Estimation of the total wet sulfur and nitrogen deposition as a part of pollution balance in the south of the Russian Far East based on the monitoring dataтезисы доклада
Аннотация:One of the main goals in the regional biogeochemical research of East Asia is to evaluate the state
of acid deposition and the related pollution within EANET region (EANET, 2019). In the south of the
Russian Far East there are two networks developed to monitor the content of acidic substances in
atmospheric fall-out. The first one is the Russian national precipitation chemistry stations
operated for more than 30 years, and the second is the international atmospheric monitoring sites
supervised by EANET and WMO-GAW (Yearbook, 2019). We calculate the total deposition of
airborne sulfur and nitrogen in a large region to evaluate their atmospheric balances under the
transboundary influence. The present study focuses on the development and application of the
spatial interpolation method to estimate wet deposition fluxes based on the monitoring data for
2013-2018. On the first step of the algorithm, we analyze the correlation of pollution monitoring
results between network stations and estimate the maximum radius of representativeness for
each station. On the second step, we interpolate the precipitation chemistry data for the set of
meteorological stations located in the region under the study and calculate the wet deposition
fluxes of sulfur and nitrogen for these sites. The flux values obtained are further interpolated for
the regular grid of 10-km by 10-km cells within the region under the study. Finally, the total wet
sulfur and nitrogen deposition for the region is a sum of deposition fluxes calculated for each cell.
Additionally, we compared the data obtained with the correspondent flux calculated on the basis
of the national snow cover chemistry network for the same region and period.