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Temporal derivative of Total Solar Irradiance and anomalous Indian summer monsoon: An empirical evidence for a Sun–climate connection

DRS at CSIR-National Institute of Oceanography

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Title Temporal derivative of Total Solar Irradiance and anomalous Indian summer monsoon: An empirical evidence for a Sun–climate connection
 
Creator Agnihotri, R.
Dutta, K.
Soon, W.
 
Subject Total Solar Irradiance
Tropical precipitation
Indian monsoon
solar radiation
 
Description Identifying the pattern of natural climate variability is of immense importance to delineate the effects of anthropogenic climate changes. Global and regional climates are suspected to vary, in unison or with delays, with the Total Solar Irradiance (TSI) at decadal to centennial timescales. Here we show that the Indian summer monsoon rainfall correlates well with the temporal derivative of TSI on multi-decadal timescales. This linkage between the temporal derivative of TSI and the Indian summer monsoon is tested and corroborated both for the instrumental period (1871–2006) and for the last approx. 300 years using a speleothem delta sup(18)O record representing rainfall in southwestern India. Our analyses indicate that anomalous dry periods of the Indian monsoon are mostly coincident with negative TSI derivative. This study thus demonstrates the potential of 'TSI derivative' as an important indicator of natural monsoon variability on an interdecadal timescale.
 
Date 2011-08-23T09:36:46Z
2011-08-23T09:36:46Z
2011
 
Type Journal Article
 
Identifier Journal of Atmospheric and Solar-Terrestrial Physics, vol.73; 2011; 1980-1987
http://drs.nio.org/drs/handle/2264/3902
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2011] Elsevier
 
Publisher Elsevier