Publications des scientifiques de l'IRD

Montade V., Kageyama M., Combourieu-Nebout N., Ledru Marie-Pierre, Michel E., Siani G., Kissel C. (2015). Teleconnection between the Intertropical Convergence Zone and southern westerly winds throughout the last deglaciation. Geology, 43 (8), p. 735-738. ISSN 0091-7613.

Titre du document
Teleconnection between the Intertropical Convergence Zone and southern westerly winds throughout the last deglaciation
Année de publication
2015
Type de document
Article référencé dans le Web of Science WOS:000359014600020
Auteurs
Montade V., Kageyama M., Combourieu-Nebout N., Ledru Marie-Pierre, Michel E., Siani G., Kissel C.
Source
Geology, 2015, 43 (8), p. 735-738 ISSN 0091-7613
Comparison of environmental changes between northeastern Brazil and western Patagonia during the last deglaciation reveals concomitant trends in moisture from the Intertropical Convergence Zone (ITCZ) and southern westerly winds (SWW). The data confirm an atmospheric teleconnection between the ITCZ and SWW, associated with Atlantic Meridional Overturning Circulation (AMOC) variations. When the AMOC decreases, both the ITCZ and the SWW shift southward; they shift northward when the AMOC increases. Climate simulations in which the AMOC is made to vary agree with this general pattern. Additional experiments performed with an atmosphere-only model show that the tropical Atlantic is a key area in promoting relationships between the AMOC, ITCZ, and SWW. Our data show that this mechanism, which transfers climate changes between low and middle latitudes to high latitudes in the Southern Hemisphere, acted throughout the abrupt climatic events of the last deglaciation.
Plan de classement
Sciences du milieu [021] ; Limnologie physique / Océanographie physique [032] ; Géologie et formations superficielles [064]
Description Géographique
BRESIL ; PATAGONIE ; AMERIQUE DU SUD ; ATLANTIQUE
Localisation
Fonds IRD [F B010064883]
Identifiant IRD
fdi:010064883
Contact