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| Mitnik,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... |
| Tipo: Journal article |
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| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300015 |
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| Mitnik,Leonid M.; Mitnik,Maia L.; Dubina,Vyacheslav A.. |
| Observations carried out by the Aqua AMSR-E (Advanced Microwave Scanning Radiometer), ADEOS-II AMSR and Envisat ASAR (Advanced Synthetic Aperture Radar) have been used to study the distribution of total water vapor content V, total cloud liquid water content Q, precipitation R and surface wind W in marine weather systems over the Northwestern Pacific Ocean. V, Q and W were retrieved from the measured brightness temperatures T B(n) with vertical and horizontal polarization at AMSR frequencies n with using of the developed algorithms. Strong gradients in the surface wind field existing at scales of a few kilometers and less are dramatically smoothed in AMSR data retrievals as follows from a comparison with Envisat ASAR images. Joint analysis of the... |
| Tipo: Journal article |
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| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300014 |
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