31 January 2001 Remote sensing of cirrus cloud properties in the far infrared
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Abstract
This study investigates the prospect of retrieving ice cloud properties using the far IR part of the outgoing longwave radiation spectrum. Ice optical properties in the far IR are such that ice clouds not only absorb but also scatter radiation. Thus, the far IR offers unique remote sensing opportunities for ice particle size and shape retrieval. Calculations of top of the atmosphere brightness temperatures are made at high spectral resolution for a variety of atmospheric profiles, cloud heights, particle size, and ice contents, and integrated over narrow spectral bands. We define two bands where the scattering effect is particularly obvious and compare their signals to the 11 micrometers band signal. The results indicate that the far IR is more sensitive to changes in particle size for optically thick ice clouds than is the IR window.
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Catherine Naud, Catherine Naud, Jaqueline E. Russell, Jaqueline E. Russell, John E. Harries, John E. Harries, } "Remote sensing of cirrus cloud properties in the far infrared", Proc. SPIE 4168, Remote Sensing of Clouds and the Atmosphere V, (31 January 2001); doi: 10.1117/12.413868; https://doi.org/10.1117/12.413868
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