BALANCES OF OXIDIZED SULFUR AND NITROGEN OVER THE FORMER SOVIET-UNIONTERRITORY

Detailed sulfur and nitrogen emission inventories have recently been c onstructed for the former Soviet Union (FSU) territory, with 1x1 degre e resolution (Ryaboshapko et al., 1996, Report CM-89, International Me teorological Institute in Stockholm, Department of Meteorology, Stockh olm University). In this study, observations of sulfur and nitrogen co mpounds in air and in precipitation during 1980-1990 were compiled and deposition fluxes calculated. A three-dimensional (3D) global tracer transport model (MOGUNTIA) of oxidized sulfur and nitrogen was used to check the consistency between the observations and the emission data and to calculate the balances of these species for the FSU area. Distr ibutions of the wet deposition fluxes of these species are presented a nd compared with observations. Important gaps in knowledge are identif ied and recommendations are made to improve the monitoring network for the former Soviet Union. (C) 1998 Elsevier Science Ltd. All rights re served.