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Winter precipitation variability over European Russia in different types of fronts originated over Arctic, Atlantic and Mediterranean regions

Atmospheric Research
Publication Date
DOI: 10.1016/0169-8095(94)90087-6


Abstract On the basis of radar investigation, convective ( I⩾0.3 mm/h) to widespread ( I⩽0.3 mm/h) precipitation contribution ratios, into the total amount of precipitation, are determined, for winter fronts. The quantitative characteristics of the variability of snowfall intensity are given. It has been found that 90% of the precipitation area which belongs to the western trajectory cyclones as well as northern, north-western trajectory cyclones is covered by widespread and weak solid widespread (I<0.2 mm/h) precipitation. In the southern and southwestern cyclones trajectory only 30–40% of the precipitation area is covered by widespread precipitation. The rest 60–70% of the area is covered by convective precipitation. Distribution density analysis of precipitation for 27 fronts has shown that there exist two modes: first in the widespread range and second in the convective range. Widespread precipitation amount and area are mainly contributed to by a 0.1–0.2 mm/h intensity. Convective precipitation amount and area are mainly contributed to by a 0.5–1.0 mm/h intensity. It has also been found that a relative contribution of convective and widespread precipitation into the total amount of snowfall depends on the type of front.

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