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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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| 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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