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Antarctic ice-sheet melting provides negative feedbacks on future climate warming
Swingedouw, D.; Fichefet, T.; Huybrechts, P.; Goosse, H.; Driesschaert, E.; Loutre, M.-F. (2008). Antarctic ice-sheet melting provides negative feedbacks on future climate warming. Geophys. Res. Lett. 35(17). https://dx.doi.org/10.1029/2008GL034410
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007
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| Auteurs | | Top |
- Swingedouw, D.
- Fichefet, T.
- Huybrechts, P.
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- Goosse, H.
- Driesschaert, E.
- Loutre, M.-F.
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| Abstract |
We show by using a three-dimensional climate model, which includes a comprehensive representation of polar ice sheets, that on centennial to millennial time scales Antarctic Ice Sheet (AIS) can melt and moderate warming in the Southern Hemisphere, by up to 10°C regionally, in a 4 × CO2 scenario. This behaviour stems from the formation of a cold halocline in the Southern Ocean, which limits sea-ice cover retreat under global warming and increases surface albedo, reducing local surface warming. Furthermore, we show that AIS melting, by decreasing Antarctic Bottom Water formation, restrains the weakening of the Atlantic meridional overturning circulation, which is a new illustration of the effect of the bi-polar oceanic seesaw. Consequently, it appears that AIS melting strongly interacts with climate and ocean circulation globally. It is therefore necessary to account for this coupling in future climate and sea-level rise scenarios. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
