Ice-sheet growth and high-latitudes sea-surface temperature

• Published in: Climate Dynamics
• Main Authors: Berger, André, Gallee, H., Li, XS., Dutrieux, A, Loutre, Marie-France
• Other Authors: UCL - SC/PHYS - Département de physique
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer Verlag 1996
• Subjects: Norwegian Sea; Ice Sheet; North Atlantic
• Online Access: http://hdl.handle.net/2078.1/47129; https://doi.org/10.1007/BF02346817

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 degrees 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 degrees 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.