The atmospheric transformation and wet deposition of mercury were incorporated into a 3-dimensional regional scale Eulerian air quality model. Three Hg species were considered, elemental (Hg(0)), divalent (Hg(II)) and attachment to particles (Hg(p)). The wet transformation of Hg(0) was fully coupled with cloud process and concentrations of ozone and soot particles. The interaction between wet transformation of Hg(0) and direct scavenging of other mercury species was also modeled. Simulations were conducted over the northeast U.S. during a summer week and a winter week of 1997. The simulated Hg concentrations in precipitation were compared with concentrations measured at seven monitoring stations in Connecticut for the same period. The analysis of the modeling results also include the transformation and wet deposition of each mercury species by precipitation cloud, non-precipitation cloud, and fair weather cloud
Symposium on Interdisciplinary Issues in Atmospheric Chemistry