Relative contributions to surface shortwave irradiance over China: A new index of potential radiative forcing

Details Relative contributions to surface shortwave irradiance over China: A new index of potential radiative forcing Relative contributions to surface shortwave irradiance over China: A new index of potential radiative forcing

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3517809k&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 17, CiteID L17809

Physics

Optics

Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Atmospheric Composition And Structure: Cloud/Radiation Interaction, Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Cloud Optics

Scientific paper

The contributions of atmospheric factors to surface shortwave irradiance (S) variability was investigated, using radiative transfer calculations to examine all sky (both cloud-free and cloudy) conditions. We defined the sensitivities of S to differential increases from given values of cloud, aerosol, and water vapor as potential radiative forcing (PRF). Thus, the expected change in S due to one factor would be the product of the PRF and the change in that factor. Geographical features of the PRF were described over China in January and July, and then the PRF was applied to evaluate the relative contributions of related factors to S variability over Jinan (the central-eastern China) during 1984 and 1990. Although some shortcomings were pointed out, the usefulness of the PRF was confirmed for determining the relative contributions. In particular, to use accurate aerosol absorption properties was suggested to be crucial for quantitative radiation budget estimates.

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