Relationship between solar net radiative fluxes at the top of the atmosphere and at the surface

Details Relationship between solar net radiative fluxes at the top of the atmosphere and at the surface Relationship between solar net radiative fluxes at the top of the atmosphere and at the surface

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jats...50.1122s&link_type=abstract

Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 50, no. 8, p. 1122-1132.

Physics

13

Radiant Flux Density, Solar Flux Density, Solar Radiation, Solar Terrestrial Interactions, Water Vapor, Aerosols, Atmospheric Attenuation, Cloud Physics

Scientific paper

This paper presents model calculations of the influence on solar absorption of water vapor, solar zenith angle, cloud-top altitude, and cloud optical thickness. The model results indicate a somewhat complex relation between the solar net fluxes at the surface and at the top of the atmosphere. It is pointed out that cloud altitude and optical depth have a large impact on solar atmospheric absorption; high clouds decrease solar absorption by the atmosphere whereas low clouds increase it. This difference between solar atmospheric absorption for low and high clouds increases with cloud optical depth. An intriguing result is that changes of total atmospheric absorption with cloud-top height are nearly completely compensated by corresponding changes in the net flux at the top of the atmosphere, thus leaving the surface solar net flux constant. Furthermore, this paper provides a very simple parameterization for estimating the clear-sky solar atmospheric absorption as a function of solar zenith angle and the vertically integrated water vapor content of the atmosphere.

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