Ecological Systems and Devices Annotation << Back EVALUATION OF ATMOSPHERIC DRYDEPOSITION OF SULPHURAND NITROGEN COMPOUNDSIN THE PRIOKSKO-TERRASNY NATUREBIOSPHERE RESERVEWITH THE MEASUREMENTSAT THE EMEP STATION S.A. Gromov, E.S. Zhigacheva, D.D. Pokrovsky Acid deposition being studied and monitored since the beginning of 1980s still remains to be an actual environmental problem. Their removal from the atmosphere proceeds by not «acid rain» only but through «dry deposition» of gases and aerosols onto underlying surface also. The calculation of deposition fl uxes was done for sulfur and nitrogen compounds seemed to be major acidifying pollutants with the use of measurement datasets of EMEP Danki monitoring station in the Prioksko-Terrasny Reserve. The results obtained for the last 3years demonstrate the decreasing of dry deposition of all selected pollutants in 2016 except NO2. Through the comparison of estimated dry deposition fl ux with the wet only fall-out of those pollutants on the underlying surface for 2015 we found both of them are approximately equal for sulfur while the dry deposition of nitrogen is about half of its amount deposited with precipitation. Comparison of total atmospheric sulfur and nitrogen fl uxes with critical loads (CL) showed no exceedance of CL but total deposition amount of all nitrogen compounds reached the lower limit of N critical load thresholds for ecosystems in moderate Europe. Keywords: dry deposition; atmospheric precipitation; acidifi cation; acid precipitation. Contacts: E-mail: sergey.gromov@igce.ru Pp. 10-17.