KlimaCampus Kolloquium: The ocean carbon sink, today and tomorrow

The ocean is currently absorbing one quarter of all anthropogenic carbon emissions due to fossil fuel combustion and deforestation, thus significantly limiting the pace of increasing atmospheric CO2 and anthropogenic climate change. For the next decades, ocean models indicate that ocean carbon uptake will continue under all scenarios to 2100 (very high confidence, IPCC, 2013). There is also high agreement between models that climate change, through ocean warming and circulation changes, will partially offset this increase caused by rising atmospheric CO2.

Yet, there are still some severe inconsistencies between model simulations and carbon cycle observations over the last decades, very large regional differences in future projections performed with ocean carbon cycle models, and important processes that are still missing in the models. In this presentation, I review some of these shortcomings and present some on-going work aiming at resolving these issues, focusing on (1) unrepresented processes related to marine ecosystems, (2) the contribution of coastal ocean processes, and (3) the potential large variability in air-sea carbon fluxes, as shown by observations and underestimated by ocean models.

Date

25.01.2018

Time

15:15 h

Place

Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg

Speaker

Laurent Bopp, LSCE, IPSL

Organizers

Tatiana Ilyina

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