FEATURES OF HOMOGENEOUS DOMAINS DISTRIBUTION IN FIELDS OF HYDROMETEOROLOGICAL CHARACTERISTICS OVER THE NORTHERN ATLANTIC IN THE COLD PERIOD
In order to investigate horizontal distribution of hydro-meteorological characteristics, statistical analysis techniques, including multidimensional analysis (for example, factor, cluster ones, etc.), are usually applied. These techniques allow for obtaining not only fields of one or another characteristic by means of plotting appropriate isolines, but determining whole homogeneous areas with the characteristic representative point, which helps to compress information essentially and reveal boundaries of the characteristic distribution in the entire spatial assembly. In the paper, zoning schemes for fields of air temperature and specific humidity at 700 mb over the Northern Atlantic, obtained with the use of the Universal Cluster Iterative method, are proposed. The given clusterization schemes have been verified from both physical and statistical points of view. It is shown that the distribution of the said hydro-meteorological characteristics over the Northern Atlantic is of zonal type. General features and differences in the distribution of air temperature and specific humidity fields have been determined. Variability analysis of homogeneous areas boundaries, averaged values of representative vectors, variances, and standard deviations for future time steps allows for identifying the characteristics of climate variability by the example of the fields of the meteorological characteristics examined.