Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (4) Autor Chapron, Bertrand (4) Zabolotskikh, E.v. (3) Balashova, E.a. (1) Mitnik, Leonid (1) Reul, Nicolas (1) Zabolotskikh, Elizaveta (1) Zhivotovskaia‎, M.a. (1) Mais... Palavra-chave AMSR2 (4) Arctic (3) Brightness temperatures (2) Physical modeling (2) Sea ice (2) Sea surface wind speed (2) Brightness temperature modeling (1) Extreme weather conditions (1) Geophysical model functions (1) Hurricanes (1) Microwave radiation (1) Polarization difference (1) Rain rate (1) Satellite microwave radiometers (1) Satellite passive microwave (1) Satellite passive microwave radiometers (1) Satellite products (1) Sea ice concentration (1) Mais... Tipo do documento Text (4) Ano 2019 (3) 2015 (1) País France (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Advanced method for sea ice concentration retrieval from satellite microwave radiometer measurements at frequencies near 90 GHz ArchiMer Zabolotskikh, E.v.; Balashova, E.a.; Chapron, Bertrand. 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... Tipo: Text Palavras-chave: Sea ice; Sea ice concentration; Arctic; Satellite passive microwave radiometers; Brightness temperatures; AMSR2; Polarization difference; Physical modeling. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00660/77194/78613.pdf Spurious Arctic sea ice identification by satellite microwave radiometers under extreme weather conditions ArchiMer Zhivotovskaia‎, M.a.; Zabolotskikh, E.v.; Chapron, Bertrand. The appearance of spurious sea ice concentration (SSIC) areas in sea ice concentration (SIC) products was studied under extreme weather conditions associated with the development of polar lows (PLs) and extratropical cyclones (ECs). The SIC products are based on measurements of the Advanced Microwave Scanning Radiometer 2 (AMSR2). The database of the PLs and ECs in the Arctic was created for the period 2015–2018 and consists of optical and radar images of the ocean surface and sea ice maps of the Norwegian Meteorological Institute (NMI) and the Arctic and Antarctic Research Institute (AARI). Two satellite products were analyzed: daily average SIC, calculated with the ARTIST Sea Ice algorithm (ASI) and provided by the University of Bremen, and swath SIC of... Tipo: Text Palavras-chave: Sea ice; Arctic; AMSR2; Satellite products; Extreme weather conditions. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00660/77187/78618.pdf 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 Geophysical model functions for cold water microwave radiation dependency on wind speed in K and Ka range at an incidence angle of 55° ArchiMer Zabolotskikh, E.v.; Chapron, Bertrand. Geophysical model functions (GMFs) of the ocean microwave radiation dependence on wind speed at the frequencies of K and Ka range for an incidence angle of 55° are derived using the measurements of the satellite microwave radiometer Advanced Microwave Scanning Radiometer 2 (AMSR2) over open Arctic ocean at the sea surface temperatures (SST), not exceeding 10 °C. To estimate ocean radiation coefficients, surface microwave radiation was calculated using physical modeling of the ocean – atmosphere system brightness temperature. The simulation results made it possible to estimate surface radiation at 18.7, 23.8 and 36.5 GHz on the vertical and horizontal polarization with known atmospheric parameters, based on the ERA-Interim reanalysis data. These estimates... Tipo: Text Palavras-chave: Microwave radiation; Geophysical model functions; Sea surface wind speed; Arctic; Satellite microwave radiometers; Brightness temperatures; AMSR2; Physical modeling. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00660/77193/78614.pdf Registros recuperados: 4 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco