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metadata.dc.type: | Artigo de Periódico |
Title: | Astronomical forcing of contrasting rainfall changes in tropical South America between 12,400 and 8800 cal yr BP |
Other Titles: | Quaternary Research |
Authors: | Martin, Louis Bertaux, Jacques Corrège, Thierry Ledru, Marie Pierre Mourguiart, Philippe Sifeddine, Abdelfettah Soubiès, François Wirrmann, Denis Suguio, Kenitiro Turcq, Bruno |
metadata.dc.creator: | Martin, Louis Bertaux, Jacques Corrège, Thierry Ledru, Marie Pierre Mourguiart, Philippe Sifeddine, Abdelfettah Soubiès, François Wirrmann, Denis Suguio, Kenitiro Turcq, Bruno |
Abstract: | 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. |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/8353 |
Issue Date: | 1997 |
Appears in Collections: | Artigo Publicado em Periódico (IGEO) |
Files in This Item:
File | Description | Size | Format | |
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1-s2.0-S0033589496918669-main.pdf Restricted Access | 427,3 kB | Adobe PDF | View/Open Request a copy |
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