Ocean deoxygenation from climate change.

Oschlies, Andreas (2019) Ocean deoxygenation from climate change. Open Access In: Ocean deoxygenation: everyone’s problem. Causes, impacts, consequences and solutions. , ed. by Laffoley, D. and Baxter, J. M.. IUCN, Gland, Switzerland, pp. 1-21. ISBN 978-2-8317-2013-5

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Abstract

Summary
• According to the most recent observational estimate, the ocean lost 2% of its oxygen inventory between 1960 and 2010.
• About 15% (range 10-30%) of the oxygen loss is attributed to warming-induced decline in solubility (high confidence).
• Less than 15% of the oxygen decline can be attributed to warming-induced changes in respiration of particulate and dissolved organic matter. Enhanced respiration will tend to generate oxygen deficits close to the sea
surface. The increased near-surface vertical oxygen gradient may even increase ocean uptake of oxygen from the atmosphere (low confidence).
• The majority of oxygen loss has been caused by changes in ocean circulation and associated ventilation with oxygen from the ocean surface (medium confidence).
• Current state-of-the-art models simulate deoxygenation rates more than 2 times smaller than the most recent data-based global estimate.

Document Type: Book chapter
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
Date Deposited: 11 Dec 2019 10:44
Last Modified: 11 Dec 2019 10:46
URI: http://oceanrep.geomar.de/id/eprint/48396

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