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| Mathiot, P.; Goosse, H.; Crosta, X.; Stenni, B.; Braida, M.; Renssen, H.; Van Meerbeeck, C. J.; Masson-delmotte, V.; Mairesse, A.; Dubinkina, S.. |
| From 10 to 8 ka BP (thousand years before present), paleoclimate records show an atmospheric and oceanic cooling in the high latitudes of the Southern Hemisphere. During this interval, temperatures estimated from proxy data decrease by 0.8 degrees C over Antarctica and 1.2 degrees C over the Southern Ocean. In order to study the causes of this cooling, simulations covering the early Holocene have been performed with the climate model of intermediate complexity LOVECLIM constrained to follow the signal recorded in climate proxies using a data assimilation method based on a particle filtering approach. The selected proxies represent oceanic and atmospheric surface temperature in the Southern Hemisphere derived from terrestrial, marine and glaciological... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00181/29203/27584.pdf |
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| Loutre, M. F.; Fichefet, T.; Goosse, H.; Huybrechts, P.; Goelzer, H.; Capron, E.. |
| The last interglacial (LIG), also identified to the Eemian in Europe, began at approximately 130 kyr BP and ended at about 115 kyr BP (before present). More and more proxy-based reconstructions of the LIG climate are becoming more available even though they remain sparse. The major climate forcings during the LIG are rather well known and therefore models can be tested against paleoclimatic data sets and then used to better understand the climate of the LIG. However, models are displaying a large range of responses, being sometimes contradictory between them or with the reconstructed data. Here we would like to investigate causes of these differences. We focus on a single climate model, LOVECLIM, and we perform transient simulations over the LIG, starting... |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00291/40215/38716.pdf |
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| Mairesse, A.; Goosse, H.; Mathiot, P.; Wanner, H.; Dubinkina, S.. |
| The mid-Holocene (6 kyr BP; thousand years before present) is a key period to study the consistency between model results and proxy-based reconstruction data as it corresponds to a standard test for models and a reasonable number of proxy-based records is available. Taking advantage of this relatively large amount of information, we have compared a compilation of 50 air and sea surface temperature reconstructions with the results of three simulations performed with general circulation models and one carried out with LOVECLIM, a model of intermediate complexity. The conclusions derived from this analysis confirm that models and data agree on the large-scale spatial pattern but the models underestimate the magnitude of some observed changes and that large... |
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| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00504/61609/65542.pdf |
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