| Title | Sudden changes in a glacial world [Changements abrupts dans un monde glaciaire] |
| Author | Labeyrie, L.; Jouzel, J.; Lévi, C.; Cortijo, E. |
| Author Affil | Labeyrie, L., Centre National de la Recherche Scientifique, Laboratoire des Sciences du Climat et de l'Environnement, Gif- sur-Yvette, France. Other: Université Versailles-St-Quentin, France |
| Source | Paléoclimatologie--Palaeoclimatology, edited by A. Berger and J. Duplessy. Comptes Rendus - Académie des Sciences. Géoscience, 336(7-8), p.721-732, . Publisher: Elsevier, Paris, France. ISSN: 1631- 0713 |
| Publication Date | Jun. 2004 |
| Notes | In French with English summary. 73 refs. GeoRef Acc. No: 285217. CRREL Acc. No: 62005322 |
| Index Terms | geochemistry; isotopes; oxygen; paleoclimatology; Antarctica--Antarctic ice sheet; Greenland--Greenland ice sheet; Antarctic ice sheet; Antarctica; Arctic region; Cenozoic; cycles; Dansgaard-Oeschger cycles; Foraminifera; glacial environment; Greenland; Greenland ice sheet; Heinrich events; ice cores; Invertebrata; isotope ratios; microfossils; O-18/O-16; paleo- oceanography; Protista; Quaternary; reconstruction; stable isotopes; thermohaline circulation; world ocean; World Ocean Circulation Experiment |
| Abstract | The most characteristic records of the millennial variability of climate during the last glacial period may be separated into two classes of signals: Greenland and Antarctic. The Greenland type is found over the whole North American and Euro-Asian continental blocks. Continental cooling associated with the maximum ice sheet extension, and resulting surges on the marine margins have affected the whole latitude range, with a probable strong albedo feedback due to winter snow cover. At the opposite, the surface temperature of tropical oceans did not change as much, which created large seasonal meandering of the Intertropical Convergence Zone (ITCZ), and facilitated meridional atmospheric vapor transport toward cold continents, and heat transfer in particular to the Southern Hemisphere. The rapid growth of ice sheets facilitated periodic surges and decreases in meridional overturning circulation. We propse that the major difference in the characteristics of the "Greenland" and "Antarctic" classes of climate variability result mostly from the difference in continent/ocean distribution in both hemispheres. To cite this article: L. Labeyrie et al., C. R. Geoscience 336 (2004). |
| URL | http://hdl.handle.net/10.1016/j.crte.2003.12.016 |
| Publication Type | journal article |
| Record ID | 84262 |