Geophysical Model Function for the AMSR2 C-Band Wind Excess Emissivity at High Winds

Type Article
Date 2016-01
Language English
Author(s) Zabolotskikh Elizaveta V.1, Reul NicolasORCID2, Chapron Bertrand2
Affiliation(s) 1 : Russian State Hydrometeorol Univ, Satellite Oceanog Lab, St Petersburg 195196, Russia.
2 : Inst Francais Rech & Exploitat Mer, F-29280 Plouzane, France.
Source Ieee Geoscience And Remote Sensing Letters (1545-598X) (Ieee-inst Electrical Electronics Engineers Inc), 2016-01 , Vol. 13 , N. 1 , P. 78-81
DOI 10.1109/LGRS.2015.2497463
WOS© Times Cited 5
Keyword(s) Atmosphere, geophysical measurements, oceans, passive microwave remote sensing, tropical cyclones (TCs)
Abstract Measurements of the Advanced Microwave Scanning Radiometer 2 (AMSR2) onboard GCOM-W1 satellite at 6.925 and 7.3 GHz and both linear polarizations over tropical cyclones (TCs) during 2012 – 2014 are used to derive a new geophysical function relating the brightness temperature to the sea surface wind speed (SWS) in extreme conditions. . Similar sensitivity to SWS at close C-band frequencies allowed to correct for the atmospheric contributions to the microwave radiance and estimate the brightness temperature (TB) at the surface under the TCs, combining theoretical modeling and measured TB analyses. Estimated oceanic TBs were regressed against the wind speeds from the Best Track Archive to derive the new geophysical model function (GMF) for the wind speed excess emissivity at AMSR2 C-band microwave frequencies.
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