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Results of measurements of optical thickness of clouds over the West Siberian Plain taken with the help of the MERIS spectrometer
onboard the European satellite ENVISAT are analyzed. The observational data for two summer periods of 2008–2009 are considered.
It is found that the distribution function of the clouds’ optical thickness averaged over the territory is best presented
as the sum of three logonormal distributions. The contribution from each of them to the total envelope, values of optical
thickness logarithms for mode centers, and values of variances are given. It is shown that the distribution parameters are
almost unchanged with conditional division of the plain’s territory into four zones. The total number of the studied cases
exceeds 106. 相似文献
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D. N. Troshkin N. N. Bezuglova M. V. Kabanov V. E. Pavlov K. I. Sokolov K. Yu. Sukovatov 《Izvestiya Atmospheric and Oceanic Physics》2017,53(9):918-923
The spatial distribution of the total water vapor in different climatic zones of the south of Western Siberia in summer of 2008–2011 is studied on the basis of Envisat data. The correlation analysis of the water-vapor time series from the Envisat data W and radiosonde observations w for the territory of Omsk aerological station show that the absolute values of W and w are linearly correlated with a coefficient of 0.77 (significance level p < 0.05). The distribution functions of the total water vapor are calculated based on the number of its measurements by Envisat for a cloudless sky of three zones with different physical properties of the underlying surface, in particular, steppes to the south of the Vasyugan Swamp and forests to the northeast of the Swamp. The distribution functions are bimodal; each mode follows the lognormal law. The parameters of these functions are given. 相似文献
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