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Modeling the influence of Greenland ice sheet melting on the Atlantic meridional overturning circulation during the next millennia

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Driesschaert, Emmanuelle [UCL] Fichefet, Thierry [UCL] Goosse, Hugues [UCL] Huybrechts, P. Janssens, I. Brovkin, Victor [UCL] Weber, Shlomo [UCL]

A three-dimensional Earth system model of intermediate complexity including a dynamic ice sheet component has been used to investigate the long-term evolution of the Greenland ice sheet and its effects on the Atlantic meridional overturning circulation (AMOC) in response to a range of stabilized anthropogenic forcings. Our results suggest that the Greenland ice sheet volume should experience a significant decrease in the future. For a radiative forcing exceeding 7.5 W m(-2), the modeled ice sheet melts away within 3000 years. A number of feedbacks operate during this deglaciation, implying a strong nonlinear relationship between the radiative forcing and the melting rate. Only in the most extreme scenarios considered, the freshwater flux from Greenland into the surrounding oceans ( of ca. 0.1 Sv during a few centuries) induces a noticeable weakening of the AMOC in the model.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2007
Language Anglais
Journal information "Geophysical Research Letters" - Vol. 34, no. 10 (2007)
Peer reviewed yes
Publisher Amer Geophysical Union (Washington)
issn 0094-8276
e-issn 1944-8007
Publication status Publié
Affiliations UCL - SC/PHYS - Département de physique
UCL - SST/ELI/ELIC - Earth & Climate
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Bibliographic reference Driesschaert, Emmanuelle ; Fichefet, Thierry ; Goosse, Hugues ; Huybrechts, P. ; Janssens, I. ; et. al. Modeling the influence of Greenland ice sheet melting on the Atlantic meridional overturning circulation during the next millennia. In: Geophysical Research Letters, Vol. 34, no. 10 (2007)
Permanent URL http://hdl.handle.net/2078.1/37599