Aerosol microphysics over a tropical coastal station inferred from the spectral dependence of Angstrom wavelength exponent and inversion of spectral aerosol optical depths

Details Aerosol microphysics over a tropical coastal station inferred from the spectral dependence of Angstrom wavelength exponent and inversion of spectral aerosol optical depths Aerosol microphysics over a tropical coastal station inferred from the spectral dependence of Angstrom wavelength exponent and inversion of spectral aerosol optical depths

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71.1846b&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 17-18, p. 1846-1857.

Physics

2

Aerosol Optical Depth, Angstrom Exponent, Size Distribution, Aerosol Microphysics

Scientific paper

Six years of spectral aerosol optical depth (AOD) measurements have been analyzed from a tropical coastal site, Trivandrum (8.55°N, 76.9°E, 3 m msl) to infer on the seasonal changes in the microphysical properties of columnar aerosols, by examining the derivatives of the Angstrom wavelength exponent ([alpha]) in the wavelength domain ([alpha]'[lambda]) as well as in AOD domain ([alpha]'[tau]) and by retrieving the columnar size distribution by numerical inversion of the AODs. The inference of the changes in the aerosol microphysics drawn from the features of the derivatives [alpha]'[lambda] and [alpha]'[tau] is consistent with the pattern revealed by the aerosol properties obtained from the columnar size distributions retrieved from the AOD spectra as well as from the surface measurements of mass-size distributions, which are supported by the back-trajectory cluster analysis and the results of chemical species analysis.

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