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Provedor de dados:  ArchiMer
País:  France
Título:  Late Quaternary insolation forcing on total organic carbon and C-37 alkenone variations in the Arabian Sea
Autores:  Budziak, D
Schneider, Rr
Rostek, F
Muller, Pj
Bard, E
Wefer, G
Data:  2000-06
Ano:  2000
Palavras-chave:  Indian Ocean
Marine organic chemistry
Upwelling and convergences
Resumo:  We here present records of total organic carbon (TOC) and C-37 alkenones, used as indicators for past primary productivity, from the western (WAS) and eastern Arabian Sea (EAS). New data from an open ocean site of the WAS upwelling area are compared with similar records from Ocean Drilling Program (ODP) Site 723 from the continental margin off Oman and MD 900963 from the EAS. These records together with other proxies used to reconstruct upwelling intensity, indicate periods of high productivity in tune with precessional forcing. On the basis of their phase relationship to boreal summer insolation they can be divided into three groups: in the WAS differences between monsoonal proxies (1) and productivity (2) document a combined signal of moderate SW monsoon winds and of strengthened and prolonged NE monsoon winds, whereas in the EAS phasing indicates maximum productivity (3) at times of stronger NE monsoon winds associated with precession-related maxima in ice volume.
Tipo:  Text
Idioma:  Inglês

Editor:  Amer Geophysical Union
Formato:  application/pdf
Fonte:  Paleoceanography (0883-8305) (Amer Geophysical Union), 2000-06 , Vol. 15 , N. 3 , P. 307-321
Direitos:  Copyright 2000 by the American Geophysical Union.


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