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A Night-Rain Delineation Algorithm for Infrared Satellite Data Based on Microphysical Considerations

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  • 1 Institute of Earth Science, Hebrew University of Jerusalem, Jerusalem, Israel
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Abstract

Information about the microstructure and precipitation potential of cloud revealed by the brightness temperature difference between a thermal IR channel (11 μm) and a mid-IR channel (3.7 μm) at nighttime is implemented into a precipitation delineation algorithm. The algorithm is simple to implement and uses data available from almost all of the operational and research satellites. The delineation algorithm performs well also in cases of warm clouds over land for which passive microwave algorithms fail.

Corresponding author address: Itamar M. Lensky, Institute of Earth Science, Hebrew University of Jerusalem, Jerusalem 91904, Israel. itamarl@shum.huji.ac.il

Abstract

Information about the microstructure and precipitation potential of cloud revealed by the brightness temperature difference between a thermal IR channel (11 μm) and a mid-IR channel (3.7 μm) at nighttime is implemented into a precipitation delineation algorithm. The algorithm is simple to implement and uses data available from almost all of the operational and research satellites. The delineation algorithm performs well also in cases of warm clouds over land for which passive microwave algorithms fail.

Corresponding author address: Itamar M. Lensky, Institute of Earth Science, Hebrew University of Jerusalem, Jerusalem 91904, Israel. itamarl@shum.huji.ac.il

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