Martin Louis, Bertaux Jacques, Corrège Thierry, Ledru Marie-Pierre, Mourguiart Philippe, Sifeddine Abdelfettah, Soubiès François, Wirrmann Denis, Suguio K., Turcq Bruno. (1997). Astronomical forcing of contrasting rainfall changes in tropical South America between 12,400 and 8800 cal yr B.P.. Quaternary Research, 47 (1), p. 117-122.
Titre du document
Astronomical forcing of contrasting rainfall changes in tropical South America between 12,400 and 8800 cal yr B.P.
Année de publication
1997
Auteurs
Martin Louis, Bertaux Jacques, Corrège Thierry, Ledru Marie-Pierre, Mourguiart Philippe, Sifeddine Abdelfettah, Soubiès François, Wirrmann Denis, Suguio K., Turcq Bruno
Source
Quaternary Research, 1997,
47 (1), p. 117-122
Today, precipitation over tropical South America is largely controlled by the seasonal movements of the Inter-Tropical Convergence Zone (ITCZ). During the summer, the ITCZ is shifted southward due to the warming of the continent. Paleoclimate data from southeastern Amazonia and the central Andes indicate that these two areas evolved similarly during the last 30,000 yr. However, between 12,400 and 8800 cal yr B.P., eastern Amazonia received substantial moisture whereas the Bolivian Altiplano was arid. This suggests that the ITCZ during summer was then farther north than it is today. (Résumé d'auteur)
Plan de classement
Géologie du quaternaire [064GEOQUA]
Descripteurs
QUATERNAIRE ; PALEOCLIMAT ; ZONE DE CONVERGENCE INTERTROPICALE
Description Géographique
AMERIQUE DU SUD ; ZONE TROPICALE
Localisation
Fonds IRD [F B010012844] ;
Bondy
Identifiant IRD
fdi:010012844
