The ionic composition of atmospheric precipitation in the south of East Siberia
V.E. Pavlov1, I.V. Khvostov1, O.G. Netsvetaeva2
1Institute for Water and Environmental Problems of the Siberian Branch of the RAS, 656038, Barnaul, 1, Molodezhnaya str. IWEP SB RAS
pavlov@iwep.ru
2Limnological Institute of the Siberian Branch of the RAS, 3, Ulan-Batorskaya str., 664033, Irkutsk, Russia
r431@lin.irk.ru
Keywords: precipitation, ionic composition, long-term monitoring
Abstract
This paper presents the results of statistical analysis of concentrations of ten ions (NO2–, HCO3–, SO42–, NO3–, CL–, Na+, K+, Ca2+, Mg2+ and NH4+) measured in atmospheric precipitation of the Baikal region for 12 years. Strong diurnal variations (in some cases up to two orders of magnitude) are recordet. The calculation results of smoothed average values are indicative of seasonal variations of all mentioned above ionic concentrations: their content in winter is 2–3 times higher than in summer. In most cases, the unified hierarchy of mean ionic composition of atmospheric precipitation sampled in Irkutsk, Listvyanka settlement, and at the mountain observatory Mondy (2005 m asl) is noted. This paper contains tabular data on the geometric mean concentrations of ten ions and the corresponding variances.
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