Observational evidence of solar dimming: Offsetting surface warming over India
Article first published online: 10 NOV 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 21, November 2007
How to Cite
2007), Observational evidence of solar dimming: Offsetting surface warming over India, Geophys. Res. Lett., 34, L21810, doi:10.1029/2007GL031133., , , and (
- Issue published online: 10 NOV 2007
- Article first published online: 10 NOV 2007
- Manuscript Accepted: 15 OCT 2007
- Manuscript Revised: 27 SEP 2007
- Manuscript Received: 28 JUN 2007
- solar dimming;
- surface temperature;
 Monthly mean surface reaching solar radiation (S) measurements under all sky conditions have been evaluated for 12 stations, which are widely distributed over the Indian region, for the period 1981-2004. It is noteworthy that all the stations showed decline in S ranging from −0.17 to −1.44 W/m2 per year. The average solar dimming observed over India for the period 1981–2004 is ∼−0.86 W/m2 per year while during winter, pre-monsoon and monsoon seasons it is ∼−0.94, ∼−1.04 and ∼−0.74 W/m2 per year, respectively. Decadal monthly mean S for the two decades 1981–1990 and 1991–2000 showed strong decline during the second decade with an average reduction of 5% per two decades. Despite the drastic decrease in S, the all India averaged surface maximum and minimum air temperatures have been increasing. But, the change in increase in maximum temperature from the first decade to second decade is only marginal under the present situation of drastic increase in greenhouse gas emissions, while the increase in minimum temperature has been doubled.