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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Composition and Structure: Pollution: urban and regional
  • Global Change: Regional climate change

Abstract

Single scattering albedo of aerosols over the central India: Implications for the regional aerosol radiative forcing

Dilip Ganguly

Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India

H. Gadhavi

Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India

A. Jayaraman

Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India

T. A. Rajesh

Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India

A. Misra

Space and Atmospheric Sciences Division, Physical Research Laboratory, Ahmedabad, India

Extensive measurements of various aerosol parameters including single scattering albedo (SSA) were made at various locations over the central Indian region during February 2004 to study their impact on the regional aerosol radiative forcing. An overall increase in the measured value of SSA is noticed (0.75 to 0.9) over the period of this campaign, indicating unequal changes in source strength or removal processes of absorbing and scattering types of aerosols. Diurnally averaged value of direct SW radiative forcing for the region is in the range of −15 to −40 W/m2 at the surface, about 15% lower compared to that over the Bay of Bengal region and 22% higher than over the Arabian Sea. TOA forcing is in the range of +0.7 to −11 W/m2, about 50% lower compared to both these regions. This results in a heating rate of nearly 0.8 K/day for the first 2km in the atmosphere.

Received 24 June 2005; accepted 18 August 2005; published 17 September 2005.

Citation: Ganguly, D., H. Gadhavi, A. Jayaraman, T. A. Rajesh, and A. Misra (2005), Single scattering albedo of aerosols over the central India: Implications for the regional aerosol radiative forcing, Geophys. Res. Lett., 32, L18803, doi:10.1029/2005GL023903.

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