Contrasting intrainterstadial climatic evolution between high and middle North Atlantic latitudes: A close-up of Greenland Interstadials 8 and 12

Type Article
Date 2009-04-29
Language English
Author(s) Sanchez Goni Maria Fernanda1, Landais Amaelle2, Cacho Isabel3, Duprat Josette4, Rossignol Linda4
Affiliation(s) 1 : Univ Bordeaux 1, CNRS, EPHE, EPOC,UMR5805, F-33405 Talence, France.
2 : IPSL, CNRS, CEA, Lab Sci Climat & Environm,UMR1572, F-91191 Gif Sur Yvette, France.
3 : Univ Barcelona, Fac Geol, Dept Estratig Paleontol & Geociencies Marines, GRC,Geociencies Marines, E-08028 Barcelona, Spain.
4 : Univ Bordeaux 1, CNRS, EPHE, EPOC,UMR5805, F-33405 Talence, France.
Source Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2009-04-29 , Vol. 10 , N. 4 , P. 1-16
DOI 10.1029/2008GC002369
WOS© Times Cited 20
Keyword(s) Greenland interstadial, Iberia, Dansgaard-Oeschger variability, North Atlantic, precipitation source, pollen
Abstract Three highly resolved pollen and sea surface temperature records from the Iberian margin (36-42 degrees N) reveal the local evolution of vegetation and climate associated with the rapid climatic variability of marine isotope stage 3. The comparison of the climate at these midlatitudes with delta D and d excess from Greenland ice cores shows that the north-south climatic gradient underwent strong variations during the long Greenland Interstadials (GIs) 8 and 12. After the Northern Hemispheric rapid warming at the Greenland Stadial (GS)-GI transition, the trend during the first part of the GI is a Greenland cooling and an Iberian warming. This increase of the North Atlantic climatic gradient led to moisture transportation to Greenland from midlatitudes (lightest d excess) and to a drying episode in Iberia. The subsequent temperature decrease in Greenland and Iberia associated with the precipitation increase in the latter region occurred when the major source of Greenland precipitation shifted to lower latitudes (d excess increase).
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Sanchez Goni Maria Fernanda, Landais Amaelle, Cacho Isabel, Duprat Josette, Rossignol Linda (2009). Contrasting intrainterstadial climatic evolution between high and middle North Atlantic latitudes: A close-up of Greenland Interstadials 8 and 12. Geochemistry Geophysics Geosystems, 10(4), 1-16. Publisher's official version : https://doi.org/10.1029/2008GC002369 , Open Access version : https://archimer.ifremer.fr/doc/00218/32912/