A committed fourfold increase in ocean oxygen loss.

Oschlies, Andreas (2021) A committed fourfold increase in ocean oxygen loss. Open Access Nature Communications, 12 . Art.Nr. 2307. DOI 10.1038/s41467-021-22584-4.

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Less than a quarter of ocean deoxygenation that will ultimately be caused by historical CO2 emissions is already realized, according to millennial-scale model simulations that assume zero CO2 emissions from year 2021 onwards. About 80% of the committed oxygen loss occurs below 2000 m depth, where a more sluggish overturning circulation will increase water residence times and accumulation of respiratory oxygen demand. According to the model results, the deep ocean will thereby lose more than 10% of its pre-industrial oxygen content even if CO2 emissions and thus global warming were stopped today. In the surface layer, however, the ongoing deoxygenation will largely stop once CO2 emissions are stopped. Accounting for the joint effects of committed oxygen loss and ocean warming, metabolic viability representative for marine animals declines by up to 25% over large regions of the deep ocean, posing an unavoidable escalation of anthropogenic pressure on deep-ocean ecosystems.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/H2020/820989
Keywords: Element cycles; Marine chemistry
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
Corresponding Author:
Corresponding Author Name
Oschlies, Andreas
Oschlies, Andreas
FB2-BM Biogeochemical Modeling
Main POF Topic: PT2: Ocean and Cryosphere
Refereed: Yes
Open Access Journal?: Yes
Publisher: Nature Research
Related URLs:
Projects: COMFORT, Opendap
Date Deposited: 26 Apr 2021 11:09
Last Modified: 08 Feb 2023 09:28
URI: https://oceanrep.geomar.de/id/eprint/52410

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