Physics – Geophysics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112107p&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 12, CiteID L12107
Physics
Geophysics
29
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Global Change: Atmosphere (0315, 0325), History Of Geophysics: Atmospheric Sciences
Scientific paper
Using collocated measurements of aerosol radiative properties and radiative fluxes, aerosol radiative forcing is estimated at a tropical urban site in India, located between the sub-continent and the Indian Ocean Experiment [INDOEX] sites. Observed sun/sky radiance data are used to derive aerosol spectral optical depth, single scattering albedo [SSA], asymmetry parameter, precipitable water and total column ozone. These serve as inputs to a radiative transfer model, to estimate aerosol forcing at the surface, the top-of-the atmosphere [TOA] and the atmosphere. During the dry season of 2001 and 2002 [November-April], these were found to be -33, 0 and 33 Wm-2, respectively. Using measured radiative fluxes during different aerosol loading conditions yield a surface forcing of -31 Wm-2. The surface forcing efficiency as computed from the two independent methods is found to be -88 and -84 Wm-2, respectively, while mean SSA at 500 nm is found to be 0.81.
Devara C. S. P.
Pandithurai Govindan
Pinker Rachel T.
Takamura Tamio
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