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Reflectance of Broken Cloud Fields: Simulation and Parameterization
Publisher: American Meteorological Society
Abstract: The transfer of solar irradiance in plane parallel and broken cloud fields is simulated using a Monte Carlo method. The angular distribution pattern of radiances exiting the cloud layer is studied with varying cloud ...
Cloud Detection from the Spaceborne POLDER Instrument and Validation against Surface Synoptic Observations
Publisher: American Meteorological Society
Abstract: This paper describes the cloud screening algorithms that have been developed for the processing of Polarization and Directionality of the Earth Reflectances (POLDER) measurements over land surfaces. Four tests are applied ...
Land Surface Pressure Estimate from Measurements in the Oxygen A Absorption Band
Publisher: American Meteorological Society
Abstract: The POLDER (polarization and directionality of the earth reflectances) instrument to be launched in 1996 carries two channels that cover the oxygen A absorption band (near IR). The authors investigate the possibility of ...
Horizontally Oriented Plates in Clouds
Publisher: American Meteorological Society
Abstract: Horizontally oriented plates in clouds generate a sharp specular reflectance signal in the glint direction, often referred to as ?subsun.? This signal (amplitude and width) may be used to analyze the relative area fraction ...
Evidence of Atmospheric Contamination on the Measurement of the Spectral Response of the GMS-5 Water Vapor Channel
Publisher: American Meteorological Society
Abstract: The GMS-5 geostationary satellite carries a channel centered at 6.7 ?m for the measurement of upper-tropospheric humidity. This channel?s spectral response shows structures that are similar to those shown by the atmospheric ...
Downwelling Longwave Irradiance at the Ocean Surface: An Assessment of In Situ Measurements and Parameterizations
Publisher: American Meteorological Society
Abstract: Two sets of ocean surface longwave irradiance measurements collected during the FASINEX and MILDEX experiments are analyzed for quality and variability studies. Using concomitant radiosonde data, the clear-sky contribution ...
Global Shortwave Energy Budget at the Earth's Surface from ERBE Observations
Publisher: American Meteorological Society
Abstract: A method is proposed to compute the net solar (shortwave) irradiance at the earth's surface from Earth Radiation Budget Experiment (ERBE) data in the S4 format. The S4 data are monthly averaged broadband planetary albedo ...