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| Svensson, A.; Andersen, K. K.; Bigler, M.; Clausen, H. B.; Dahl-jensen, D.; Davies, S. M.; Johnsen, S. J.; Muscheler, R.; Parrenin, F.; Rasmussen, S. O.; Roethlisberger, R.; Seierstad, I.; Steffensen, J. P.; Vinther, B. M.. |
| The Greenland Ice Core Chronology 2005 (GICC05) is a time scale based on annual layer counting of high-resolution records from Greenland ice cores. Whereas the Holocene part of the time scale is based on various records from the DYE-3, the GRIP, and the NorthGRIP ice cores, the glacial part is solely based on NorthGRIP records. Here we present an 18 ka extension of the time scale such that GICC05 continuously covers the past 60 ka. The new section of the time scale places the onset of Greenland Interstadial 12 (GI-12) at 46.9 +/- 1.0 ka b2k (before year AD 2000), the North Atlantic Ash Zone II layer in GI-15 at 55.4 +/- 1.2 ka b2k, and the onset of GI-17 at 59.4 +/- 1.3 ka b2k. The error estimates are derived from the accumulated number of uncertain annual... |
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| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00238/34893/33135.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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