EGU General Assembly 2020
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the Creative Commons Attribution 4.0 License.

The Ocean's Alkalinity: Connecting geological and metabolic processes and time-scales

Helmuth Thomas1, Mona Norbisrath1, Nele Treblin1, Bryce van Dam1, Johannes Pätsch1,2, and Kay-Christian Emeis1,3
Helmuth Thomas et al.
  • 1Helmholtz-Zentrum Geesthacht, Institute for Coastal Research, Geesthacht, Germany (
  • 2University of Hamburg, Institute of Marine Sciences Hamburg, Germany
  • 3University of Hamburg, Institute of Geology, Hamburg, Germany

The Earth system has entered a new geological epoch, the Anthropocene. The oceans’ capacity to regulate atmospheric carbon dioxide (CO 2 ) at various
timescales is amongst the most crucial players to maintain climate on Earth in a habitable range. The biogeochemical property exerting this regulatory mechanism is alkalinity, the oceans’ CO 2 and pH buffer capacity. The proposed project will investigate how the oceans’ alkalinity is impacted firstly by human measures, required by the Paris agreement (COP 21) to mitigate climate change via bioenergy production and its downstream effects on shallow oceans, and secondly by climate change, in particular by increased weathering in the Arctic because of ice retreat.

How to cite: Thomas, H., Norbisrath, M., Treblin, N., van Dam, B., Pätsch, J., and Emeis, K.-C.: The Ocean's Alkalinity: Connecting geological and metabolic processes and time-scales, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-2855,, 2020.

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