Values shown are estimates of the 1/e lifetime of Hg(II) (left) and Hg(p) (right), based on the instantaneous hour-by-hour decreases in the Hg(II) or Hg(p) mass in the system, distributed initially throughout the entire three-dimensional model domain at a constant mixing ratio. As with the estimates for Hg(0): (a) all chemical transformation processes were turned off for simulations examining wet and dry deposition processes; and (b) all wet and dry deposition processes were disabled during simulations investigating specific chemical transformation processes. Interpretation of the box plot and symbol elements are as described in Figure 1.