Comparison of Vertically Integrated Fluxes of Atmospheric Water Vapor According to Satellite Radiothermovision, Radiosondes, and Reanalysis
| Autor: | A. P. Chernushich, A. V. Kuzmin, Victor Sterlyadkin, Eugene Sharkov, E. V. Pashinov, D. M. Ermakov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Science 0207 environmental engineering reanalysis satellite radiothermovision 02 engineering and technology radiosondes Atmospheric sciences 01 natural sciences Vertical integration law.invention Troposphere law Water cycle calculation of latent heat fluxes 020701 environmental engineering Physics::Atmospheric and Oceanic Physics 0105 earth and related environmental sciences Atmospheric water Advection advection of water vapor Radiosonde General Earth and Planetary Sciences Environmental science Satellite Water vapor |
| Zdroj: | Remote Sensing, Vol 13, Iss 1639, p 1639 (2021) |
| ISSN: | 2072-4292 |
| Popis: | The atmospheric advection of water vapor is one of the most important components of the planetary hydrological cycle. Radiosondes are a means for regular observations of water vapor fluxes. However, their data are sparse in space and time. A more complete picture is provided by reanalysis assimilating these data. However, a statistically representative check of the reanalysis estimates of the water vapor fluxes far from regularly operating weather stations is difficult. The previously proposed and developed method of satellite radiothermovision makes it possible to reconstruct the vertically integrated advective water vapor fluxes from satellite microwave radiometry. In this work, for the first time, the results of direct comparisons of long (5 year) time series of zonal vertically integrated daily water vapor fluxes based on the data of radiosondes, reanalysis, and satellite radiothermovision are performed and presented. It is shown that all the data series are statistically reliably correlated (at a confidence level of 0.995). The regression factor between the fluxes from reanalysis and satellite radiothermovision was close to 1, but with a noticeable bias (the latter were about 60 kg/(m·s) less on average). Grounds are given for the hypothesis that calculations based on satellite radiothermovision mainly characterize water vapor fluxes in the lower troposphere (up to heights of about 4 km). Its verification, as well as the analysis of the noted cases of violation of the correlation between the fluxes from satellite radiothermovision and reanalysis, requires further research. |
| Databáze: | OpenAIRE |
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