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Regular version of the site

Article

Objective Analysis of the Structure of Three-Dimensional Atmospheric Fronts

Izvestiya - Atmospheric and Oceanic Physics. 2012. Vol. 48. No. 2. P. 152-168.
Bykov P. L., Gordin V. A.

A computational method for diagnosing threedimensional atmospheric fronts from temperature,
wind, and geopotential fields on a threedimensional 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 parti
cles 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 halfdegree 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.