Other
Scientific paper
Sep 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3718809d&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 18, CiteID L18809
Other
3
Atmospheric Composition And Structure: Cloud/Radiation Interaction, Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Atmospheric Processes: Clouds And Aerosols, Atmospheric Processes: Radiative Processes, Atmospheric Processes: Remote Sensing
Scientific paper
Solar radiative transfer through a cloudy atmosphere is commonly computed assuming clouds to be one-dimensional, i.e., plane-parallel. Here we provide a global perspective on how often and with what degree oceanic water clouds may be considered plane-parallel by fusing multi-view-angle and multi-spectral satellite data. We show that the view-angular distribution of the retrieved reflectance, spherical albedo and cloud optical thickness measured at 1 km resolution are indistinguishable from plane-parallel clouds 24%, 25% and 79% of the time, respectively, at the 95% confidence level of our measurement method. These plane-parallel clouds occur most frequently within regions dominated by stratiform clouds under solar zenith angles <60°. For all other regions or sun-angles, the frequency in which clouds are indistinguishable from plane-parallel drops sharply to as low as a few percent. Our results provide a basis for interpreting space-time variability within many satellite-retrieved variables and reveal a need for continued efforts to handle three-dimensional radiative transfer in environmental modeling and monitoring systems.
Di Girolamo Larry
Liang Lusheng
Platnick Steven
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