Model estimates of atmospheric deposition of sulfur and nitrogen compounds to Baikal Natural Territory based on observed concentration in air and presipitation

• I.S. Ilyin

  Yu. A. Izrael Institute of Global Climate and Ecology, 20B, Glebovskaya str., 107258, Moscow, Russian Federation

  Автор

• D.A. Galushin

  Yu. A. Izrael Institute of Global Climate and Ecology, 20B, Glebovskaya str., 107258, Moscow, Russian Federation

  Автор

• S.A Gromov

  Yu. A. Izrael Institute of Global Climate and Ecology, 20B, Glebovskaya str., 107258, Moscow, Russian Federation

  Автор

• E.S. Zhigacheva

  Yu. A. Izrael Institute of Global Climate and Ecology, 20B, Glebovskaya str., 107258, Moscow, Russian Federation

  Автор

Results of the model estimates of oxidized sulfur, oxidized and
reduced nitrogen total atmospheric deposition fluxes to the Baikal Natural Territory
(BNT) are presented. Measured data on concentrations in air and precipitation and
modelling of ecosystem-dependent dry deposition velocities were used.
Measurement data on the pollutant air concentrations were obtained at Listvyanka
monitoring site which has been working under the international EANET
monitoring programme since 2000. Ecosystem-dependent dry deposition fluxes
and their variability over twenty-year period were estimated following the
modelling approach practically developed in the EANET programme with the
guidelines and recommendations addressing to application of monitoring data. For
simulation of wet deposition the data on precipitation chemistry monitoring
stations located on the research area were used. Spatial distribution of total (wet
and dry) atmospheric deposition fluxes of sulfur and nitrogen across the BNT area
was evaluated for the conditions of 2020. Sulfur dry deposition to water, grassland
and coniferous forest in the Listvyanka area contributes around 50%, 67% and 85%
to its total deposition, respectively, on average. Contribution of oxidized nitrogen
dry deposition for water, grassland and coniferous forests amounts to 5%, 20% and
about 50%, respectively. The similar corresponding values for dry deposition of
reduced nitrogen were 50, 56 and 60%. Within the BNT domain the area-weighted
mean deposition flux to different land type areas is about 1300-1400 mg∙m-2∙yr-1
(sulfur), 200-270 mg∙m-2∙yr-1 (oxidized nitrogen) and 340-360 mg∙m-2∙yr-1
(reduced nitrogen), while mean deposition flux to the Lake Baikal water surface is
substantially lower.

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