Objective analysis of the structure of three-dimensional atmospheric fronts |
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Authors: | Email author" target="_blank">Ph?L?BykovEmail author V?A?Gordin |
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Institution: | 1.Moscow State University,Moscow,Russia;2.Hydrometeorological Centre of Russia,Moscow,Russia;3.National Research University-Higher School of Economics,Moscow,Russia |
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Abstract: | A computational method for diagnosing three-dimensional atmospheric fronts from temperature, wind, and geopotential fields
on a three-dimensional regular grid is proposed. The criterion, which serves for the diagnosis of atmospheric fronts, is discussed.
The weights of the input information about the mentioned fields are optimized based on the maximal difference between the
correlation functions for (a) pairs of particles separated by the front and (b) pairs from one synoptic mass. These weights
were different for different baric levels. The correlation functions and the optimization of weights were estimated on the
basis of the archive of fields of the NCEP objective analysis on the half-degree latitude-longitude grid and data from aerological
observations. The results of numerical experiments on the construction of atmospheric fronts are presented. Applying the described
method to fields predicted for a term of up to 36 h showed that errors in the prognostic models introduce a relatively weak
distortion into the geometry of atmospheric fronts. |
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Keywords: | |
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