Ice-sheet growth and high-latitudes sea-surface temperature |
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| Authors: | A Berger H Gallée X S Li A Dutrieux M F Loutre |
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| Institution: | 1. Institut d'Astronomie et de Géophysique G. Lemaitre, 2, Chemin du Cyclotron, Université catholique de Louvain, B-1348, Louvain-la-Neuve, Belgium
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| Abstract: | The response of the LLN 2-D climate model to the insolation and CO2 forcings during the Eemian interglacial is compared to reconstructions obtained from deep-sea cores drilled in the Norwegian
Sea and in the North Atlantic. Both reconstructions and modeling results show a decrease of sea-surface temperature (SST)
in the higher latitudes (70–75 °N zonal belt for the model and the Norwegian Sea for the proxy records), associated with a
more moderate cooling at lower latitudes (50–55 °N and North Atlantic), at the middle of isotopic substage 5e, several millenia
before the beginning of continental ice-sheet growth. Such a comparison between the simulated SST and ice volume of the Northern
Hemisphere has been extended to the whole last glacial-interglacial cycle. The influence of the insolation forcing on SST
and the shortcomings of the model due to its zonal character are discussed.
Received: 6 July 1995/Accepted: 19 December 1995 |
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