Mapping of base cation deposition in South Korea

Deposition of non-seasalt base cations (Ca²⁺ + Mg²⁺ + K⁺) in South Korea was mapped for 1994 to 1997 on a 11 × 14 km grid using the so-called inferential modeling technique. It is found that the annual mean wet deposition of non-seasalt base cations is about 290 eq ha^-1 yr^-1 with a maximum of 470 eq ha^-1 yr^-1 and a minimum of 120 eq ha^-1 yr^-1 while the annual mean dry deposition is about 130 eq ha^-1 yr-1 with a maximum of 240 eq ha^-1 yr^-1 and a minimum 70 eq ha^-1 yr^-1. The annual mean total deposition of non-seasalt Ca²⁺ + Mg²⁺ + K⁺ is found to be about 420 eq ha^-1 yr^-1 with the predominant range of 400 eq ha^-1 yr^-1 to 550 eq ha^-1 yr^-1 that occupies more than 45% of total deposition of non-seasalt base cations and dry deposition constitutes on average 30% of the total base cation deposition. About 30% of the annual total deposition of sulfur is found counteracted by deposition of non-seasalt base cations over South Korea.