DOI: 10.24411/1728-323X-2018-12078

Section

Physical geography and biogeography, soil geography and landscape geochemistry

Title

GEOCHEMICAL CONTENT OF PRECIPITATION IN FOREST-STEPPE LANDSCAPES OF KURSK BIOSPHERE STATION

Сontributors

T. M. Kuderina, Ph. D. (Geography), research scientist, This email address is being protected from spambots. You need JavaScript enabled to view it.;

V. N. Lunin, Ph. D. (Geography), head of KBS IG, RAS, This email address is being protected from spambots. You need JavaScript enabled to view it.;

S. B. Suslova, researcher, This email address is being protected from spambots. You need JavaScript enabled to view it., Institute of geography RAS, Moscow

Abstract

Geochemical variability of precipitation during the year was observed on the model territory of Kursk Biosphere station of the Institute of Geography of RAS (KBS). Snow at the end of accumulation and rainfall during the warm period of the year 2017 were sampled. Results showed that winter precipitation has very low mineralization, slightly acidic pH, and minimal concentrations of chemical elements. Alkalization of rainwater occurs in the spring-summer period during the plowing of agricultural landscapes. Backward trajectories of air masses (NOAA HYSPLIT MODEL) for days with rain showed potential pollution sources. Air masses of the western sector make the main contribution to the geochemistry of atmospheric precipitation. Predominant western transfer of air mass carries heavy metals in the landscapes: nickel, iron, cobalt, copper, zinc. Precipitation is an important income source of selenium and beryllium in forest-steppe landscapes. Variability of the chemical content of precipitation during the year can be an indicator of air pollution and provide significant anthropogenic influence on natural forest-steppe landscapes of the Kursk Biosphere Station.

Keywords

forest-steppe landscapes, precipitation, snow cover, mineralization, geochemical content, heavy metals

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