ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA

A direct radiative transfer model, 478 radiosondes complimented by the cloud liquid water content profiles and the underlying surface temperatures and emissivities were used to simulate the brightness temperatures T Bs over the Marginal Ice Zone at ADEOS-II AMSR and Aqua AMSR-E frequencies. The prec...

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Autores principales: Mitnik,Maia L., Mitnik,Leonid M.
Lenguaje:English
Publicado: Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300015
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spelling oai:scielo:S0717-653820040003000152005-05-16ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATAMitnik,Maia L.Mitnik,Leonid M.A direct radiative transfer model, 478 radiosondes complimented by the cloud liquid water content profiles and the underlying surface temperatures and emissivities were used to simulate the brightness temperatures T Bs over the Marginal Ice Zone at ADEOS-II AMSR and Aqua AMSR-E frequencies. The precipitable water V varied from 0.63 to 18.5kg/m², the total cloud liquid water content Q<=0.25kg/m² and SST£1°C. The mean experimental values of emissivity and its fluctuations for several types of the first-year ice at ice temperature of 263 to 271K were used in a model. The sea surface emissivity was computed taking into account wind action. 10 values of ice concentration C uniformly distributed from 0.0 to 1.0 were selected for each radiosonde. The radiometer noises of 0.5K were added to the modeled T Bs. Standard regression techniques were applied to retrieve V, Q and C from the simulated T Bs with vertical and horizontal polarization at 18.7, 23.8 and 36.5GHz. The retrieval errors increase from »0.5 to »1.7kg/m² for V and from »0.02 to »0.06 kg/m² for Q with the increase of C from 0.0-0.3 to 0.7-1.0. The algorithms were used to retrieve V, Q and C in the Okhotsk Sea from the T Bs measured by AMSR-Einfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300015en10.4067/S0717-65382004000300015
institution Scielo Chile
collection Scielo Chile
language English
description A direct radiative transfer model, 478 radiosondes complimented by the cloud liquid water content profiles and the underlying surface temperatures and emissivities were used to simulate the brightness temperatures T Bs over the Marginal Ice Zone at ADEOS-II AMSR and Aqua AMSR-E frequencies. The precipitable water V varied from 0.63 to 18.5kg/m², the total cloud liquid water content Q<=0.25kg/m² and SST£1°C. The mean experimental values of emissivity and its fluctuations for several types of the first-year ice at ice temperature of 263 to 271K were used in a model. The sea surface emissivity was computed taking into account wind action. 10 values of ice concentration C uniformly distributed from 0.0 to 1.0 were selected for each radiosonde. The radiometer noises of 0.5K were added to the modeled T Bs. Standard regression techniques were applied to retrieve V, Q and C from the simulated T Bs with vertical and horizontal polarization at 18.7, 23.8 and 36.5GHz. The retrieval errors increase from »0.5 to »1.7kg/m² for V and from »0.02 to »0.06 kg/m² for Q with the increase of C from 0.0-0.3 to 0.7-1.0. The algorithms were used to retrieve V, Q and C in the Okhotsk Sea from the T Bs measured by AMSR-E
author Mitnik,Maia L.
Mitnik,Leonid M.
spellingShingle Mitnik,Maia L.
Mitnik,Leonid M.
ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA
author_facet Mitnik,Maia L.
Mitnik,Leonid M.
author_sort Mitnik,Maia L.
title ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA
title_short ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA
title_full ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA
title_fullStr ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA
title_full_unstemmed ATMOSPHERIC PARAMETERS OVER THE MARGINAL ICE ZONE RETREIVAL FROM ANSR/AMSR-E DATA
title_sort atmospheric parameters over the marginal ice zone retreival from ansr/amsr-e data
publisher Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate 2004
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300015
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