Estimation of sulfur deposition in South Korea

Dry and wet depositions of sulfur have been estimated using the routinely a vailable meteorological data at 70 sites, air-monitored data at 27 sites an d upper air soundings made daily twice (0000 and 1200 UTC) at three station s over South Korea for 4 yr from 1994 to 1997. The average annual total dry deposition and wet deposition of sulfur in South Korea are found to be 3 a nd 1.7 t km(-2) yr(-1), respectively. The ratio of dry-to-wet deposition of sulfur is found to vary with season with a maximum value of 6.6 in winter to a minimum value of 0.5 in summer in association with both precipitation amount and SO2 concentration. The maximum of annual total sulfur deposition exceeding 10 t km(-2) yr(-1) occurs in the southeastern part of Korea wher e big cities and industrial complexes are located, suggesting the importanc e of SO2 emission for deposition of sulfur, (C) 2000 Elsevier Science Ltd. All rights reserved.