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| Capron, E.; Landais, A.; Chappellaz, J.; Schilt, A.; Buiron, D.; Dahl-jensen, D.; Johnsen, S. J.; Jouzel, J.; Lemieux-dudon, B.; Loulergue, L.; Leuenberger, M.; Masson-delmotte, V.; Meyer, H.; Oerter, H.; Stenni, B.. |
| Since its discovery in Greenland ice cores, the millennial scale climatic variability of the last glacial period has been increasingly documented at all latitudes with studies focusing mainly on Marine Isotopic Stage 3 (MIS 3; 28-60 thousand of years before present, hereafter ka) and characterized by short Dansgaard-Oeschger (DO) events. Recent and new results obtained on the EPICA and NorthGRIP ice cores now precisely describe the rapid variations of Antarctic and Greenland temperature during MIS 5 (73.5-123 ka), a time period corresponding to relatively high sea level. The results display a succession of abrupt events associated with long Greenland InterStadial phases (GIS) enabling us to highlight a sub-millennial scale climatic variability depicted by... |
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| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00231/34255/32634.pdf |
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| Uemura, R.; Masson-delmotte, V.; Jouzel, J.; Landais, A.; Motoyama, H.; Stenni, B.. |
| A single isotope ratio (delta D or delta O-18) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oceanic moisture source to a precipitation site. The temperature changes at the oceanic moisture source (delta T-source) and at the precipitation site (delta T-site) can be retrieved by using deuterium-excess (d) data. A new d record from Dome Fuji, Antarctica spanning the past 360 000 yr is presented and compared with records from Vostok and EPICA Dome C ice cores. In previous studies, to retrieve delta T-source and delta T-site information, different linear... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00139/25062/23172.pdf |
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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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