Retrieval of effective microphysical properties of clouds: A wave cloud case study

Details Retrieval of effective microphysical properties of clouds: A wave cloud case study Retrieval of effective microphysical properties of clouds: A wave cloud case study

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.1121a&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 8, p. 1121-1124

Physics

9

Meteorology And Atmospheric Dynamics: Remote Sensing, Atmospheric Composition And Structure: Cloud Physics And Chemistry, Global Change: Remote Sensing, Meteorology And Atmospheric Dynamics: Radiative Processes

Scientific paper

One of the important objectives of the SUbsonic aircraft: Contrail and Cloud Effects Special Study (SUCCESS) field campaign data analysis is to investigate retrieving cloud microphysical properties using remote sensing observations. This paper presents the results of an infrared based retrieval of effective particle radius Re using brightness temperature observations near 8.5, 11 and 12μm. The retrieval method relies on comparing 8.5-11 and 11-12μm observed brightness temperature differences to theoretical simulations. During SUCCESS, conducted in April-May 1996 out of Salina KS, the MODIS Airborne Simulator (MAS) on the NASA ER-2 made observations of contrails, cirrus and mountain lee wave clouds. Observations indicate that contrail and cirrus clouds are distinguishable by their radiative properties. Retrieval of Re for the lee wave cloud case on 2 May agrees with in situ observations from probes mounted on a NASA DC-8 aircraft, validating the infrared retrieval. The addition of the 8.5μm information to the Re retrieval greatly enhances the sensitivity of the retrieval at small particle sizes (<10μm).

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