12th Conference on Cloud Physics
12th Conference on Atmospheric Radiation


Retrieval of cloud optical properties from infrared hyper-spectral measurements: a new methodology based on a line-by-line multiple scattering code and measured particle size distributions

Tiziano Maestri, Space Science Engireering Center/ Univ. of Wisconsin, Madison, WI; and R. E. Holz and P. Antonelli

A new methodology to retrieve cloud optical properties using hyperspectral infrared measurements will be presented. The new method makes use of line-by-line multiple scattering simulations to retrieve spectrally resolved cloud optical depths. The retrieval requires knowledge of the clear sky profile and cloud boundaries. Comparing the spectral optical depths with a pre-computed optical depths database the cloud microphysical properties are retrieved. This database is generated from an ensemble of measured cloud particle size distributions and computed single scattering properties for a variety of ice crystal habits.

The full methodology will be applied to several case studies covering different cloudy sky conditions. A comparison with other cloud property retrieval methodologies is also performed. The work will be focused both on aircraft and satellite hyper-spectral measurements (i.e. Scanning High-resolution Interferometer Sounder and Atmospheric Infrared Sounder) with lidar and radar measurements to validate the retrieval results.

extended abstract  Extended Abstract (928K)

Joint Poster Session 2, Radiative Properties of Clouds (Joint with 12th Conference on Atmospheric Radiation & 12th Conference on Cloud Physics)
Wednesday, 12 July 2006, 5:00 PM-7:00 PM, Grand Terrace

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