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(Article of periodic en Anglais - 1997)

Document title

Astronomical forcing of contrasting rainfall changes in tropical South America between 12,400 and 8800 cal yr B.P.

Authors(s) and Affiliation(s)

MARTIN L. (1) ; BERTAUX J. ; CORRÈGE T. ; LEDRU M.-P. ; MOURGUIART P. ; SIFEDDINE A. ; SOUBIÈS F. ; WIRRMANN D. ; SUGUIO K. ; TURCQ B. ;
(1) ORSTOM, PPG, IG/UFBA, Salvador, BRESIL

Abstract

Today, precipitation over tropical South America is largelly controlled by the seasonal movements of the Inter-Tropical Convergence Zone (ITCZ). In this paper, the AA. reconstruct the rainfall regimes from 2 sedimentary records in South America that exhibit contrasting characteristics (southeastern Amazonia and the northern part of the Bolivian Altiplano). The paleoclimatic reconstructions are compared with present-day climatic conditions in the 2 regions and with other tropical South American records. The results suggest that the ITCZ during summer was farther north than it is today

Source

Article of periodic

published at : Quaternary research / ISSN 0033-5894 / CODEN QRESAV

Editor : Elsevier, San Diego, CA - ETATS-UNIS (1970)

Millesime : 1997, vol. 47, no1 [pp. 117-122]

Bibliographic references : 30 ref.

Collation : Illustration ;

Language

Anglais

INIST-CNRS, Cote INIST : 15739

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 1997.
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