New Possibilities for Geophysical Parameter Retrievals Opened by GCOM-W1 AMSR2

Type Article
Date 2015
Language English
Author(s) Zabolotskikh Elizaveta1, Mitnik Leonid3, Reul NicolasORCID2, Chapron Bertrand2
Affiliation(s) 1 : RSHU, Satellite Oceanog Lab, St Petersburg, Russia.
2 : Inst Francais Rech & Exploitat MER, Ctr Brest, F-29280 Plouzane, France
3 : Russian Acad Sci, Far Eastern Branch, POI FEB RAS, VI Ilichev Pacif Oceanol Inst, Vladivostok 690022, Russia
Meeting 13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad. Pasadena, CA, MAR 24-27, 2014
Source IEEE journal of selected topics in applied earth observations and remote sensing (1939-1404) (Ieee), 2015 , Vol. 99 , P. 1-14
DOI 10.1109/JSTARS.2015.2416514
Keyword(s) satellite passive microwave, AMSR2, rain rate, sea surface wind speed, hurricanes, brightness temperature modeling
Abstract A new approach to retrieve sea surface wind speed (SWS) in tropical cyclones (TCs) from the Advanced Microwave Scanning Radiometer 2 (AMSR2) data is presented. Analysis of all six AMSR2 C- and X-band channel measurements over TCs is shown to efficiently help to separate the rain contribution. Corrected measurements at 6.9 and 10.65 GHz are then used to retrieve the SWS. Spatial and temporal collocation of AMSR2 and tropical rain measurement mission (TRMM) microwave instrument (TMI) data is then further used to empirically relate TMI rain rate (RR) product to RR estimates from AMSR2 in hurricanes. SWS estimates are validated with measurements from the stepped frequency microwave radiometer (SFMR). As further tested, more than 100 North Atlantic and North Pacific TCs are analyzed for the 2012–2014 period. Despite few particular cases, most SWS fields are in a very good agreement with TC center data on maximum wind speeds, radii of storm, and hurricane winds. As also compared, very high consistency between AMSR2 and L-band SMOS wind speed estimates are obtained, especially for the super typhoon Haiyan, to prove the high potential of AMSR2 measurements in TCs.
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