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Possible solar control on primary production along the Indian west coast on decadal to centennial timescale

DRS at CSIR-National Institute of Oceanography

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Title Possible solar control on primary production along the Indian west coast on decadal to centennial timescale
 
Creator Kurian, S.
Agnihotri, R.
Borole, D.V.
Naqvi, S.W.A.
Ferreira, A.M.
Vale, C.
 
Subject biogeochemical cycle
primary production
solar power
biomarkers
 
Description Using multiple geochemical proxies including specific biomarkers (dinosterol, phytol, stigmasterol and beta-sitosterol) measured in a high-sedimentation rate core collected from the inner shelf (depth approx. 45 m) off Goa (India). Surface productivity is reconstructed, which is mainly controlled by the monsoon upwelling in this region, during the last ca. 700 a. Surface productivity appears to have varied in tandem with the Konkan–Goa rainfall and sunspot activity during the instrumental period (last 250 a). The productivity proxies also covary with the total solar irradiance reconstructed for the period beyond the instrumental era, within the considerable uncertainty of the age model. This suggests that solar forcing may control coastal upwelling intensity and biological productivity in the eastern Arabian Sea on decadal to centennial timescales. During the late Anthropocene (last ca. 50 a), steep increases in all four biomarkers indicate greatly enhanced productivity in response to high solar irradiance as well as anthropogenic inputs of nutrients
 
Date 2009-04-08T10:32:22Z
2009-04-08T10:32:22Z
2009
 
Type Journal Article
 
Identifier Journal of Quaternary Science, vol.24(2); 109-116
http://drs.nio.org/drs/handle/2264/2616
 
Language en
 
Rights An edited version of this paper was published by John Wiley. This paper is for R & D pupose and Copyright [2009] John Wiley.
 
Publisher John Wiley