GEOMAR Helmholtz Centre for Ocean Research Kiel
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February 15, 2021: Online Ocean Circulation and Climate Dynamics Colloquium
Dr. Jörg Lippold, Past Ocean Dynamics, Institute of Earth Sciences, Heidelberg University, Heidelberg (Germany): "The AMOC of the last glacial - news on an old question"
online 11 am
Webex meeting room: https://geomar.webex.com/geomar/j.php?MTID=md1021a7b52e85e55b897459966c6d200
Meeting number (access code): 183 105 3676
Meeting password: Y9kzhppXf22
During the Holocene time-period deep-water formation has been active and vigorous in the North Atlantic and NADW has occupied a large fraction of the deep Atlantic basin. The possibility that the Atlantic overturning circulation could change in the future motivates us to understand how it may have differed in the past. The LGM, about 21 kyrs ago, represents the climatic opposite end-member situation of our current Interglacial, with AMOC controlled by factors different from today (such as freshwater budgets, ice sheets, atmospheric circulation). Thus, the AMOC of the LGM has been investigated extensively for decades. Despite this long-standing research question, the available proxy records diverge. While there is a widely accepted notion of Southern Sourced Water (SSW) replacing large volumes of Northern Sourced Water (NSW) during the LGM, there is now a lack of consensus when it comes to the dynamics and geometry of glacial NSW. In this seminar, I will discuss new proxy results and present a potentially different view on the AMOC of the LGM.
