Modified Ångström Exponent for the Characterization of Submicrometer Aerosols
Applied Optics, Vol. 40, Issue 15, pp. 2368-2375 (2001)
http://dx.doi.org/10.1364/AO.40.002368
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Abstract
The classical Ångström exponent is an operationally robust optical parameter that contains size information on all optically active aerosols in the field of view of a sunphotometer. Assuming that the optical effects of a typical (radius) size distribution can be approximated by separate submicrometer and supermicrometer components, we show that one can exploit the spectral curvature information in the measured optical depth to permit a direct estimation of a fine-mode (submicrometer) Ångström exponent (αf) as well as the optical fraction of fine-mode particles (η). Simple expressions that enable the estimation of these parameters are presented and tested by use of simulations and measurements.
© 2001 Optical Society of America
OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(280.1100) Remote sensing and sensors : Aerosol detection
Citation
Norm T. O’Neill, Oleg Dubovik, and Tom F. Eck, "Modified Ångström Exponent for the Characterization of Submicrometer Aerosols," Appl. Opt. 40, 2368-2375 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-15-2368
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