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| Frolicher, Thomas L.; Sarmiento, Jorge L.; Paynter, David J.; Dunne, John P.; Krasting, John P.; Winton, Michael. |
| The authors assess the uptake, transport, and storage of oceanic anthropogenic carbon and heat over the period 1861-2005 in a new set of coupled carbon-climate Earth system models conducted for the fifth phase of the Coupled Model Intercomparison Project (CMIP5), with a particular focus on the Southern Ocean. Simulations show that the Southern Ocean south of 30 degrees S, occupying 30% of global surface ocean area, accounts for 43% 63% (42 + 5 PgC) of anthropogenic CO2 and 75% 622% (23 + 9 x 10(22) J) of heat uptake by the ocean over the historical period. Northward transport out of the Southern Ocean is vigorous, reducing the storage to 33 +/- 6 Pg anthropogenic carbon and 12 +/- 7 x 10(22) J heat in the region. The CMIP5 models, as a class, tend to... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00383/49431/49841.pdf |
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| Burger, Friedrich A.; John, Jasmin G.; Frolicher, Thomas L.. |
| Ocean acidity extreme events are short-term periods of relatively high [H+] concentrations. The uptake of anthropogenic CO2 emissions by the ocean is expected to lead to more frequent and intense ocean acidity extreme events, not only due to changes in the long-term mean but also due to changes in short-term variability. Here, we use daily mean output from a five-member ensemble simulation of a comprehensive Earth system model under low- and high-CO2-emission scenarios to quantify historical and future changes in ocean acidity extreme events. When defining extremes relative to a fixed preindustrial baseline, the projected increase in mean [H+] causes the entire surface ocean to reach a near-permanent acidity extreme state by 2030 under both the low- and... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00676/78825/81141.pdf |
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