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Direct atmosphere opacity observations from CALIPSO provide new constraints on cloud-radiation interactions
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2017
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Source: Journal of Geophysical Research: Atmospheres, 122(2), 1066-1085
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Journal Title:Journal of Geophysical Research: Atmospheres
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Description:The spaceborne lidar CALIPSO (Cloud-Aerosol Lidar and Infrared Path finder Satellite Observation) directly measures atmospheric opacity. In 8 years of CALIPSO observations, we find that 69% of vertical pro files penetrate through the complete atmosphere. The remaining 31% do not reach the surface, due to opaque clouds. The global mean altitude of full attenuation of the lidar beam (z_opaque) is 3.2 km, butthere are large regional variations in this altitude. Of relevance to cloud-climate studies, the annual zonal mean longwave cloud radiative effect and annual zonal mean z_opaque weighted by opaque cloud cover are highly correlated (0.94). The annual zonal mean shortwave cloud radiative effect and annual zonal meanopaque cloud cover are also correlated ( /C00.95). The new diagnostics introduced here are implemented within a simulator framework to enable scale-aware and de finition-aware evaluation of the LMDZ5B global
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Source:Journal of Geophysical Research: Atmospheres, 122(2), 1066-1085
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ISSN:2169-897X
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Rights Information:Other
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