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Read Full Article (file size: 262972 bytes) Cited by
GEOPHYSICAL RESEARCH LETTERS,
VOL. 34,
L21810,
doi:10.1029/2007GL031133,
2007
Observational evidence of solar dimming: Offsetting surface warming over India
B. Padma Kumari
Indian Institute of Tropical Meteorology, Pune, India
A. L. Londhe
Indian Institute of Tropical Meteorology, Pune, India
S. Daniel
India Meteorological Department, Pune, India
D. B. Jadhav
Indian Institute of Tropical Meteorology, Pune, India
Abstract
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.
Received 28
June
2007;
accepted 15
October
2007;
published 10
November
2007.
Keywords: solar dimming;
surface temperature;
India.
Index Terms: 1605 Global Change: Abrupt/rapid climate change (4901, 8408); 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801, 4906); 0360 Atmospheric Composition and Structure: Radiation: transmission and scattering; 5739 Planetary Sciences: Fluid Planets: Meteorology (3346); 4930 Paleoceanography: Greenhouse gases.
Read Full Article (file size: 262972 bytes) Cited by
Citation: Padma Kumari, B., A. L. Londhe, S. Daniel, and D. B. Jadhav
(2007),
Observational evidence of solar dimming: Offsetting surface warming over India,
Geophys. Res. Lett.,
34,
L21810,
doi:10.1029/2007GL031133.
Copyright 2007 by the American Geophysical Union.
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