NEW MODEL FOR CORRECTION OF MEASURED PRECIPITATION AND ITS USE IN RUSSIAN POLAR REGIONS

E. G. Bogdanova, V. S. Golubev, B. M. Il'in, and I. V. Dragomilova

A new model is proposed for correction of precipitation gauge data that takes into account all basic systematic measurement errors of the Tretyakov precipitation gauge. An algorithm is proposed on the basis of which a program of correction of daily precipitation has been developed. The results are given of correction of daily precipitation measured at 16 stations of the Arctic coast and Russian Polar regions from Murmansk to Cape Schmidt for the period from the mid 1950s to 1990. In the course of correction, all systematic errors of the precipitation measurement by the Tretyakov gauge were taken into account: neglect of wind effect, total effect of wetting, evaporation, and condensation on the inner surface of a corrector of the precipitation gauge, and the effect of false precipitation from blizzards. The results obtained are summarized and presented in the form of standard long-term mean characteristics (monthly and annual precipitation, intra-annual distribution). Differences between the characteristics obtained from measured and corrected precipitation are estimated.