Detection of intense ice precipitation with GPM/DPR

Detection of intense ice precipitation with GPM/DPR AbstractDetection of ice precipitation is one of the objectives in the Global Precipitation Measurement (GPM) mission. The Dual-Frequency Precipitation Radar (DPR) can provide precipitation echoes at two different frequencies that may enable us to differentiate solid precipitation echoes from liquid precipitation echoes. A simple algorithm that flags the pixels that contain intense ice precipitation above the height of –10°C is implemented in the version 5 DPR products. In the inner swath of DPR measurements in which both Kuand Ka-band radar echoes are available, the measured dual-frequency ratio (DFRm) together with the measured radar reflectivity factor is used to judge the existence of intense ice precipitation. Comparisons of the flagged pixels with surface measurements show that the algorithm correctly identifies relatively intense ice precipitation regions. The global distribution of the flagged pixels indicates an interesting difference between land and ocean, in particular in the distribution of ice precipitation that reaches the surface. The flag is also expected to be useful for improving precipitation retrieval algorithms by microwave radiometers. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Atmospheric and Oceanic Technology American Meteorological Society

Detection of intense ice precipitation with GPM/DPR

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0426
D.O.I.
10.1175/JTECH-D-17-0120.1
Publisher site
See Article on Publisher Site

Abstract

AbstractDetection of ice precipitation is one of the objectives in the Global Precipitation Measurement (GPM) mission. The Dual-Frequency Precipitation Radar (DPR) can provide precipitation echoes at two different frequencies that may enable us to differentiate solid precipitation echoes from liquid precipitation echoes. A simple algorithm that flags the pixels that contain intense ice precipitation above the height of –10°C is implemented in the version 5 DPR products. In the inner swath of DPR measurements in which both Kuand Ka-band radar echoes are available, the measured dual-frequency ratio (DFRm) together with the measured radar reflectivity factor is used to judge the existence of intense ice precipitation. Comparisons of the flagged pixels with surface measurements show that the algorithm correctly identifies relatively intense ice precipitation regions. The global distribution of the flagged pixels indicates an interesting difference between land and ocean, in particular in the distribution of ice precipitation that reaches the surface. The flag is also expected to be useful for improving precipitation retrieval algorithms by microwave radiometers.

Journal

Journal of Atmospheric and Oceanic TechnologyAmerican Meteorological Society

Published: Jan 24, 2018

References

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