Sensitivities of marine carbon fluxes to ocean change.

Riebesell, Ulf , Körtzinger, Arne and Oschlies, Andreas (2009) Sensitivities of marine carbon fluxes to ocean change. PNAS Proceedings of the National Academy of Sciences of the United States of America, 106 . pp. 20602-20609. DOI 10.1073/pnas.0813291106.

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Throughout Earth's history, the oceans have played a dominant role in the climate system through the storage and transport of heat and the exchange of water and climate-relevant gases with the atmosphere. The ocean's heat capacity is ≈1,000 times larger than that of the atmosphere, its content of reactive carbon more than 60 times larger. Through a variety of physical, chemical, and biological processes, the ocean acts as a driver of climate variability on time scales ranging from seasonal to interannual to decadal to glacial–interglacial. The same processes will also be involved in future responses of the ocean to global change. Here we assess the responses of the seawater carbonate system and of the ocean's physical and biological carbon pumps to (i) ocean warming and the associated changes in vertical mixing and overturning circulation, and (ii) ocean acidification and carbonation. Our analysis underscores that many of these responses have the potential for significant feedback to the climate system. Because several of the underlying processes are interlinked and nonlinear, the sign and magnitude of the ocean's carbon cycle feedback to climate change is yet unknown. Understanding these processes and their sensitivities to global change will be crucial to our ability to project future climate change.

Document Type: Article
Keywords: climate change, marine carbon cycle, ocean acidification, ocean warming
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1073/pnas.0813291106
ISSN: 0027-8424
Projects: Future Ocean
Date Deposited: 14 Jan 2010 12:38
Last Modified: 23 Sep 2019 18:13

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