Remote sensing of cirrus cloud parameters based on a 0.63-3.7 μm radiance correlation technique applied to AVHRR data

Details Remote sensing of cirrus cloud parameters based on a 0.63-3.7 μm radiance correlation technique applied to AVHRR data Remote sensing of cirrus cloud parameters based on a 0.63-3.7 μm radiance correlation technique applied to AVHRR data

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.2437o&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 16, p. 2437-2440

Physics

9

Meteorology And Atmospheric Dynamics: Remote Sensing

Scientific paper

Using the data gathered from the Advanced Very High Resolution Radiometer (AVHRR) 0.63 and 3.7 μm channels, an algorithm for the inference of cirrus cloud optical depth and mean effective size has been developed for the first time. This scheme is based on the correlation between the 3.7 μm (total) and 0.63 μm radiances that is constructed from radiative transfer calculations involving ice crystal clouds. Application of the algorithm to AVHRR channels has been performed by using data sets that were collected during the First ISCCP Regional Experiment, Phase II, Cirrus Intensive Field Observation (FIRE-II-IFO; November-December 1991) at Coffeyville, Kansas. For validation, the in-situ data collected by the balloon-borne replicator and airborne 2-D probes that were collocated with AVHRR pixels were carefully analyzed for five cases involving single and multiple cirrus cloud layers. We demonstrate that the retrieved cirrus cloud optical depths and mean effective sizes compare reasonably well with those determined from the in-situ analyses.

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