Aerosol-induced albedo change - Measurement and modeling of an incident

Details Aerosol-induced albedo change - Measurement and modeling of an incident Aerosol-induced albedo change - Measurement and modeling of an incident

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jats...36.1587r&link_type=abstract

Journal of the Atmospheric Sciences, vol. 36, Aug. 1979, p. 1587-1608.

Physics

Optics

5

Aerosols, Albedo, Atmospheric Models, Atmospheric Optics, Climate, Refractivity, Atmospheric Effects, Atmospheric Refraction, Bibliographies, Data Acquisition, Earth Albedo, Graphs (Charts), Mathematical Models, Tables (Data)

Scientific paper

An aerosol-induced change in the atmosphere-plus-surface albedo, and the use of simultaneous aerosol measurements to calculate an expected albedo change for comparison with the albedo measurements are presented. An aerosol optical model for the day of the incident based on assumed refractive indices is used in a two-stream radiative calculation to compute the time-dependent aerosol-layer albedo. Aerosol-plus-surface albedos are computed by changing solar zenith angle and the diffuseness of surface reflectivity, and the aerosol model is applied to yield a calculated time-dependent atmosphere-plus-surface albedo that agrees with the measurements, provided an aerosol refractive index of 1.50 to 0.01 is assumed. This refractive index value is in accord with the aerosol backscatter-to-extinction ratios measured simultaneously by the lidar and sunphotometer. The analysis is considered significant because it provides a practical methodology for incorporating measured properties of aerosol layers into efficient albedo-change calculations and could be applied to more persistent aerosol layers.

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