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An Updated Geophysical Model for AMSR-E and SSMIS Brightness Temperature Simulations over Oceans ArchiMer
Zabolotskikh, Elizaveta; Mitnik, Leonid; Chapron, Bertrand.
In this study, we considered the geophysical model for microwave brightness temperature (BT) simulation for the Atmosphere-Ocean System under non-precipitating conditions. The model is presented as a combination of atmospheric absorption and ocean emission models. We validated this model for two satellite instruments-for Advanced Microwave Sounding Radiometer-Earth Observing System (AMSR-E) onboard Aqua satellite and for Special Sensor Microwave Imager/Sounder (SSMIS) onboard F16 satellite of Defense Meteorological Satellite Program (DMSP) series. We compared simulated BT values with satellite BT measurements for different combinations of various water vapor and oxygen absorption models and wind induced ocean emission models. A dataset of clear sky...
Tipo: Text Palavras-chave: Calibration; Geophysical model; Numerical simulation; SSMIS; AMSR-E; Satellite passive microwave.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00190/30101/28628.pdf
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New approach for severe marine weather study using satellite passive microwave sensing ArchiMer
Zabolotskikh, Elizaveta V.; Mitnik, Leonid M.; Chapron, Bertrand.
A methodology, based on model simulations and neural networks inversion, is proposed to jointly retrieve sea surface wind speed, sea surface temperature, atmospheric water vapor content, cloud liquid water content, and total atmospheric absorption at 10.65GHz using Advanced Microwave Scanning Radiometer 2 measurements. In particular, estimation of the total atmospheric absorption at 10.65GHz, which can be done with high accuracy due to the not so strong influence of liquid water and especially water vapor, helps to refine a new filter to considerably reduce masking ocean areas for severe weather systems, characterized by high wind speeds and moderate atmospheric absorption, appropriate for studying winter extratropical cyclone and polar low systems. A...
Tipo: Text Palavras-chave: Satellite passive microwave; Weather filter; High winds; AMSR-2; Atmospheric absorption.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00166/27752/25943.pdf
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New Possibilities for Geophysical Parameter Retrievals Opened by GCOM-W1 AMSR2 ArchiMer
Zabolotskikh, Elizaveta; Mitnik, Leonid; Reul, Nicolas; Chapron, Bertrand.
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...
Tipo: Text Palavras-chave: Satellite passive microwave; AMSR2; Rain rate; Sea surface wind speed; Hurricanes; Brightness temperature modeling.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00270/38104/36255.pdf
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