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Quantification of ocean heat uptake from changes in atmospheric O2 and CO2 composition.
Resplandy, L., Keeling, R. F., Eddebbar, Y., Brooks, M. K., Wang, R., Bopp, L., Long, M. C., Dunne, J. P., Koeve, Wolfgang and Oschlies, Andreas (2019) Quantification of ocean heat uptake from changes in atmospheric O2 and CO2 composition. Scientific Reports, 9 . Art.Nr. 20244. DOI 10.1038/s41598-019-56490-z.
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Abstract
The ocean is the main source of thermal inertia in the climate system. Ocean heat uptake during recent decades has been quantified using ocean temperature measurements. However, these estimates all use the same imperfect ocean dataset and share additional uncertainty due to sparse coverage, especially before 2007. Here, we provide an independent estimate by using measurements of atmospheric oxygen (O2) and carbon dioxide (CO2) – levels of which increase as the ocean warms and releases gases – as a whole ocean thermometer. We show that the ocean gained 1.29 ± 0.79 × 1022 Joules of heat per year between 1991 and 2016, equivalent to a planetary energy imbalance of 0.80 ± 0.49 W watts per square metre of Earth’s surface. We also find that the ocean-warming effect that led to the outgassing of O2 and CO2 can be isolated from the direct effects of anthropogenic emissions and CO2 sinks. Our result – which relies on high-precision O2 atmospheric measurements dating back to 1991 – leverages an integrative Earth system approach and provides much needed independent confirmation of heat uptake estimated from ocean data.
Document Type: | Article |
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Research affiliation: | OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling Scripps |
Refereed: | Yes |
Open Access Journal?: | No |
Publisher: | Nature Research |
Related URLs: | |
Date Deposited: | 08 Jan 2020 08:23 |
Last Modified: | 31 Jan 2022 09:16 |
URI: | https://oceanrep.geomar.de/id/eprint/48614 |
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Quantification of ocean heat uptake from changes in atmospheric O2 and CO2 composition (deposited 19 Nov 2018 12:35)
- Quantification of ocean heat uptake from changes in atmospheric O2 and CO2 composition (deposited 08 Jan 2020 08:23) [Currently Displayed]
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