Chemical composition of atmospheric precipitation in Moscow and the trends of its long-term changes
Abstract
The chemical composition of atmospheric precipitation for the Meteorological Observatory of Moscow University is analyzed basing on the monitoring of every event of wet atmospheric fallout for 1982 to 2017 period. The whole number of observations can be grouped into three periods, which are characterized by different acidity of precipitation, changes in mineralization and the predominance of certain ions. The 1980-1998 period is characterized by the most polluted atmospheric precipitation with high acidity; the 1999-2004 period - by almost complete absence of acid deposition and decrease in mineralization of precipitation. The latest period (2005-2017) is characterized by increasing frequency of acid fallouts, while the mineralization shows no changes despite a significant increase of chlorides in precipitation in recent years. The possible reasons for these trends are discussed. The average long-term pH value was 4,90±0,03 and the mineralization value was 17,1±1,0 mg/l.
Keywords
acid rains,
mineralization,
anion-cationic composition of atmospheric precipitation,
deicing reagents
Supporting agencies: The work was financially supported by the Russian Science Foundation (project № 18-17-00149)
About the Author
I. D. Eremina
Lomonosov Moscow State University
Russian Federation
Russian Federation
Faculty of Geography, Department of Meteorology and Climatology, Leading Research Scientist, PhD. in Chemistry
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Review
For citations:
Eremina I.D. Chemical composition of atmospheric precipitation in Moscow and the trends of its long-term changes. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2019;(3):3-10. (In Russ.)
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