Data/hora: 09/06/2024 09:46:54

Provedor de dados: 	5	
País: 	France	
Título: 	Advanced method for sea ice concentration retrieval from satellite microwave radiometer measurements at frequencies near 90 GHz	
Autores: 	Zabolotskikh, E.v.; Balashova, E.a.; Chapron, Bertrand.	
Data: 	2019	
Ano: 	2019	
Palavras-chave: 	Sea ice; Sea ice concentration; Arctic; Satellite passive microwave radiometers; Brightness temperatures; AMSR2; Polarization difference; Physical modeling.	
Resumo: 	An advanced method for sea ice concentration retrieval from satellite microwave radiometer measurements at frequencies near 90 GHz is presented. The method is based on the new approach for the determination of the tie points ― the polarization differences (PD) of the brightness temperatures (TB) of the ocean-atmosphere system (PDW) and the sea ice-atmosphere system microwave radiation (PDSI). The approach is based on the results of physical modeling of the sea ice – ocean – atmosphere TB and the analysis of the measurements of the Advanced Microwave Scanning Radiometer 2 (AMSR2) in the Arctic region. The TB simulation is carried out for the whole ranges of the Arctic atmospheric conditions and sea ice and ocean parameters. The method of sea ice concentration (SIC) retrieval uses PD in measurements on the vertical and horizontal polarization at the frequency of 89 GHz and the values of tie points over the ice-free sea surface and over the sea ice. The range of PDW and PDSI variability is analyzed basing on the AMSR2 measurement data and the results of TB model calculations. The advancement of the method as compared to those traditionally used is the use of variable PDW values depending on how far from the sea ice edge is the pixel for which C is estimated. The method was tested using the maps of the Norwegian Meteorological Institute (NMI) for the Northeren, Kara and Barents seas. The error of SIC estimation, calculated using the new method, turned out to be 4.2 %, which is almost two times lower than the error of the standard product of the University of Bremen, calculated using the same verification data set.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00660/77194/78613.pdf

DOI:10.21046/2070-7401-2019-16-4-233-243

https://archimer.ifremer.fr/doc/00660/77194/	
Editor: 	Space Research Institute RAS	
Formato: 	application/pdf	
Fonte: 	Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosaCurrent problems in remote sensing of the Earth from space (2411-0280) (Space Research Institute RAS), 2019 , Vol. 16 , N. 4 , P. 233-243	
Fonte: 	info:eu-repo/semantics/openAccess

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