Dr. Theresa Barthelmeß

 

 

PostDoc

Helmholtz Changing Earth Topic 6: Marine Life

Research division 2: Marine Biogeochemistry
Resarch unit: Biological Oceanography

Office:
Raum: 2-115
Tel: +49 431 600-1509
Email: tbarthelmess(at)geomar.de
Address:
Wischhofstraße 1-3
D-24148 Kiel

Research Interest

  • Enrichment dynamics of organic material in the sea surface microlayer (SML) linking the ocean surface to the lower atmosphere 
  • Air-sea interaction processes including primary and secondary aerosol formation 
  • Biogenic, surface-active substances influencing air-sea gas exchange 

Projects

  • BASS (Biogeochemical processes and Air–sea exchange in the Sea-Surface microlayer), SP1.1 Dynamic enrichment processes of organic matter in the SML
  • SOPHYAC-light (Responses of the Southern Ocean phytoplankton to climate changes, and feedbacks to the atmosphere - impact of light)
  • Diel microbial dynamics and their influence on NO and DMS emission and secondary organic aerosol formation (Flexible Geomar Funds)
  • PolarChange 2023 (Biogeochemical cycling at the air-sea interface)

Education and Career

Since April 2024 Postdoc at GEOMAR

May 2019 - March 2024 PhD student in the department of Marine Biogeochemistry at GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany

October 2016 - April 2019 M.Sc. in Biological Oceanography, Christian-Albrechts Universität and GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany

October 2012 - August 2015 B.Sc. in Biology, Julius-Maximilians Universität, Würzburg, Germany

Awards and Scholarships

December 2024, Prof. Dr. Werner Petersen foundation award for early career researchers.

November 2019 to April 2020, DAAD (German Academic Exchange Service) scholarship. Research stay in cooperation with NIWA (National Institute of Water and Atmospheric Research), Wellington, New Zealand. Studying biogeochemical SML dynamics at costal and open ocean stations to assess specific gas and particle formation as part of the marine primary aerosol pool.

January to April 2015, DAAD scholarship. Research stay in cooperation with Kuala Belalong Tropical Field Studies Centre, Brunei Darussalam, Borneo. Studying the trophic role of a ground-dwelling litter frog.

Expeditions

[10] 12/2024-02/2025 RV MARION DUFRESNE II, cruise MD247 (SOPHYAC-light). Studying biogeochemical processes and their influence on precursor species and secondary aerosol formation in Air-Sea-Interaction-Tanks (ASITS) in the subtropical to subpolar Indian Ocean.

[9] 07/2024 RV HEINCKE, cruise HE644 (BASS). Studying biogeochemical processes and air–sea exchange in the sea-surface microlayer, North Sea.

[8] 04-05/2024 RV SONNE, cruise SO305 (BIOCAT-IIOE2). Studying biogeochemical and atmospheric processes in the Bay of Bengal, Indian Ocean.

[7] 02-03/2023 RV HESPERIDES, Polar Change. Exploring air-sea interaction processes at the marginal ice zone in the Weddell Sea, Antarctica.

[6] 05-06/2022 RV MERIAN, cruise MSM108 (PEBCAO), Hausgartenstationen, Arctic.

[5] 03-04/2020 RV TANGAROA, cruise TAN2003 (Sea2Cloud). Studying the influence of surface biology (including phytoplankton blooms) on the formation process of marine primary and secondary aerosols in collaboration with LaMP and NIWA.

[4] 09/2018 RV ALKOR, cruise AL516 (BalticGasEx II). Air-sea gas exchange study combining air-side eddy covariance measurements and water-side tracer release experiments with small scale SML sampling influenced by a potential varying surfactant pool (autumn) in close proximity to the time series station Boknis Eck, Baltic Sea.

[3] 06/2018 RV ALKOR, cruise AL510 (BalticGasEx I). Air-sea gas exchange study combining air- and water-side measurements with small scale SML sampling influenced by a potential varying surfactant pool (summer) in close proximity to the time series station Boknis Eck, Baltic Sea.

[2] 01-02/2018 RV POSEIDON, cruise POS519. SML study to better constrain submesoscalic air-sea dynamics in the Eastern Boundary Upwelling System off Mauritania. 

[1] 05/2017 RV ALKOR, cruise AL493. Multidisciplinary monitoring program, in particular focusing on fish populations in the Baltic Sea as part of a long-term international survey (EU BONUS BIO-C3).

Publications

Barthelmeß, T., Cristi, A., Deppeler, S., Safi, K., Sellegri, K., Law, C. S. & Engel, A. (2024). Pronounced Diel Cycling of Dissolved Carbohydrates and Amino Acids in the Surface Ocean and across Diverse Regimes. Environmental Science & Technology. doi.org/10.1021/acs.est4c00491

Chamba, G., Rissanen, M., Barthelmeß, T., Saiz-Lopeze, A., Rose, C., Siddharth, I., Saint-Macary, A., Roccoa, M., Safih, K., Deppeler, S., Barr, N., Harvey, M., Engel, A., Dunnei, E., Law, C. S., & Sellegri, K. (2023). Evidence of nitrate- based nighttime atmospheric nucleation driven by marine microorganisms in the South Pacific. Proceedings of the National Academy of Sciences, 120(48). doi.org/10.1073/pnas

Sellegri, K., Barthelmeß, T., Trueblood, J., Cristi, A., Freney, E., Rose, C., Barr, N., Harvey, M., Safi, K., Deppeler, S., Thompson, K., Dillon, W., Engel, A., & Law, C. (2023). Quantified effect of seawater biogeochemistry on the temperature dependence of sea spray aerosol fluxes. Atmospheric Chemistry and Physics, 23(20), 12949–12964. doi.org/10.5194/acp-23-12949-2023

Barthelmeß, T., & Engel, A. (2022). How biogenic polymers control surfactant dynamics in the surface microlayer: insights from a coastal Baltic Sea study. Biogeosciences, 19(20), 4965–4992. doi.org/10.5194/bg-19-4965-2022

Barthelmeß, T., Schütte, F., & Engel, A. (2021). Variability of the Sea Surface Microlayer Across a Filament’s Edge and Potential Influences on Gas Exchange. Frontiers in Marine Science, 8(October), 1–21. doi.org/10.3389/fmars.2021.718384