

Fuhr, M, et al. (2023) Disentangling artificial and natural benthic weathering in organic rich Baltic Sea sediments. Front. Clim., 5, 1245580.
 

Publications (OceanRep)

Jump to: Articles in a Scientific Journal - peer-reviewed | Articles in a Scientific Journal - without review | Book chapters | Conference papers | Presentations | Conference posters | Conference pico | Reports - Cruise Reports | Reports - Short Cruise Reports | Reports - Weekly reports
Number of items: 215.

Articles in a Scientific Journal - peer-reviewed

[thumbnail of s43247-025-02079-6.pdf]

Fuhr, M., Dale, A. W. , Wallmann, K. , Bährle, R. J., Kalapurakkal, H. T., Sommer, S., Spiegel, T. , Dobashi, R., Buchholz, B., Schmidt, M. , Perner, M. and Geilert, S. (2025) Calcite is an efficient and low-cost material to enhance benthic weathering in shelf sediments of the Baltic Sea. Open Access Communications Earth & Environment, 8 . Art.Nr. 106 (2025). DOI 10.1038/s43247-025-02079-6.

[thumbnail of fmars-11-1331102.pdf] [thumbnail of Data Sheet 1-2.docx]

Spiegel, T. , Diesing, M., Dale, A. W. , Lenz, N. , Schmidt, M. , Sommer, S., Böttner, C., Fuhr, M., Kalapurakkal, H. T., Schulze, C. S. and Wallmann, K. (2024) Modelling mass accumulation rates and 210Pb rain rates in the Skagerrak: lateral sediment transport dominates the sediment input. Open Access Frontiers in Marine Science, 11 . Art.Nr. 1331102. DOI 10.3389/fmars.2024.1331102.

[thumbnail of fclim-06-1338556.pdf] [thumbnail of Data Sheet 1-2.pdf]

Fuhr, M., Wallmann, K. , Dale, A. W. , Kalapurakkal, H. T., Schmidt, M. , Sommer, S., Deusner, C. , Spiegel, T. , Kowalski, J. and Geilert, S. (2024) Alkaline mineral addition to anoxic to hypoxic Baltic Sea sediments as a potentially efficient CO2-removal technique. Open Access Frontiers in Climate, 6 . Art.Nr. 1338556. DOI 10.3389/fclim.2024.1338556.

[thumbnail of Bam et al 2023 Peru.pdf]

Bam, W., Gasser, B., Maiti, K., Levy, I., Miquel, J. C., Hansman, R. L., Scholten, J., Xie, R. C. , Sommer, S., Kiko, R. and Swarzenski, P. W. (2023) Particulate organic carbon export fluxes estimates by 234Th238U disequilibrium in the oxygen minimum zone off the Peruvian coast. Marine Chemistry, 257 . Art.Nr. 104325. DOI 10.1016/j.marchem.2023.104325.

[thumbnail of fclim-05-1245580.pdf] [thumbnail of Data Sheet 1.docx]

Fuhr, M., Wallmann, K. , Dale, A. W. , Diercks, I., Kalapurakkal, H. T., Schmidt, M. , Sommer, S., Böhnke, S., Perner, M. and Geilert, S. (2023) Disentangling artificial and natural benthic weathering in organic rich Baltic Sea sediments. Open Access Frontiers in Climate, 5 . Art.Nr. 1245580. DOI 10.3389/fclim.2023.1245580.

[thumbnail of s41467-023-37186-5.pdf] [thumbnail of 41467_2023_37186_MOESM1_ESM.pdf]

Geilert, S. , Frick, D. A., Garbe-Schönberg, D., Scholz, F. , Sommer, S., Grasse, P. , Vogt, C. and Dale, A. W. (2023) Coastal El Niño triggers rapid marine silicate alteration on the seafloor. Open Access Nature Communications, 14 . Art.Nr. 1676. DOI 10.1038/s41467-023-37186-5.

[thumbnail of fmars-10-1141448.pdf] [thumbnail of Supplementary material]

Spiegel, T. , Dale, A. W. , Lenz, N. , Schmidt, M. , Sommer, S., Kalapurakkal, H. T., Przibilla, A., Lindhorst, S. and Wallmann, K. (2023) Biogenic silica cycling in the Skagerrak. Open Access Frontiers in Marine Science, 10 . Art.Nr. 1141448. DOI 10.3389/fmars.2023.1141448.

[thumbnail of fmars-09-902062.pdf] [thumbnail of Data Sheet 1.PDF]

Dale, A. W. , Clemens, D. , Dähnke, K., Korth, F. , Wankel, S. D., Schroller-Lomnitz, U., Wallmann, K. and Sommer, S. (2022) Nitrogen cycling in sediments on the NW African margin inferred from N and O isotopes in benthic chambers. Open Access Frontiers in Marine Science, 9 . Art.Nr. 902062. DOI 10.3389/fmars.2022.902062.

Chuang, P. C., Anderson, C. H., Kossack, M., Fabian, J., Su, C. C., Vosteen, P., Zabel, M., Scholz, F., Schulz-Vogt, H. N., Sommer, S. and Dale, A. W. (2022) Nutrient turnover by large sulfur bacteria on the Namibian mud belt during the low productivity season. Open Access Frontiers in Marine Science, 9 . Art.Nr. 929913. DOI 10.3389/fmars.2022.929913.

[thumbnail of fmars-09-999902.pdf] [thumbnail of Data Sheet 1.PDF]

Melaniuk, K., Sztybor, K., Treude, T., Sommer, S., Zajaczkowski, M. and Rasmussen, T. L. (2022) Response of benthic foraminifera to environmental successions of cold seeps from Vestnesa Ridge, Svalbard: Implications for interpretations of paleo-seepage environments. Open Access Frontiers in Marine Science, 9 . Art.Nr. 999902. DOI 10.3389/fmars.2022.999902.

[thumbnail of 1-s2.0-S1364032122005627-main-1.pdf]

Connelly, D. P., Bull, J. M., Flohr, A., Schaap, A., Koopmans, D., Blackford, J. C., White, P. R., James, R. H., Pearce, C., Lichtschlag, A., Achterberg, E. P. , de Beer, D., Roche, B., Li, J., Saw, K., Alendal, G., Avlesen, H., Brown, R., Borisov, S. M., Böttner, C. , Cazenave, P. W., Chen, B., Dale, A. W. , Dean, M., Dewar, M., Esposito, M., Gros, J. , Hanz, R., Haeckel, M. , Hosking, B., Huvenne, V., Karstens, J. , Le Bas, T., Leighton, T. G., Linke, P. , Loucaides, S., Matter, J. M., Monk, S., Mowlem, M. C., Oleynik, A., Omar, A. M., Peel, K., Provenzano, G., Saleem, U., Schmidt, M. , Schramm, B., Sommer, S., Strong, J., Falcon Suarez, I., Ungerboeck, B., Widdicombe, S., Wright, H. and Yakushev, E. (2022) Assuring the integrity of offshore carbon dioxide storage. Open Access Renewable and Sustainable Energy Reviews, 166 . Art.Nr. 112670. DOI 10.1016/j.rser.2022.112670.

[thumbnail of 09376599.pdf] [thumbnail of IEEEInternetComputingDigitalTwins2021arXiv.pdf]

Barbie, A., Pech, N., Hasselbring, W., Flögel, S., Wenzhoefer, F., Walter, M., Shchekinova, E., Busse, M., Türk, M., Hofbauer, M. and Sommer, S. (2022) Developing an Underwater Network of Ocean Observation Systems with Digital Twin Prototypes - A Field Report from the Baltic Sea. Open Access IEEE Internet Computing, 26 (3). pp. 33-42. DOI 10.1109/MIC.2021.3065245.

[thumbnail of s41598-022-05175-1.pdf] [thumbnail of 41598_2022_5175_MOESM1_ESM.docx]

Melaniuk, K., Sztybor, K., Treude, T., Sommer, S. and Rasmussen, T. L. (2022) Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N. Open Access Scientific Reports, 12 . Art.Nr. 1169. DOI 10.1038/s41598-022-05175-1.

[thumbnail of 1-s2.0-S1750583621002620-main.pdf] [thumbnail of 1-s2.0-S1750583621002620-mmc1.pdf]

Lichtschlag, A., Pearce, C. R., Suominen, M., Blackford, J., Borisov, S. M., Bull, J. M., de Beer, D., Dean, M., Esposito, M., Flohr, A., Gros, J. , Haeckel, M. , Huvenne, V. A. I., James, R. H., Koopmans, D., Linke, P. , Mowlem, M., Omar, A. M., Schaap, A., Schmidt, M. , Sommer, S., Strong, J. and Connelly, D. P. (2021) Suitability analysis and revised strategies for marine environmental carbon capture and storage (CCS) monitoring. Open Access International Journal of Greenhouse Gas Control, 112 . Art.Nr. 103510. DOI 10.1016/j.ijggc.2021.103510.

[thumbnail of fmars-08-723304.pdf] [thumbnail of Data_Sheet_1_Climate-Biogeochemistry Interactions in the Tropical Ocean Data Collection and Legacy.pdf]

Krahmann, G. , Arevalo-Martinez, D. L. , Dale, A. W. , Dengler, M. , Engel, A. , Glock, N., Grasse, P. , Hahn, J. , Hauss, H. , Hopwood, M. J. , Kiko, R. , Loginova, A. N. , Löscher, C. R. , Maßmig, M., Roy, A. S., Salvatteci, R., Sommer, S., Tanhua, T. and Mehrtens, H. (2021) Climate-Biogeochemistry Interactions in the Tropical Ocean: Data collection and legacy. Open Access Frontiers in Marine Science, 8 . Art.Nr. 723304. DOI 10.3389/fmars.2021.723304.

[thumbnail of 1-s2.0-S1750583621001390-main.pdf] [thumbnail of 1-s2.0-S1750583621001390-mmc1.pdf]

Gros, J. , Schmidt, M. , Linke, P. , Dötsch, S., Triest, J., Martinez-Cabanas, M., Esposito, M., Dale, A. W. , Sommer, S., Flohr, A., Fone, J., Bull, J. M., Roche, B., Strong, J. A., Saw, K., Brown, R., Koopmans, D. and Wallmann, K. (2021) Quantification of dissolved CO2 plumes at the Goldeneye CO2-release experiment. Open Access International Journal of Greenhouse Gas Control, 109 . Art.Nr. 103387. DOI 10.1016/j.ijggc.2021.103387.

[thumbnail of lno.11779.pdf] [thumbnail of lno.11779.pdf]

Treude, T. , Hamdan, L. J., Lemieux, S., Dale, A. W. and Sommer, S. (2021) Rapid sulfur cycling in sediments from the Peruvian oxygen minimum zone featuring simultaneous sulfate reduction and sulfide oxidation. Open Access Limnology and Oceanography, 66 (7). pp. 2661-2671. DOI 10.1002/lno.11779.

[thumbnail of Dale et al 2021 IJGGC.pdf]

Dale, A. W. , Sommer, S., Lichtschlag, A., Koopmans, D., Haeckel, M. , Kossel, E. , Deusner, C. , Linke, P. , Scholten, J., Wallmann, K. , van Erk, M. R., Gros, J. , Scholz, F. and Schmidt, M. (2021) Defining a biogeochemical baseline for sediments at Carbon Capture and Storage (CCS) sites: An example from the North Sea (Goldeneye). International Journal of Greenhouse Gas Control, 106 . Art.Nr. 103265. DOI 10.1016/j.ijggc.2021.103265.

[thumbnail of 1-s2.0-S1750583620306629-main.pdf]

Flohr, A., Schaap, A., Achterberg, E. P. , Alendal, G., Arundell, M., Berndt, C. , Blackford, J., Böttner, C. , Borisov, S. M., Brown, R., Bull, J. M., Carter, L., Chen, B., Dale, A. W. , de Beer, D., Dean, M., Deusner, C. , Dewar, M., Durden, J. M., Elsen, S., Esposito, M., Faggetter, M., Fischer, J. P., Gana, M., Gros, J. , Haeckel, M. , Hanz, R., Holtappels, M., Hosking, B., Huvenne, V. A. I., James, R. H., Koopmans, D., Kossel, E. , Leighton, T. G., Li, J., Lichtschlag, A., Linke, P. , Loucaides, S., Martinez-Cabanas, M., Matter, J. M., Mesher, T., Monk, S., Mowlem, M., Oleynik, A., Papadimitriou, S., Paxton, D., Pearce, C. R., Peel, K., Roche, B., Ruhl, H. A., Saleem, U., Sands, C., Saw, K., Schmidt, M. , Sommer, S., Strong, J. A., Triest, J., Ungerböck, B., Walk, J., White, P., Widdicombe, S., Wilson, R. E., Wright, H., Wyatt, J. and Connelly, D. (2021) Towards improved monitoring of offshore carbon storage: A real-world field experiment detecting a controlled sub-seafloor CO2 release. Open Access International Journal of Greenhouse Gas Control, 106 . Art.Nr. 103237. DOI 10.1016/j.ijggc.2020.103237.

[thumbnail of Accepted article] [thumbnail of 2020GB006583.pdf]

Dale, A. W. , Paul, M., Clemens, D. , Scholz, F., Schroller-Lomnitz, U., Wallmann, K. , Geilert, S. , Hensen, C. , Plass, A., Liebetrau, V., Grasse, P. and Sommer, S. (2021) Recycling and burial of biogenic silica in an open margin oxygen minimum zone. Open Access Global Biogeochemical Cycles, 35 (2). e2020GB006583. DOI 10.1029/2020GB006583.

[thumbnail of os-16-1347-2020.pdf]

Lüdke, J. , Dengler, M. , Sommer, S., Clemens, D. , Thomsen, S. , Krahmann, G. , Dale, A. W. , Achterberg, E. P. and Visbeck, M. (2020) Influence of intraseasonal eastern boundary circulation variability on hydrography and biogeochemistry off Peru. Open Access Ocean Science, 16 . pp. 1347-1366. DOI 10.5194/os-16-1347-2020.

[thumbnail of bg-17-4663-2020.pdf] [thumbnail of bg-2019-489-supplement.pdf]

Loginova, A. N. , Dale, A. W. , Le Moigne, F. A. C. , Thomsen, S. , Sommer, S., Wallmann, K. and Engel, A. (2020) Sediment release of dissolved organic matter to the oxygen minimum zone off Peru. Open Access Biogeosciences (BG), 17 . pp. 4663-4679. DOI 10.5194/bg-17-4663-2020.

[thumbnail of bg-17-3685-2020.pdf] [thumbnail of bg-17-3685-2020-supplement.pdf]

Plass, A., Schlosser, C. , Sommer, S., Dale, A. W. , Achterberg, E. P. and Scholz, F. (2020) The control of hydrogen sulfide on benthic iron and cadmium fluxes in the oxygen minimum zone off Peru. Open Access Biogeosciences (BG), 17 . pp. 3685-3704. DOI 10.5194/bg-17-3685-2020.

Gros, J. , Schmidt, M. , Dale, A. W. , Linke, P. , Vielstädte, L., Bigalke, N., Haeckel, M. , Wallmann, K. and Sommer, S. (2019) Simulating and Quantifying Multiple Natural Subsea CO2 Seeps at Panarea Island (Aeolian Islands, Italy) as a Proxy for Potential Leakage from Subseabed Carbon Storage Sites. Open Access Environmental Science & Technology, 53 (17). pp. 10258-10268. DOI 10.1021/acs.est.9b02131.

[thumbnail of 1-s2.0-S1750583618304857-main.pdf] [thumbnail of 1-s2.0-S1750583618304857-mmc1.docx]

Vielstädte, L., Linke, P. , Schmidt, M. , Sommer, S., Haeckel, M. , Braack, M. and Wallmann, K. (2019) Footprint and detectability of a well leaking CO2 in the Central North Sea: Implications from a field experiment and numerical modelling. Open Access International Journal of Greenhouse Gas Control, 84 . pp. 190-203. DOI 10.1016/j.ijggc.2019.03.012.

[thumbnail of Nilsson.pdf]

Nilsson, M. M., Kononets, M., Ekeroth, N., Viktorsson, L., Hylen, A., Sommer, S., Pfannkuche, O., Almroth-Rosell, E., Atamanchuk, D., Andersson, J. H., Roos, P., Tengberg, A. and Hall, P. O. J. (2019) Organic carbon recycling in Baltic Sea sediments – An integrated estimate on the system scale based on in situ measurements. Marine Chemistry, 209 . pp. 81-93. DOI 10.1016/j.marchem.2018.11.004.

[thumbnail of 2860.full.pdf]

Glock, N., Roy, A. S., Romero, D., Wein, T., Weissenbach, J., Revsbech, N. P., Høgslund, S., Clemens, D. , Sommer, S. and Dagan, T. (2019) Metabolic preference of nitrate over oxygen as an electron acceptor in foraminifera from the Peruvian oxygen minimum zone. Open Access PNAS Proceedings of the National Academy of Sciences of the United States of America, 116 (8). pp. 2860-2865. DOI 10.1073/pnas.1813887116.

[thumbnail of 10.1016_j.gca.2018.10.025.pdf] [thumbnail of Dale_Supplementary Information.pdf]

Dale, A. W. , Bourbonnais, A., Altabet, M., Wallmann, K. and Sommer, S. (2019) Isotopic fingerprints of benthic nitrogen cycling in the Peruvian oxygen minimum zone. Geochimica et Cosmochimica Acta, 245 . pp. 406-425. DOI 10.1016/j.gca.2018.10.025.

[thumbnail of Author's accepted manuscript] [thumbnail of Schroller-Lomnitz.pdf]

Schroller-Lomnitz, U., Hensen, C. , Dale, A. W. , Scholz, F., Clemens, D. , Sommer, S., Noffke, A. and Wallmann, K. (2019) Dissolved benthic phosphate, iron and carbon fluxes in the Mauritanian upwelling system and implications for ongoing deoxygenation. Open Access Deep Sea Research Part I: Oceanographic Research Papers, 143 . pp. 70-84. DOI 10.1016/j.dsr.2018.11.008.

Scholz, F., Baum, M., Siebert, C., Eroglu, S., Dale, A. W. , Naumann, M. and Sommer, S. (2018) Sedimentary molybdenum cycling in the aftermath of seawater inflow to the intermittently euxinic Gotland Deep, Central Baltic Sea. Open Access Chemical Geology, 491 . pp. 27-38. DOI 10.1016/j.chemgeo.2018.04.031.

[thumbnail of fmars-04-00390.pdf]

Gier, J., Löscher, C., Dale, A. W. , Sommer, S., Lomnitz, U. and Treude, T. (2017) Benthic Dinitrogen Fixation Traversing the Oxygen Minimum Zone Off Mauritania (NW Africa). Open Access Frontiers in Marine Science, 4 (390). DOI 10.3389/fmars.2017.00390.

[thumbnail of fmars-04-00027.pdf] [thumbnail of fmars-04-00027_image 1.pdf]

Hall, P. O. J., Almroth Rosell, E., Bonaglia, S., Dale, A. W., Hylén, A., Kononets, M., Nilsson, M., Sommer, S., van de Velde, S. and Viktorsson, L. (2017) Influence of Natural Oxygenation of Baltic Proper Deep Water on Benthic Recycling and Removal of Phosphorus, Nitrogen, Silicon and Carbon. Open Access Frontiers in Marine Science, 4 (27). DOI 10.3389/fmars.2017.00027.

[thumbnail of fmicb-08-00169.pdf]

Yücel, M., Sommer, S., Dale, A. W. and Pfannkuche, O. (2017) Microbial Sulfide Filter along a Benthic Redox Gradient in the Eastern Gotland Basin, Baltic Sea. Open Access Frontiers in Microbiology, 8 (169). DOI 10.3389/fmicb.2017.00169.

[thumbnail of fmars-04-00018.pdf]

Sommer, S., Clemens, D. , Yücel, M., Pfannkuche, O., Hall, P. O. J., Almroth-Rosell, E., Schulz-Vogt, H. N. and Dale, A. W. (2017) Major Bottom Water Ventilation Events Do Not Significantly Reduce Basin-Wide Benthic N and P Release in the Eastern Gotland Basin (Baltic Sea). Open Access Frontiers in Marine Science, 4 (18). DOI 10.3389/fmars.2017.00018.

[thumbnail of Steinle.pdf]

Steinle, L., Schmidt, M. , Bryant, L. D., Haeckel, M. , Linke, P. , Sommer, S., Zopfi, J., Lehmann, M. F., Treude, T. and Niemann, H. (2016) Linked sediment and water-column methanotrophy at a man-made gas blowout in the North Sea: Implications for methane budgeting in seasonally stratified shallow seas. Open Access Limnology and Oceanography, 61 (S1). S367-S386. DOI 10.1002/lno.10388.

[thumbnail of Ehlert.pdf] [thumbnail of Ehlert_Supp.pdf]

Ehlert, C., Doering, K., Wallmann, K. , Scholz, F., Sommer, S., Grasse, P. , Geilert, S. and Frank, M. (2016) Stable silicon isotope signatures of marine pore waters – Biogenic opal dissolution versus authigenic clay mineral formation. Geochimica et Cosmochimica Acta, 191 . pp. 102-117. DOI 10.1016/j.gca.2016.07.022.

[thumbnail of Scholz.pdf] [thumbnail of Scholz_Supp.pdf]

Scholz, F., Löscher, C. R., Fiskal, A., Sommer, S., Hensen, C. , Lomnitz, U., Wuttig, K., Göttlicher, J., Kossel, E. , Steininger, R. and Canfield, D. E. (2016) Nitrate-dependent iron oxidation limits iron transport in anoxic ocean regions. Earth and Planetary Science Letters, 454 . pp. 272-281. DOI 10.1016/j.epsl.2016.09.025.

[thumbnail of bg-13-4065-2016.pdf]

Gier, J., Sommer, S., Löscher, C. R., Dale, A. W. , Schmitz-Streit, R. and Treude, T. (2016) Nitrogen fixation in sediments along a depth transect through the Peruvian oxygen minimum zone. Open Access Biogeosciences (BG), 13 . pp. 4065-4080. DOI 10.5194/bg-13-4065-2016.

Dale, A. W. , Sommer, S., Lomnitz, U., Bourbonnais, A. and Wallmann, K. (2016) Biological nitrate transport in sediments on the Peruvian margin mitigates benthic sulfide emissions and drives pelagic N loss during stagnation events. Open Access Deep Sea Research Part I: Oceanographic Research Papers, 112 . pp. 123-136. DOI 10.1016/j.dsr.2016.02.013.

[thumbnail of Sokoll.pdf]

Sokoll, S., Lavik, G., Sommer, S., Goldhammer, T., Kuypers, M. M. M. and Holtappels, M. (2016) Extensive nitrogen loss from permeable sediments off North-West Africa. Open Access Journal of Geophysical Research: Biogeosciences, 121 (4). pp. 1144-1157. DOI 10.1002/2015JG003298.

[thumbnail of Erdem et.al..pdf] [thumbnail of mmc1.doc]

Erdem, Z., Schönfeld, J., Glock, N., Dengler, M. , Mosch, T., Sommer, S., Elger, J. and Eisenhauer, A. (2016) Peruvian sediments as recorders of an evolving hiatus for the last 22 thousand years. Quaternary Science Reviews, 137 . pp. 1-14. DOI 10.1016/j.quascirev.2016.01.029.

[thumbnail of bg-13-1609-2016.pdf] [thumbnail of Supplement]

Rovelli, L., Dengler, M. , Schmidt, M. , Sommer, S., Linke, P. and McGinnis, D. (2016) Thermocline mixing and vertical oxygen fluxes in the stratified central North Sea. Open Access Biogeosciences (BG), 13 (5). pp. 1609-1620. DOI 10.5194/bg-13-1609-2016.

[thumbnail of Sommer.pdf] [thumbnail of Sommer.pdf]

Sommer, S., Gier, J., Treude, T. , Lomnitz, U., Dengler, M. , Cardich, J. and Dale, A. W. (2016) Depletion of oxygen, nitrate and nitrite in the Peruvian oxygen minimum zone cause an imbalance of benthic nitrogen fluxes. Open Access Deep Sea Research Part I: Oceanographic Research Papers, 112 . pp. 113-122. DOI 10.1016/j.dsr.2016.03.001.

[thumbnail of bg-13-1367-2016.pdf] [thumbnail of Supplement]

Lomnitz, U., Sommer, S., Dale, A. W. , Löscher, C. R., Noffke, A., Wallmann, K. and Hensen, C. (2016) Benthic phosphorus cycling in the Peruvian oxygen minimum zone. Open Access Biogeosciences (BG), 13 (5). pp. 1367-1386. DOI 10.5194/bg-13-1367-2016.

[thumbnail of bg-13-283-2016.pdf]

Maltby, J., Sommer, S., Dale, A. W. and Treude, T. (2016) Microbial methanogenesis in the sulfate-reducing zone of surface sediments traversing the Peruvian margin. Open Access Biogeosciences (BG), 13 (1). pp. 283-299. DOI 10.5194/bg-13-283-2016.

[thumbnail of Sommer et al 2015.pdf] [thumbnail of 3D CH4 distribution at the blow out site.. ]

Sommer, S., Schmidt, M. and Linke, P. (2015) Continuous inline mapping of a dissolved methane plume at a blowout site in the Central North Sea UK using a membrane inlet mass spectrometer – water column stratification impedes immediate methane release into the atmosphere. Open Access Marine and Petroleum Geology, 68 . pp. 766-775. DOI 10.1016/j.marpetgeo.2015.08.020.

[thumbnail of art_10.1007_s00227-015-2709-6.pdf]

Kiko, R. , Hauss, H. , Dengler, M. , Sommer, S. and Melzner, F. (2015) The squat lobster Pleuroncodes monodon tolerates anoxic "dead zone" conditions off Peru. Marine Biology, 162 (9). pp. 1913-1921. DOI 10.1007/s00227-015-2709-6.

[thumbnail of journal.pone.0132785.pdf]

Yücel, M., Beaton, A. D., Dengler, M. , Mowlem, M. C., Sohl, F. and Sommer, S. (2015) Nitrate and Nitrite Variability at the Seafloor of an Oxygen Minimum Zone Revealed by a Novel Microfluidic In-Situ Chemical Sensor. Open Access PLoS ONE, 10 (7). e0132785. DOI 10.1371/journal.pone.0132785.

[thumbnail of Steinle_ngeo2420(1).pdf]

Steinle, L., Graves, C. A., Treude, T. , Ferré, B., Biastoch, A. , Bussmann, I., Berndt, C. , Krastel, S., James, R. H., Behrens, E., Böning, C. W. , Greinert, J. , Sapart, C. J., Scheinert, M. , Sommer, S., Lehmann, A. F. and Niemann, H. (2015) Water column methanotrophy controlled by a rapid oceanographic switch. Nature Geoscience, 8 (5). pp. 378-382. DOI 10.1038/ngeo2420.

[thumbnail of Supplement] [thumbnail of bg-12-1537-2015.pdf]

Dale, A. W. , Sommer, S., Lomnitz, U., Montes, I., Treude, T. , Liebetrau, V., Gier, J., Hensen, C. , Dengler, M. , Stolpovsky, K., Bryant, L. D. and Wallmann, K. (2015) Organic carbon production, mineralization and preservation on the Peruvian margin. Open Access Biogeosciences (BG), 12 . pp. 1537-1559. DOI 10.5194/bg-12-1537-2015.

[thumbnail of Schmidt et al 2015 MTSJ 49 1.pdf]

Schmidt, M. , Linke, P. , Sommer, S., Esser, D. and Cherednichenko, S. (2015) Natural CO2 seeps offshore Panarea – A test site for subsea CO2 leak detection technology. Marine Technology Society Journal, 49 (1). pp. 19-30. DOI 10.4031/MTSJ.49.1.3.

[thumbnail of McGinnis et.al.pdf]

McGinnis, D., Sommer, S., Lorke, A., Glud, R. N. and Linke, P. (2014) Quantifying tidally-driven benthic oxygen exchange across permeable sediments: An aquatic eddy correlation study. Open Access Journal of Geophysical Research: Oceans, 119 (10). pp. 6918-6932. DOI 10.1002/2014JC010303.

[thumbnail of Dale et.al.pdf] [thumbnail of Google Earth file - Cruise]

Dale, A. W. , Sommer, S., Ryabenko, E., Noffke, A., Bohlen, L., Wallmann, K. , Stolpovsky, K., Greinert, J. and Pfannkuche, O. (2014) Benthic nitrogen fluxes and fractionation of nitrate in the Mauritanian oxygen minimum zone (Eastern Tropical North Atlantic). Geochimica et Cosmochimica Acta, 134 . pp. 234-256. DOI 10.1016/j.gca.2014.02.026.

[thumbnail of bg-11-1215-2014(1).pdf]

Friedrich, J., Janssen, F., Aleynik, D., Bange, H. W. , Boltacheva, N., Çagatay, M. N., Dale, A. W. , Etiope, G., Erdem, Z., Geraga, M., Gilli, A., Gomoiu, M. T., Hall, P. O. J., Hansson, D., He, Y., Holtappels, M., Kirf, M. K., Kononets, M., Konovalov, S., Lichtschlag, A., Livingstone, D. M., Marinaro, G., Mazlumyan, S., Naeher, S., North, R. P., Papatheodorou, G., Pfannkuche, O., Prien, R., Rehder, G., Schubert, C. J., Soltwedel, T., Sommer, S., Stahl, H., Stanev, E. V., Teaca, A., Tengberg, A., Waldmann, C., Wehrli, B. and Wenzhöfer, F. (2014) Investigating hypoxia in aquatic environments: diverse approaches to addressing a complex phenomenon. Open Access Biogeosciences (BG), 11 . pp. 1215-1259. DOI 10.5194/bg-11-1215-2014.

[thumbnail of Scholz.pdf]

Scholz, F. , McManus, J. and Sommer, S. (2013) The manganese and iron shuttle in a modern euxinic basin and implications for molybdenum cycling at euxinic ocean margins. Chemical Geology, 355 . pp. 56-68. DOI 10.1016/j.chemgeo.2013.07.006.

[thumbnail of Thurber et al 2013.pdf]

Thurber, A. R., Levin, L. A., Rowden, A. A., Sommer, S., Linke, P. and Kröger, K. (2013) Microbes, macrofauna, and methane: a novel seep community fueled by aerobic methanotrophy . Limnology and Oceanography, 58 (5). pp. 1640-1656. DOI 10.4319/lo.2013.58.5.1640.

[thumbnail of Glock_al_2013.pdf]

Glock, N., Schönfeld, J., Eisenhauer, A. , Hensen, C. , Mallon, J. and Sommer, S. (2013) The role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone. Open Access Biogeosciences (BG), 10 . pp. 4767-4783. DOI 10.5194/bg-10-4767-2013.

[thumbnail of bg-10-629-2013.pdf] [thumbnail of bg-10-629-2013-supplement.pdf]

Dale, A. W. , Bertics, V. J., Treude, T. , Sommer, S. and Wallmann, K. (2013) Modeling benthic–pelagic nutrient exchange processes and porewater distributions in a seasonally hypoxic sediment: evidence for massive phosphate release by Beggiatoa?. Open Access Biogeosciences (BG), 10 (2). pp. 629-651. DOI 10.5194/bg-10-629-2013.

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Mosch, T., Sommer, S., Dengler, M. , Noffke, A., Bohlen, L., Pfannkuche, O., Liebetrau, V. and Wallmann, K. J. G. (2012) Factors influencing the distribution of epibenthic megafauna across the Peruvian oxygen minimum zone. Deep Sea Research Part I: Oceanographic Research Papers, 68 . pp. 123-135. DOI 10.1016/j.dsr.2012.04.014.

[thumbnail of Noffke_et_al_2012.pdf]

Noffke, A., Hensen, C. , Sommer, S., Scholz, F., Bohlen, L., Mosch, T., Graco, M. and Wallmann, K. (2012) Benthic iron and phosphorus fluxes across the Peruvian oxigen minimum zone. Open Access Limnology and Oceanography, 57 (3). pp. 851-867. DOI 10.4319/lo.2012.57.3.0851.

[thumbnail of bg-9-5341-2012.pdf]

Soetaert, K., van Oevelen, D. and Sommer, S. (2012) Modelling the impact of Siboglinids on the biogeochemistry of the Captain Arutyunov mud volcano (Gulf of Cadiz). Open Access Biogeosciences (BG), 9 (12). pp. 5341-5352. DOI 10.5194/bg-9-5341-2012.

[thumbnail of Accepted manuscript] [thumbnail of Bohlen.pdf]

Bohlen, L., Dale, A. W. , Sommer, S., Mosch, T., Hensen, C. , Noffke, A., Scholz, F. and Wallmann, K. (2011) Benthic Nitrogen Cycling Traversing the Peruvian Oxygen Minimum Zone. Open Access Geochimica et Cosmochimica Acta, 75 (20). pp. 6094-6111. DOI 10.1016/j.gca.2011.08.010.

[thumbnail of DALE__ET__AL__2011.pdf]

Dale, A. W. , Sommer, S., Bohlen, L., Treude, T. , Bertics, V. J., Bange, H. W. , Pfannkuche, O., Schorp, T., Mattsdotter, M. E. K. and Wallmann, K. (2011) Rates and regulation of nitrogen cycling in seasonally hypoxic sediments during winter (Boknis Eck, SW Baltic Sea): Sensitivity to environmental variables. Estuarine, Coastal and Shelf Science, 95 . pp. 14-28. DOI 10.1016/j.ecss.2011.05.016.

[thumbnail of Glock_al_2011.pdf]

Glock, N., Eisenhauer, A. , Milker, Y., Liebetrau, V., Schönfeld, J., Mallon, J., Sommer, S. and Hensen, C. (2011) Environmental influences on the pore density of Bolivina spissa (Cushman). Journal of Foraminiferal Research, 41 (1). pp. 22-32. DOI 10.2113/gsjfr.41.1.22.

[thumbnail of 2011_McGinnis_etal_LOM.pdf] [thumbnail of Appendix]

McGinnis, D., Cherednichenko, S., Sommer, S., Berg, P., Rovelli, L., Schwarz, R., Glud, R. N. and Linke, P. (2011) Simple, robust eddy correlation amplifier for aquatic dissolved oxygen and hydrogen sulfide flux measurements. Limnology and Oceanography: Methods, 9 . pp. 340-347. DOI 10.4319/lom.2011.9.340.

[thumbnail of Dale.pdf]

Dale, A. W. , Sommer, S., Haeckel, M. , Wallmann, K. , Linke, P. , Wegener, G. and Pfannkuche, O. (2010) Pathways and regulation of carbon, sulfur and energy transfer in marine sediments overlying methane gas hydrates on the Opouawe Bank (New Zealand). Geochimica et Cosmochimica Acta, 74 . pp. 5763-5784. DOI 10.1016/j.gca.2010.06.038.

[thumbnail of Linke.pdf]

Linke, P. , Sommer, S., Rovelli, L. and McGinnis, D. (2010) Physical limitations of dissolved methane fluxes: The role of bottom layer processes. Marine Geology, 272 . pp. 209-222. DOI 10.1016/j.margeo.2009.03.020.

[thumbnail of Sommer.pdf]

Sommer, S., Linke, P. , Pfannkuche, O., Niemann, H. and Treude, T. (2010) Benthic respiration in a novel seep habitat dominated by dense beds of ampharetid polychaetes at the Hikurangi Margin (New Zealand). Marine Geology, 272 (1/4). pp. 223-232. DOI 10.1016/j.margeo.2009.06.003.

[thumbnail of 950_Sommer_2009_SeabedMethaneEmissionsAndThe_Artzeit_pubid12984.pdf]

Sommer, S., Linke, P. , Pfannkuche, O., Schleicher, T., Schneider, J., Reitz, A., Haeckel, M. , Flögel, S. and Hensen, C. (2009) Seabed methane emissions and the habitat of frenulate tubeworms on the Captain Arutyunov mud volcano (Gulf of Cadiz). Open Access Marine Ecology Progress Series, 382 . pp. 69-86. DOI 10.3354/meps07956.

[thumbnail of Sweetman.pdf]

Sweetman, A. K., Sommer, S., Pfannkuche, O. and Witte, U. (2009) Retarded response by macrofauna-size foraminifera to phytodetritus in a deep Norwegian Fjord. Journal of Foraminiferal Research, 39 . pp. 15-22. DOI 10.2113/gsjfr.39.1.15.

[thumbnail of 251_Nuzzo_2008_ShallowMicrobialRecyclingOfDeepsourced_Artzeit_pubid10058.pdf]

Nuzzo, M., Hornibrook, E. R. C., Hensen, C. , Schneider von Deimling, J. , Parkes, R. J., Rinna, J., Sommer, S., Magalhães, V. H., Reitz, A., Brückmann, W. and Pinheiro, L. M. (2008) Shallow microbial recycling of deep-sourced carbon in Gulf of Cadiz mud volcanoes. Geomicrobiology Journal, 25 (6). pp. 283-295. DOI 10.1080/01490450802258196.

[thumbnail of 0023.pdf]

Sommer, S., Türk, M., Kriwanek, S. and Pfannkuche, O. (2008) Gas exchange system for extended in situ benthic chamber flux measurements under controlled oxygen conditions: First application - Sea bed methane emission measurements at Captain Arutyunov mud volcano. Limnology and Oceanography: Methods, 6 . pp. 23-33. DOI 10.4319/lom.2008.6.23.

[thumbnail of m337p027.pdf]

Sommer, S., Gutzmann, E. and Pfannkuche, O. (2007) Sediments hosting gas hydrates - oases for metazoan meiofauna. Open Access Marine Ecology Progress Series, 337 . pp. 27-37. DOI 10.3354/meps337027.

[thumbnail of Sommer_et_al-2006-Global_Biogeochemical_Cycles.pdf]

Sommer, S., Pfannkuche, O., Linke, P. , Luff, R., Greinert, J. , Drews, M., Gubsch, S., Pieper, M., Poser, M. and Viergutz, T. (2006) Efficiency of benthic filter: Biological control of the emission of dissolved methane from sediments containing shallow gas hydrates at Hydrate Ridge. Open Access Global Biogeochemical Cycles, 20 (GB2019). DOI 10.1029/2004GB002389.

[thumbnail of 0007.pdf] [thumbnail of 0007a1.pdf]

Tengberg, A., Hovdenes, J., Andersson, H. J., Brocandel, O., Diaz, R., Hebert, D., Arnerich, T., Huber, C., Körtzinger, A. , Khripounoff, A., Rey, F., Rönning, C., Schimanski, J., Sommer, S. and Stangelmayer, A. (2006) Evaluation of a lifetime-based optode to measure oxygen in aquatic systems. Limnology and Oceanography: Methods, 4 . pp. 7-17. DOI 10.4319/lom.2006.4.7.

[thumbnail of m304p077.pdf]

Heinz, P., Sommer, S., Pfannkuche, O. and Hemleben, C. (2005) Living benthic foraminifera in sediments influenced by gas hydrates at the Cascadia convergent margin, NE Pacific. Open Access Marine Ecology Progress Series, 304 . pp. 77-89. DOI 10.3354/meps304077.

[thumbnail of Sommer et.al.pdf]

Sommer, S., Gutzmann, E., Ahlrichs, W. and Pfannkuche, O. (2003) Rotifers colonising sediments with shallow gas hydrates. Naturwissenschaften, 90 . pp. 273-276. DOI 10.1007/s00114-003-0423-6.

[thumbnail of nature01799.pdf]

Witte, U., Wenzhöfer, F., Sommer, S., Boetius, A., Heinz, P., Aberle, N., Sand, M., Cremer, A., Abraham, W. R., Jorgensen, B. B. and Pfannkuche, O. (2003) In situ experimental evidence of the fate of a phytodetritus pulse at the abyssal sea floor. Nature, 424 . pp. 763-765. DOI 10.1038/nature01799.

[thumbnail of m243p025.pdf]

Sommer, S., Pfannkuche, O., Rickert, D. and Kähler, A. (2002) Ecological implications of surficial marine gas hydrates for the associated small-sized benthic biota at the Hydrate Ridge (Cascadia Convergent Margin, NE Pacific). Open Access Marine Ecology Progress Series, 243 . pp. 25-38. DOI 10.3354/meps243025.

[thumbnail of 1-s2.0-S0967064500000503-main.pdf]

Pfannkuche, O., Sommer, S. and Kähler, A. (2000) Coupling between phytodetritus deposition and the small-sized benthic biota in the deep Arabian Sea: analysis of biogenic sediment compounds. Deep Sea Research Part II: Topical Studies in Oceanography, 47 (14). pp. 2805-2833. DOI 10.1016/S0967-0645(00)00050-3.

[thumbnail of 1-s2.0-S0967064500000540-main.pdf]

Sommer, S. and Pfannkuche, O. (2000) Metazoan meiofauna of the deep Arabian Sea: Standing stocks, size spectra and regional variability in relation to monsoon included enhanced sedimentation regimes of particulate organic matter. Deep Sea Research Part II: Topical Studies in Oceanography, 47 (14). pp. 2957-2977. DOI 10.1016/S0967-0645(00)00054-0.

Articles in a Scientific Journal - without review

[thumbnail of essd-2025-146.pdf]

Hylen, A., Ekeroth, N., Berk, H., Dale, A. W. , Kononets, M., Lenstra, W. K., Palo, A., Tengberg, A., van de Velde, S. J., Sommer, S., Slomp, C. P. and Hall, P. O. J. (Submitted) In situ-measured benthic fluxes of dissolved inorganic phosphorus in the Baltic Sea. Open Access Earth System Science Data . DOI 10.5194/essd-2025-146.

[thumbnail of Complete Volume]

Augustin, N. , Schmidt, M. , Devey, C. W. , Al-Aidaroos, A. M., Kürten, B., Eisenhauer, A. , Brückmann, W., Dengler, M. , van der Zwan, F. M. , Feldens, P., Kwasnitschka, T., Bantan, R. A., Basaham, A., Metz, D., Hagemann, J., Al-Dhouyan, I. O., Al-Farawati, R., Al-Haj, A., Al-Nomani, S., Al-Nuwairah, M., Al-Mehana, W., Al-Sofyani, A., Al-Yousef, S., Al-Barakati, A., Audritz, S., Bauersachs, T., Bruss, G., Elgarafi, A. E., El-Sherbini, M., Haredy, R., Hissmann, K., Jamal, M., Khomayis, H. S., Kotob, A., Laurila, T., Linke, P. , McGinnis, D., Orif, I. M., Pena-Garcia, D., Raddatz, J., Sas, A., Sawall, Y., Schauer, J., Sommer, S., Winder, M. and Walther, S. (2014) The Jeddah Transect Project: Extensive mapping of the Red Sea Rift. Open Access InterRidge News, 22 (November). pp. 68-73.

[thumbnail of Bohlen Sommer ifm-geomar-annual-report-2011-3.pdf]

Bohlen, L. and Sommer, S. (2012) Enhanced recycling of bioavailable nitrogen in sediments underlying the Peruvian oxygen minimum zone. Open Access IFM-GEOMAR Annual Report, 2011 . pp. 26-27.

Book chapters

[thumbnail of Cold-Seep Ökosysteme.pdf]

Sommer, S. and Linke, P. (2020) Cold-Seep-Ökosysteme - Oasen oder Leben am Limit. In: Tiefsee - Vielfalt in der Dunkelheit. , ed. by Müller, T. and Hoffmann-Wieck, G.. Senckenberg-Buch, 83 . Schweizerbart, Stuttgart, pp. 62-68. ISBN 978-3-510-61415-8

[thumbnail of 09235210.pdf]

Barbie, A., Hasselbring, W., Pech, N., Sommer, S., Flögel, S. and Wenzhofer, F. (2020) Prototyping Autonomous Robotic Networks on Different Layers of RAMI 4.0 with Digital Twins. In: IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI), Karlsruhe, Germany, 2020. . IEEE, Piscataway, NJ, pp. 1-6. ISBN 978-1-7281-6422-9 DOI 10.1109/MFI49285.2020.9235210.


Schmidt, M. , Sommer, S., Linke, P. , Cherednichenko, S., Bodenbinder, A. and Bryant, L. (2012) Water column and sediment gas geochemistry. Open Access In: RV Celtic Explorer EUROFLEETS cruise report CE12010 - ECO2@NorthSea : 20.07. – 06.08.2012, Bremerhaven - Hamburg. , ed. by Linke, P.. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, pp. 8-27. DOI 10.3289/GEOMAR_REP_NS_4_2012.


Vielstädte, L., Sommer, S., Schmidt, M. , Linke, P. and Haeckel, M. (2012) Gas release experiment. In: RV Celtic Explorer EUROFLEETS cruise report CE12010 - ECO2@NorthSea : 20.07. – 06.08.2012, Bremerhaven - Hamburg. , ed. by Linke, P.. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, pp. 28-32. DOI 10.3289/GEOMAR_REP_NS_4_2012.

Conference papers

[thumbnail of Wedler et.al.pdf]

Wedler, A., Wilde, M., Reill, J., Schuster, M. J., Vayugundlaa, M., Brunner, S. G., Bussmann, K., Dömel, A., Drauschke, M., Gmeiner, H., Lehner, H., Lehner, P., Müller, M. G., Stürzl, W., Triebel, R., Vodermayer, B., Börner, A., Krenn, R., Dammann, A., Fiebig, U. C., Staudinger, E., Wenzhöfer, F., Flögel, S., Sommer, S., Asfour, T., Flad, M., Hohmann, S., Brandauer, M. and Albu-Schäffer, A. O. (2018) From single autonomous robots toward cooperative robotic interactions for future planetary exploration missions. [Paper] In: 69. International Astronautical Congress (IAC). , 01.-05.10.2018, Bremen, Germany ; pp. 1-8 .

Presentations


Fuhr, M., Wallmann, K. J. G. , Schmidt, M. , Sommer, S., Deusner, C. , Kalapurakkal, H. T., Spiegel, T. and Geilert, S. (2024) Benthic dunite and calcite weathering as a method for ocean alkalinity enhancement. [Talk] In: Ocean Science Meeting 2024. , 18.-23.02.2024, New Orleans, USA .


Fuhr, M., Wallmann, K. J. G. , Dale, A. W. , Diercks, I., Kalapurakkal, H. T., Schmidt, M. , Sommer, S. and Geilert, S. (2023) Benthic dunite and calcite weathering as a method for ocean alkalinity enhancement. [Talk] In: EGU General Assembly 2023. , 24.-28.4.2023, Vienna, Austria .


Fuhr, M., Wallmann, K. J. G. , Dale, A. W. , Diercks, I., Kalapurakkal, H. T., Schmidt, M. , Sommer, S. and Geilert, S. (2023) Benthic weathering of dunite and calcite in the Baltic Sea – rocks!. [Talk] In: Rock Weathering Conference. , 05.2023, Delft, The Netherlands .

[thumbnail of Abstract]

Chuang, P. C., Anderson, C. H., Kossack, M., Fabian, J., Su, C. C., Vosteen, P., Zabel, M., Scholz, F., Schulz-Vogt, H. N., Sommer, S. and Dale, A. W. (2022) Nutrient turnover by large sulfur bacteria on the Namibian mud belt during the low productivity season. Open Access [Talk] In: Goldschmidt Conference 2022. , 10.07.-15.07.2022, Honolulu, Hawaii, USA . DOI 10.46427/gold2022.11984.


Zeller, M., Kallmeyer, J., Clemens, D. , Schönke, M., Feldens, P., Sommer, S. and Böttcher, M. E. (2021) Impact of bottom contact trawling on benthic biogeochemical cycling in the Southern Baltic Sea. [Talk] In: Goldschmidt Conference 2021. , 04.-09.07.2021, Online .


Gros, J. , Schmidt, M. , Dale, A. W. , Linke, P. , Vielstädte, L., Bigalke, N., Haeckel, M. , Wallmann, K. and Sommer, S. (2019) Simulating and Quantifying Panarea’s Multiple Offshore CO2 Seeps as a Natural Proxy for Potential Leakage from Sub-Seabed CO2 Storage Sites. [Talk] In: STEMM‐CCS Early Career Researcher Conference. , 04.-06.11.2019, Winchester, UK .

[thumbnail of EGU2019-18835-1.pdf]

Loginova, A. N. , Dale, A. W. , Le Moigne, F. A. C. , Thomsen, S. , Sommer, S., Wallmann, K. J. G. and Engel, A. (2019) Sediment release of dissolved organic matter in the oxygen minimum zone off Peru. Open Access [Talk] In: EGU General Assembly 2019. , 08.-13.04.2019, Vienna, Austria . Geophysical Research Abstracts, 21 (EGU2019-18835-1, 2019).


Clemens, D. , Lüdke, J. , Dengler, M. , Dale, A. W. , Wallmann, K. and Sommer, S. (2018) Benthic N-cycling in the Peruvian Oxygen Minimum Zone in relation to variable bottom water redox conditions. [Talk] In: Ocean Deoxygenation Conference. , 03.09.-07.09.2018, Kiel, Germany .


Dale, A. W. , Bourbonnais, A., Altabet, M., Wallmann, K. and Sommer, S. (2018) Big bacteria in sediments on the Peruvian margin and their impact on ocean deoxygenation. [Talk] In: Ocean - Climate - Sustainability: Research Frontiers. , 22.10.-23.10.2018, Berlin, Germany .


Dale, A. W. , Bourbonnais, A., Altabet, M., Wallmann, K. and Sommer, S. (2018) Isotopic fingerprints of benthic nitrogen cycling in the Peruvian oxygen minimum zone. [Talk] In: Ocean Deoxygenation Conference. , 03.09.-07.09.2018, Kiel, Germany .


Dale, A. W. , Sommer, S. and Wallmann, K. (2018) Remineralization kinetics of organic carbon in surface marine sediments: considerations at the global scale. [Talk] In: ASLO Summer Meeting 2018. , 10.06.-15.06.2018, Victoria, Canada .


Lomnitz, U., Scholz, F., Dale, A. W. , Sommer, S., Plaß, A., Clemens, D. , Stolpovsky, K., Wallmann, K. and Hensen, C. (2018) A benthic phosphorus budget for the Peruvian oxygen minimum zone. [Talk] In: Ocean Deoxygenation Conference. , 03.09.-07.09.2018, Kiel, Germany .


Lüdke, J. , Clemens, D. , Dengler, M. , Krahmann, G. , Schmidtko, S. , Sommer, S., Thomsen, S. and Visbeck, M. (2018) Intra-seasonal variability of the eastern boundary circulation off Peru and biogeochemical consequences. [Talk] In: Ocean Deoxygenation Conference 2018. , 03.-07.09.2018, Kiel, Germany .

[thumbnail of Dengler_nutrient_budget_IAPSO.pdf]

Dengler, M. , Bryant, L. D., Sommer, S., Bourbonnais, A., Dale, A. W. , Krahmann, G. and Dullo, W. C. (2017) A benthic-pelagic nitrogen budget for the continental margin of the Peruvian oxygen minimum zone. Open Access [Talk] In: Good Hope for Earth Science - 2017 Joint IAPSO-IAMAS-IAGA Assembly. , 27.08.-01.09.2017, Cape Town, South Africa .


Schmidt, M. , Haeckel, M. , Sommer, S., Linke, P. , Greinert, J. and Wallmann, K. (2016) Marine CO2 and Methane Seeps. [Talk] In: CoMet Science Workshop, DLR Institut für Physik der Atmosphäre. , 30.11.-02.12.2016, Oberpfaffenhofen, Germany .


Wenzhoefer, F., Wulff, T., Floegel, S., Sommer, S. and Waldmann, C. (2016) ROBEX - Innovative robotic technologies for ocean observations, a deep-sea demonstration mission. [Talk] In: OCEANS 2016 MTS/IEEE Monterey. , 19.-23.09.2016, Monterey, USA . DOI 10.1109/OCEANS.2016.7761215.


Dale, A. , Sommer, S., Altabet, M., Bourbonnais, A., Lomnitz, U. and Wallmann, K. (2015) Biological nitrate transport and reduction in sediments in the Peruvian oxygen minimum zone. [Talk] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .


Gier, J., Sommer, S., Löscher, C., Dale, A. W. , Schmitz, R. A. and Treude, T. (2015) Nitrogen fixation in sediments along a depth transect through the Eastern Boundary Upwelling Systems off Peru and Mauritania. [Talk] In: AGU Fall Meeting 2015. , 14.-18.12.2015, San Francisco, USA .


Greinert, J. , Bialas, J. , Klaucke, I. , Crutchley, G. , Dale, A. , Rowden, A., Bowden, D., Linke, P. , Sommer, S., de Haas, H., de Stigter, H., Faure, K. and Liebetrau, V. (2013) Methane seepage along the Hikurangi Margin offshore New Zealand: multidisciplinary studies using R/V SONNE. [Talk] In: SONNE Statusseminar 2013. , 14.-15.02.2013, Kiel .


Haeckel, M. , Wallmann, K. , Schmidt, M. , Liebetrau, V., Sommer, S., Schroller, D., Schönfeld, J., Karstens, J. and Berndt, C. (2013) Fluid expulsion at a 3-km long fracture system in the Northern North Sea – geochemical constraints on the origin of gas and water . [Talk] In: AGU Fall Meeting 2013. , 09.-13.12.2013, San Francisco, USA .


Linke, P. , Schmidt, M. , Sommer, S., Schneider von Deimling, J. and Haeckel, M. (2013) Monitoring technologies & in situ measurements at the seafloor. [Talk] In: Subsea Leak Detection Symposium. , 19.-20.11.2013, Houston, USA .


Treude, T. , Bertics, V. J., Gier, J. and Sommer, S. (2013) Benthic nitrogen fixation and Mn/Fe reduction in the Mauritanian oxygen minimum zone: Two overlooked processes?. [Talk] In: Goldschmidt Conference 2013. , 25.-30.08.2013, Florence, Italy .


Vielstädte, L., Haeckel, M. , Linke, P. , McGinnis, D., Schmidt, M. , Sommer, S. and Wallmann, K. J. G. (2013) Footprint of CO2 leaking from the seabed: insights from a gas release experiment. [Talk] In: International Workshop on Leakage effects from natural analogues. , 13.05.2013, Bergen, Norway .


Vielstädte, L., Linke, P. , McGinnis, D., Sommer, S., Wallmann, K. J. G. , McGinnis, D. and Haeckel, M. (2013) The footprint of CO2 leakage in the water column: Insights from numerical modeling based on a North Sea gas release experiment. [Talk] In: AGU Fall Meeting 2013. , 09.-13.12.2013, San Francisco, USA .


Vielstädte, L., Linke, P. , Schmidt, M. , Sommer, S., Wallmann, K. , McGinnis, D. and Haeckel, M. (2013) The footprint of CO2 leakage in the water-column: Insights from numerical modeling based on a North Sea gas release experiment. [Talk] In: AGU Fall Meeting 2013. , 09.-13.12.2013, San Francisco, USA .


Dale, A. W. , Bohlen, L., Noffke, A., Sommer, S., Hensen, C. and Wallmann, K. (2012) A bottom-up perspective on N nd P cycling in low oxygen environments: the Baltic Sea versus the Peruvian shelf . [Talk] In: Goldschmidt Conference 2012. , 24.-29.06.2012, Montreal, Canada .


Greinert, J. , Bialas, J. , Klaucke, I. , Crutchley, G. , Dale, A. W. , Rowden, A., Bowden, D., Linke, P. , Sommer, S., de Haas, H., de Stigter, H., Faure, K. and Liebetrau, V. (2012) Methane seepage along the Hikurangi Margin offshore New Zealand: 6 years of multidisciplinary studies. [Talk] In: AGU Fall Meeting 2012. , 03.-07.12.2012, San Francisco, USA .


Greinert, J. , Veloso, M., Mienert, J., Sommer, S., Bussmann, I. and van Haren, H. (2012) Methane release from seeps offshore W-Svalbard: Considerations to extrapolate fluxes into the water/atmosphere. [Talk] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Greinert, J. , Veloso, M., Mienert, J., Sommer, S., Bussmann, I. and van Haren, H. (2012) Methane release from seeps offshore W-Svalbard: Considerations to extrapolate fluxes into the water/atmosphere. [Talk] In: Deep-Sea and Sub-Seafloor Frontier Conference. , 12-14.03.2012, Sitges, Spain .


Schmidt, M. , Farawati, R., Sommer, S., Linke, P. and Botz, R. (2012) Biogeochemistry of Red Sea brine. [Talk] In: JTP Scientific Meeting. , 28.11.2012, Jeddah, Saudi Arabia .


Sommer, S., Bohlen, L., Dale, A. W. , Wallmann, K. , Noffke, A., Hensen, C. , Mosch, T. and Pfannkuche, O. (2012) Nitrogen cycling across the Peruvian oxygen minimum zone surface sediments. [Talk] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .

[thumbnail of 2012_SommerSchmidtLinke_EGU2012-11118.pdf]

Sommer, S., Schmidt, M. and Linke, P. (2012) Dissolved methane pluming mapping using Membrane Inlet Mass-Spectrometry (MIMS) at a blowout site in the North Sea. Open Access [Talk] In: EGU General Assembly 2012. , 22.04.-27.04.2012, Vienna, Austria . Geophysical Research Abstracts. ; p. 11118 .


Bertics, V. J., Sommer, S., Dale, A. W. and Treude, T. (2011) Benthic Nitrogen and Sulfur Dynamics of Eckernförde Bay. [Talk] In: Boknis Eck Time Series Workshop. , 10.05.2011, Kiel, Germany .


Bertics , V. J., Sommer, S., Dale, A. W. , Schmitz, R. A. and Treude, T. (2011) Nitrogen Fixation in Sediments Beneath Oxygen Minimum Zones. [Talk] In: ISEB XX 2011 Frontiers in Biogeochemistry. , 22.-27.09.2011, Istanbul, Turkey .


Bertics, V. J., Sommer, S., Dale, A. W. , Teupe, M. and Treude, T. (2011) Benthic nitrogen and sulfur dynamics of a seasonally hypoxic region of the Baltic Sea, Eckernförde Bay. [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02.-18.02.2011, San Juan, Puerto Rico, USA .


Bohlen, L., Sommer, S., Dale, A. W. , Hensen, C. and Wallmann, K. (2011) Sediments underlying the Peruvian oxygen minimum zone – source or sink for reactive nitrogen species?. [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02.-18.02.2011, San Juan, Puerto Rico .


Noffke, A., Hensen, C. , Sommer, S., Croot, P., Scholz, F. and Wallmann, K. (2011) The benthic phosphorus and iron source across the Peruvian oxygen minimum zone. [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02-18.02.2011, San Juan, Puerto Rico .


Rovelli, L., Dengler, M. , Schmidt, M. , Sommer, S., Linke, P. and McGinnis, D. (2011) Turbulent mixing in the central North sea: sources and implications for vertical transport of dissolved gases during summertime. [Talk] In: 5. Warnemünde Turbulence Days on Turbulence and Mixing in Estuaries and Coastal Seas. , 05.09.-08.09.2011, Vilm .


Sommer, S., Schorp, T., McGinnis, D. F., Dale, A. W. and Pfannkuche, O. (2011) In situ fluxes of major nitrogen species, phosphorus, oxygen and silicate across the benthic boundary layer of the oxic to anoxic Gotland Basin (Baltic Sea). [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02.-18.02.2011, San Juan, Puerto Rico .


Treude, T. , Sommer, S., Pfannkuche, O., Greinert, J. , Bussmann, I., Bertics, V. and Veloso, M. and PO419 Scientific Party (2011) Preliminary results from the RV Poseidon 419 expedition to the methane seepage area off West Spitzbergen, Arctic Ocean. [Talk] In: AGU Fall Meeting 2011. , 05.12.-09.12.2011, San Francisco, California, USA .


Glock, N., Eisenhauer, A. , Milker, Y., Liebetrau, V., Schönfeld, J., Mallon, J., Sommer, S. and Hensen, C. (2010) Environmental Influences on the Pore Density in Bolivina spissa. [Talk] In: FORAMS 2010 - International Symposium on Foraminifera. , 05.09.-10.09.2010, Bonn .


Linke, P. , Freundt, A. , Geersen, J. , Kutterolf, S. , Liebetrau, V., Rovelli, L., Scholz, F., Sommer, S., Steeb, P., Treude, T. and Völker, D. (2010) ChiFlux - Identification and investigation of fluid flux, mass wasting and sediments in the forearc of the central Chilean subduction zone – First results from SONNE cruise SO-210. [Talk] In: SFB 574 SUBDUCTION WORKSHOP. , 04.-07.11.2010, Pucon, Chile .


Rovelli, L., Dengler, M. , Schafstall, J., Schmidt, M. , Sommer, S., Linke, P. and McGinnis, D. and University of Iceland (2010) Physical characterization of oxygen fluxes across the water column in the central North Sea. [Talk] In: 14th International Workshop on Physical Processes in Natural Waters (PPNW). , 28.06.-01.07.2010, Reykjavik, Iceland . Conference Proceedings / 14th International Workshop on Physical Processes in Natural Waters, Reykjavík, Iceland, June 28 to July 1, 2010 / Ed.: Hrund Ólöf Andradóttir. ; pp. 145-146 .


Schorp, T., Dale, A. W. , Sommer, S., Pfannkuche, O., Hansen, H. P. and Bange, H. W. (2010) Benthic nitrogen and phosphorus fluxes in a seasonally hypoxic channel in the Western Baltic Sea (Boknis Eck, Kiel Bight): current trends and long term perspectives. [Talk] In: Uncertainties of scenario simulations. , 14.10.2010, Norrköping, Sweden .


Sommer, S., McGinnis, D. F., Linke, P. , Camilli, R., Mosch, T. and Pfannkuche, O. (2010) Life at the edge - oscillating lower boundary of the Peruvian oxygen minimum zone. [Talk] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA . EOS Transactions : Ocean Sciences Meeting Supplement. ; BO24C-08 .


Linke, P. , Sommer, S., Rovelli, L. and McGinnis, D. (2009) Physical controls of cold seep methane emission. [Talk] In: Seminar Series. , 18.05, Kastanienbaum, Switzerland .

[thumbnail of 634_Linke_2009_PhysicalControlsOfColdSeep_Talk_pubid11978.pdf]

Linke, P. , Sommer, S., Rovelli, L. and McGinnis, D. (2009) Physical controls of cold seep methane emission. [Talk] In: OCEANS '09 IEEE, Balancing Technology with Future Needs. , 1105..-14.05, Bremen .


McGinnis, D., Brand, A., Bryant, L. D., Lorrai, C., Rovelli, L., Berg, P., Linke, P. , Sommer, S. and Wüest, A. (2009) The physics of benthic oxygen fluxes in oscillating environments. [Talk] In: Seminar Series. , 28.09, Aarhus, Denmark .


McGinnis, D., Sommer, S., Rovelli, L. and Linke, P. (2009) Ephemeral benthic methane peaks: understanding the physics of cold seep emissions. [Talk] In: Conference Physical Processes in Natural Waters. , 01.-04.09, Palermo, Italy .


Sommer, S., Linke, P. , Pfannkuche, O., Niemann, H. and Treude, T. (2009) Benthische Respiration in einem neuartigen, von ampharetiden Polychaeten dominierten "cold seep" Habitat des Hikurangi Kontinentalrands (Neuseeland). [Talk] In: SONNE Statusseminar "Meeresforschung mit FS Sonne". , 12.03.-13.02, Bremerhaven .


Sommer, S., Linke, P. , Pfannkuche, O., Niemann, H., Treude, T. , Dale, A. W. and Haeckel, M. (2009) Benthic respiration and energy transfer in cold seep habitats. [Talk] In: Goldschmidt Conference 2009 "Challenges to Our Volatile Planet". , 21.-26.06.2009, Davos, Switzerland ; A1249 . Geochimica et Cosmochimica Acta, 73 (13).


Sommer, S., McGinnis, D., Bryant, L. D. and Lorrai, C. (2009) Oxygen Dynamics in the Benthic Boundary Layer: Part a. Benthic oxygen dynamics in the Peruvian OMZ, Part b. Oxygen eddy correlation in oscillating environments. [Talk] In: Seminar Series. , 03.06, Kiel .


Haeckel, M. , Sommer, S. and Linke, P. (2008) Porewater geochemistry and methane fluxes of cold seeps at the Hikurangi margin, offshore New Zealand. [Other] In: EGU General Assembl. , 14.-18.04, Vienna, Austria .


Sommer, S. and Pfannkuche, O. (2008) Gasexchange system for extended in situ benthic chamber flux measurements under controlled oxygen conditions. [Invited talk] In: UNSPECIFIED. , 14.02, Gothenburg, Sweden .


Sommer, S., Linke, P. , Pfannkuche, O., Bowden, D. A., Haeckel, M. , Greinert, J. and Thurber, A. R. (2008) Novel cold seep habitat along the Hikurangi margin (New Zealand). [Other] In: EGU General Assembly. , 14.-18.04, Vienna, Austria .


Sommer, S., Linke, P. , Pfannkuche, O., Bowden, D., Greinert, J. and Haeckel, M. (2007) High sea bed methane emission rates at Hikurangi margin (New Zealand) associated with extremely abundant ampharetid polychaetes. [Talk] In: 97th Annual Meeting of the Geologische Vereinigung (GV) - The Oceans in the Earth System, International Conference 2007. , 01.-05.10, Bremen .


Sommer, S., Linke, P. , Pfannkuche, O., Bowden, D., Greinert, J. and Haeckel, M. (2007) High sea bed methane emission rates at Hikurangi margin (New Zealand) associated with extremely dense populations of ampharetid polychaetes. [Talk] In: 17th Goldschmidt Conference 2007. , 19.-24.08, Köln .


Sommer, S., Pfannkuche, O., Linke, P. , Schneider, J., Reitz, A., Hensen, C. and Haeckel, M. (2007) In situ measurement of sea bed methane emission from Captain Arutyunov mud volcano (Gulf of Cadiz). [Talk] In: EGU General Assembly. , 15-20.04, Vienna, Austria .


Sommer, S. (2006) Gashydrate - Energiequelle der Zukunft oder Gefahr für das Klima. [Public Lecture] In: UNSPECIFIED. , 11, Eislingen .


Sommer, S. (2006) Gashydrate - Monster der Tiefsee. [Public Lecture] In: Veranstaltung des Deutsch-Norwegischen Studienzentrums. , 10, Kiel .


Sommer, S., Pfannkuche, O., Linke, P. , Luff, R., Drews, M., Greinert, J. , Heeschen, K. and Gubsch, S. (2005) The efficiency of the benthic filter - biological control of the emission of dissolved methane from sediments hosting shallow gas hydrates. [Other] In: Statusseminar 2005 Meeresforschung mit FS Sonne. , 09.-11.03, Warnemünde .


Sommer, S., Pfannkuche, O., Linke, P. , Luff, R., Greinert, J. , Drews, M. and Gubsch, S. (2005) The efficiency of the benthic filter - biological control of the emission of dissolved methane from sediments hosting shallow gas hydrates. [Other] In: ASLO 2005 Aquatic Sciences Meeting. , 20.-25.02, Salt Lake City, USA .


Sommer, S., Pfannkuche, O., Linke, P. , Luff, R., Greinert, J. , Drews, M. and Heeschen, K. (2005) The efficiency of the benthic filter - biological control of the emission of dissolved methane from sediments hosting shallow gas hydrates. [Other] In: EGU General Assembly 2005. , 24.-29.04, Vienna, Austria .

Conference posters


Gros, J. , Flohr, A., Meklenburg, I., Dale, A. W. , Linke, P. and Sommer, S. (2020) Deployment of benthic chambers at the Goldeneye CO2 release field experiment: Lessons learned for CCS leak detection. [Poster] In: International Workshop on Offshore Geologic CO2 Storage and STEMM-CCS Open Science Meeting 2020. , 11.2.-12.2.2020, Bergen, Norway .

[thumbnail of Poster]

Barbie, A., Hasselbring, W., Sommer, S., Flögel, S. and Wenzhöfer, F. (2019) Continuous Software Engineering for Designing and Operating an Autonomous Ocean Observation System. Open Access [Poster] In: German Research Software Engineering Conference. , 04.-06.06.2019, Potsdam, Germany .


Gros, J. , Schmidt, M. , Dale, A. W. , Linke, P. , Vielstädte, L., Bigalke, N., Haeckel, M. , Wallmann, K. and Sommer, S. (2019) Simulating Panarea’s offshore multiple CO2 seeps as a natural proxy for potential leakage from sub-seabed CO2 storage. [Poster] In: STEMM-CCS 3. Annual Meeting. , 27.2.-1.3.2019, Amsterdam, Netherlands .


De Vera, J. P. P., Baquac, M., Billi, D., Böttger, U., Bulat, S., Czupalla, M., Dachwald, B., De La Torre, R., Elsaesser, A., Foucher, F., Korsitzky, H., Kozyrovska, N., Läufer, A., Moeller, R., Olsson-Francis, K., Onofri, S., Sommer, S., Wagner, D. and Westall, F. (2018) The search for Life on Mars and in the Solar System - Strategies, Logistics and Infrastructures. [Poster] In: 69. International Astronautical Congress (IAC). , 01.-05.10.2018, Bremen, Germany .


Loginova, A. N. , Dale, A. W. , Thomsen, S. , Sommer, S., Wallmann, K. and Engel, A. (2018) Sediment release of dissolved organic matter in the oxygen minimum zone off Peru . [Poster] In: Ocean Deoxygenation Conference. , 03.09.-07.09.2018, Kiel, Germany .


Stolpovsky, K., Sommer, S., Roy, A. S., Scholz, F., Plaß, A., Wallmann, K. , Lomnitz, U., Clemens, D. , Hensen, C. and Dale, A. W. (2018) An experimental and modeling investigation of sediment nutrient cycling during further deoxygenation on the Peruvian margin. [Poster] In: Ocean Deoxygenation Conference. , 03.09.-07.09.2018, Kiel, Germany .


Bryant, L. D., Dengler, M. , Sommer, S., Dale, A. , Altabet, M., Bourbonnais, A. and Dullo, C. (2015) Water-column nutrient fluxes along the continental margin of the Peruvian oxygen minimum zone. [Poster] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .

[thumbnail of EGU2015-13110.pdf]

Dengler, M. , Bryan, L., Sommer, S., Bourbonnais, A., Dullo, C. and Dale, A. W. (2015) A nitrogen budget for the continental margin of the Peruvian oxygen minimum zone. [Poster] In: EGU General Assembly 2015. , 12.–17.04.2015 , Vienna, Austria .


Lomnitz, U., Sommer, S., Hensen, C. , Dale, A. W. and Wallmann, K. (2014) Drivers and mechanisms for high phosphate (TPO4) release rates in the oxygen minimum zone off Peru. [Poster] In: ASLO Aquatic Sciences Meeting 2014. , 23.-28.02.2014, Honolulu, Hawaii .


Sommer, S., Dale, A. W. , Gier, J., Lomnitz, U. and Dengler, M. (2014) Benthic nitrogen cycling across Peruvian oxygen minimum zone surface sediments. [Poster] In: ASLO Aquatic Sciences Meeting 2014. , 23.-28.02.2014, Honolulu, Hawaii .

[thumbnail of EGU2014-6145.pdf]

Yücel, M., Dale, A. W. , Sommer, S. and Pfannkuche, O. (2014) Redox processes as revealed by voltammetry in the surface sediments of the Gotland Basin, Baltic Sea. [Poster] In: EGU General Assembly 2014. , 27.04.-02.05.2014, Vienna, Austria .

[thumbnail of Abstract]

Steinle, L., Wilfert, P., Schmidt, M. , Bryant, L. D., Haeckel, M. , Lehmann, M. F., Linke, P. , Sommer, S., Treude, T. and Niemann, H. (2013) News from the "blowout", a man-made methane pockmark in the North Sea: chemosynthetic communities and microbial methane oxidation. [Poster] In: EGU General Assembly 2013. , 07.-12.04.2013, Vienna, Austria .


Noffke, A., Sommer, S., Dale, A. W. , Bertics, V. and Pfannkuche, O. (2012) Internal nutrient loading of N and P across the benthic boundary layer of the oxic to anoxic Gotland Basin (Baltic Sea). [Poster] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Bohlen, L., Sommer, S., Dale, A. W. , Hensen, C. and Wallmann, K. (2010) Sediments underlying the Peruvian OMZ - sink or source for reactive N species. [Poster] In: Ocean Sciences Meeting 2010 "Nitrogen Cycling Near Oxygen Minima Zones: Linking Observations to Global Models of Nitrogen Fixation in the Anthropocene". , 22.02.-26.02.2010, Portland, Oregon, USA . EOS Transactions : Ocean Sciences Meeting Supplement. ; IT15D-03 .


Mallon, J., Glock, N., Schönfeld, J. and Sommer, S. (2010) Living (Rose Bengal) stained benthic foraminifera of the Peruvian oxygen minimum zone - discovering new proxies for oxygen reconstruction. [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA .


Mosch, T., Sommer, S., Pfannkuche, O. and Wallmann, K. (2010) Habitat mapping in the Peruvian OMZ. [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA ; BO35C-08 .


Mosch, T., Sommer, S., Pfannkuche, O. and Wallmann, K. (2010) Hapitat Mapping in the Peruvian OMZ . [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA .


Noffke, A., Hensen, C. , Sommer, S., Scholz, F., Mosch, T. and Wallmann, K. (2010) Benthic fluxes of iron, phosphate and silicate across the Peruvian Oxygen Minimum Zone. [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA . EOS Transactions : Ocean Sciences Meeting Supplement. ; BO35C-09 .


Glock, N., Eisenhauer, A. , Milker, Y., Liebetrau, V., Schönfeld, J., Mallon, J., Sommer, S. and Hensen, C. (2009) The Sensitivity of Pore Density in Tests of Bolivina Spissa to ambient Oxygen and Nitrate concentration. [Poster] In: GV Annual Meeting 2009. , 05.-07.10, Göttingen .


Linke, P. , Sommer, S. and McGinnis, D. (2008) Physical limitations of dissolved methane fluxes: The role of bottom-boundary layer processes. [Poster] In: EGU General Assembly. , 14.-18.04, Vienna, Austria .


Krieger, K., Sommer, S., Drews, M. and Pfannkuche, O. (2007) Increased standing stocks of metazoan meiofauna in Gulf of Mexico seeps: oil or methane driven?. [Poster] In: EGU General Assembly. , 04, Vienna, Austria .


Schönfeld, J., Sommer, S., Pfannkuche, O. and Dullo, W. C. (2007) Benthic foraminifera from mud volcanoes in the Gulf of Cadiz: food and oxygen decoupled?. [Poster] In: Micropalaeontological Society's Foraminifera and Nannofossil Groups Joint Spring Meeting. , 07-08.06, Angers .

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Sommer, S., Gutzmann, E., Schnell, J. and Pfannkuche, O. (2007) Sediments hosting gas hydrates - oases for metazoan meiofauna?. [Poster] In: EGU General Assembly. , 04, Vienna, Austria .


Sommer, S., Pfannkuche, O., Linke, P. , Schneider, J., Reitz, A., Hensen, C. and Haeckel, M. (2007) In situ seabed emission from Captain Arutyunov mud volcano (Gulf of Cadiz). [Poster] In: 97th Annual Meeting of the Geologische Vereinigung (GV) - The Oceans in the Earth System, International Conference 2007. , 01.-05.10, Bremen .

Conference pico

[thumbnail of EGU2019-14991.pdf]

Lüdke, J. , Clemens, D. , Dengler, M. , Krahmann, G. , Sommer, S., Thomsen, S. and Visbeck, M. (2019) Influence of eastern boundary circulation variability on hydrography and biogeochemistry off Peru in early 2017. [PICO] In: EGU General Assembly 2019. , 07.-12.04.2019, Vienna, Austria .

Reports - Cruise Reports

[thumbnail of Fahrtbericht AL616_Sommer_Dale_.pdf]

Sommer, S., Dale, A. W. , Bernsee, S., Domeyer, B., Nolte, G., Kitte, A., Pankan, L., Okolski, S., Petersen, A., Subic, A., Surberg, R., Kalapurakkal, H. T. and Türk, M. (2025) Field-experiment to determine the short-term impact of bottom trawling on the benthic ecosystem in the German coastal Baltic Sea - Cruise No. AL616, 18.07. – 09.08.2024, Kiel (Germany) – Kiel (Germany), MGF-OSTSEE-2024. Open Access . Alkor-Berichte, AL616 . GEOMAR Helmholtz Centre for Ocean Research Kiel, 42 pp. DOI 10.3289/CR_AL616.

[thumbnail of awi_fae918832c2cb3f5afa5f7388754b8043657daf1.pdf]

Kampmeier, M., Dale, A. W. , Greinert, J. , Hoving, H. J. , Pontiller, B. , Scheppukat, D., Sommer, S. and Wenzlaff, E. (2024) Role of Eddies in the Carbon Pump of Eastern Boundary Upwelling Systems, REEBUS, Cruise No. M182, 31.05. - 10.07.2022, Mindelo (Cap Verde) - Pt. Delgada (Azores), MOSES Eddy Study III. Open Access . METEOR-Berichte, M182 . Begutachterpanel Forschungsschiffe, Bonn, 149 pp. DOI 10.48433/cr_m182.

[thumbnail of Fahrtbericht AL570 Sommer et al-1.pdf]

Sommer, S., Arndt, H., Bernsee, S., Clemens, D. , Gogina, M., Hoffmann, S., Janßen, M., Kallmeyer, J., Kitte, A., Piontek, J. , Roeser, P., Sachs, M., Surberg, R., Türk, M. and Jürgens, K. (2022) Potential effects of the exclusion of bottom fishing in the marine protected areas (MPAs) of the western Baltic Sea – third year observations. Cruise No. AL570, 22.03. – 11.04.2022, Kiel (Germany) – Kiel (Germany). MGF-OSTSEE-2022. Open Access . Alkor-Berichte, AL570 . GEOMAR Helmholtz Centre for Ocean Research, 74 pp. DOI 10.3289/CR_AL570.

[thumbnail of ALKOR_AL547_Cruise Report_fin-1.pdf]

Sommer, S., Flögel, S., Walter, M. and Wenzhöfer, F. (2022) Autonomous Robotic Network to Resolve Coastal Oxygen Dynamics : Cruise No. AL547, 20.10. – 31.10.2020, Kiel – Kiel, ARCODYN. Open Access . Alkor-Berichte, AL547 . GEOMAR Helmholtz Centre for Ocean Research Kiel, 24 pp. DOI 10.3289/CR_AL547.

[thumbnail of AL561 cruise report_rev.pdf]

Schmidt, M. , Sommer, S., Böttner, C. , Dale, A. W. , Lenz, N. and Spiegel, T. (2021) Dynamics and variability of POC burial in depocenters of the North Sea (Skagerrak), Cruise No. AL561, 2.08.2021 – 13.08.2021, Kiel – Kiel, APOC . Open Access . Alkor-Berichte, AL561 . GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, 34 pp. DOI 10.3289/CR_AL561.

[thumbnail of CR_M156.pdf]

Sommer, S., Adam, N., Becker, K., Dale, A. W. , Hahn, J. , Kampmeier, M., Paulsen, M., Katzenmeier, S. and Körtzinger, A. (2020) Role of Eddies in the Carbon Pump of Eastern Boundary Upwelling Systems, REEBUS, Cruise No. M156, 03.07. – 01.08.2019 Mindelo (Cap Verde) – Mindelo . Open Access . Meteor Berichte, M156 . Gutachterpanel Forschungsschiffe, Bonn, 53 pp. DOI 10.2312/cr_m156.

[thumbnail of awi_doi~10.2312_cr_m137.pdf]

Sommer, S. and Dengler, M. and Shipboard Scientific Party (2019) Benthic element cycling, fluxes and transport of nutrients and trace metals across the benthic boundary layer in the Peruvian oxygen minimum zone (SFB 754), Cruise No. 137, 06.05. – 29.05.2017 Callao (Peru) – Callao. Open Access . METEOR-Berichte, M137 . DFG-Senatskommission für Ozeanographie, Bremen, Germany, 52 pp. DOI 10.2312/cr_m137.

[thumbnail of CR M157.pdf]

Zabel, M., Mohrholz, V., Schulz-Vogt, H., Sommer, S. and Zettler, M. (2019) The Benguela System under climate change Effects of variability in physical forcing on carbon and oxygen budgets, Cruise No. M157, 04.08.2019 - 16.09.2019, Mindelo (Cape Verde) - Walvis Bay (Namibia). BUSUC 1 . Open Access . Meteor Berichte, M157 . Leitstelle Meteor, Hamburg, 58 pp. DOI 10.2312/cr_m157.

[thumbnail of M136.pdf]

Dengler, M. and Sommer, S. (2017) Coupled benthic and pelagic oxygen, nutrient and trace metal cycling, ventilation and carbon degradation in the oxygen minimum zone of the Peruvian continental margin (SFB 754): Cruise No. M 136 11.04. – 03.05.2017 Callao (Peru) – Callao Solute-Flux Peru I. Open Access . GEOMAR, Kiel, Germany, 43 pp. DOI 10.3289/CR_M136.

[thumbnail of CR_M107.pdf]

Sommer, S., Dengler, M. and Treude, T. (2015) Benthic element cycling, fluxes and transport of solutes across the benthic boundary layer in the Mauritanian oxygen minimum zone, (SFB754) - Cruise No. M107, May 30 - July 03, 2014, Fortaleza (Brazil) - Las Palmas (Spain). Open Access . METEOR-Berichte, M107 . DFG-Senatskommission für Ozeanographie, Bremen, 67 pp. DOI 10.2312/cr_m107.

[thumbnail of CR_M92.pdf]

Sommer, S., Dengler, M. and Treude, T. (2014) Benthic element cycling, fluxes and transport of solutes across the benthic boundary layer in the Peruvian oxygen minimum zone, (SFB 754) - Cruise No. M92, January 05 - February 03, 2013, Callao (Peru) - Callao (Peru). Open Access . METEOR-Berichte, M92 . DFG-Senatskommission für Ozeanographie, Bremen, 55 pp. DOI 10.2312/cr_m92.

Reports - Short Cruise Reports

[thumbnail of Short cruise Report POS487.pdf]

Sommer, S. (2015) Short Report POSEIDON Cruise POS487: Biogeochemistry interactions in the anoxic/suboxic Gotland Basin: redox-dependent cycles of nitrogen species and phosphorous, in situ experiments, Kiel – Rostock, 15. July – 13. Aug. 2015. Open Access . GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany, 14 pp. DOI 10.3289/SCR_POS_487.

[thumbnail of Short-Rep._POS476-477.pdf]

Pfannkuche, O. and Sommer, S. (2014) Short Report POSEIDON Cruise 476-77 [POS476 / POS477] - Biogeochemistry interactions in the anoxic/suboxic eastern Gotland Basin, Kiel - Kiel, 17. – 24. Oct. 2014. Open Access . GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany, 5 pp. DOI 10.3289/SCR_POS_476.

Reports - Weekly reports

[thumbnail of AL616 Wochenbericht 3 dt .docx] [thumbnail of AL616 Wochenbericht 3 engl.docx]

Sommer, S. (2024) 3. Wochenbericht AL616. Open Access . GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany, 3 pp.

[thumbnail of AL616 Wochenbericht 2 dt .docx] [thumbnail of AL616 Wochenbericht 2 engl.docx]

Sommer, S. (2024) 2. Wochenbericht AL616. Open Access . GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany, 3 pp.

[thumbnail of AL616 Wochenbericht 1 dt.docx] [thumbnail of AL616 Wochenbericht 1 engl.docx]

Sommer, S. (2024) 1. Wochenbericht AL616. Open Access . GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany, 3 pp.

[thumbnail of 2. Wochenbericht MSM114.pdf] [thumbnail of 2. Weekly Report MSM114.pdf]

Sommer, S. (2023) 2. Wochenbericht FS MARIA S. MERIAN - MSM114. Open Access . GEOMAR Helmholtz Zentrum für Ozeanforschung Kiel, 3 pp.

[thumbnail of 1. Wochenbericht MSM114.pdf] [thumbnail of 1. Weekly Report MSM114.pdf]

Sommer, S. (2023) 1. Wochenbericht FS MARIA S. MERIAN - MSM114. Open Access . GEOMAR Helmholtz Zentrum für Ozeanforschung Kiel, 3 pp.

[thumbnail of AL570 Wochenbericht 2 Sommer.pdf]

Sommer, S. (2022) 2. Wochenbericht Alkor Expedition AL570. Open Access . GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, 4 pp.

[thumbnail of AL570 Wochenbericht 1 Sommer.pdf]

Sommer, S. (2022) 1. Wochenbericht Alkor Expedition AL570. Open Access . GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, 2 pp.

[thumbnail of M156-4.WB.pdf]

Sommer, S. (2019) 4. Wochenbericht Meteor Reise M156 REEBUS. Open Access . UNSPECIFIED, 4 pp.

[thumbnail of M156-3.WB.pdf]

Sommer, S. (2019) 3. Wochenbericht Meteor Reise M156 REEBUS. Open Access . UNSPECIFIED, 4 pp.

[thumbnail of M156-2WB.pdf]

Sommer, S. (2019) 2. Wochenbericht Meteor Reise M156 REEBUS. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of M156 -1WB.pdf]

Sommer, S. (2019) 1. Wochenbericht Meteor Reise M156 REEBUS. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of M137 Wochenbericht 1.pdf] [thumbnail of M137 Wochenbericht 1 engl.pdf]

Sommer, S. and M137 Team (2017) 1. Wochenbericht Meteor Reise M137. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of M137-WB2_de.pdf] [thumbnail of M137-WB2_en.pdf]

Sommer, S. and M137 Team (2017) 2. Wochenbericht Meteor Reise M137. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of M137-WB3_de.pdf] [thumbnail of M137-WB3_engl.pdf]

Sommer, S. and M137 Team (2017) 3. Wochenbericht Meteor Reise M137. Open Access . UNSPECIFIED, 4 pp.

[thumbnail of M137-1WB_de.pdf] [thumbnail of M137-1WB_en.pdf]

Sommer, S. and M137 Team (2017) 4. Wochenbericht Meteor Reise M137. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of M107 Wochenbericht 4 .pdf]

Sommer, S. (2014) 4. Wochenbericht M107. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of M107 Wochenbericht 3-1.pdf]

Sommer, S. (2014) 3. Wochenbericht M107. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of M107 Wochenbericht 2.pdf]

Sommer, S. (2014) 2. Wochenbericht M107. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of M107 Wochenbericht 1.pdf]

Sommer, S. (2014) 1. Wochenbericht M107. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of M107 Wochenbericht 5.pdf]

Sommer, S. and Das M107 Team (2014) 5. Wochenbericht M107. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of M92 Wochenbericht_1.pdf]

Sommer, S. (2013) 1. Wochenbericht M92. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of M92 Wochenbericht_2.pdf]

Sommer, S. (2013) 2. Wochenbericht M92. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of 92-Wochenbericht 3.pdf]

Sommer, S. (2013) 3. Wochenbericht M92. Open Access . UNSPECIFIED, 2 pp.

[thumbnail of 92-Wochenbericht 4.pdf]

Sommer, S. (2013) 4. Wochenbericht M92. Open Access . UNSPECIFIED, 3 pp.

[thumbnail of 92-Wochenbericht 5.pdf]

Sommer, S. (2013) 5. Wochenbericht M92. Open Access . UNSPECIFIED, 2 pp.

This list was generated on Sat Apr 26 15:08:53 2025 CEST.