A recent cloud climatology is employed to estimate the tropospheric liquid water burden as a function of latitude. This burden, coupled with a rate expression for aqueous oxidation of SO2 in atmospheric hydrometeors allows estimation of the aqueous sink for SO2 in the troposphere. This sink appears to be larger than previously assumed. Comparison with estimates of the tropospheric SO2 sink due to homogeneous gas-phase oxidation suggests that the aqueous sink is at least as large as the gas-phase sink and that the latter is quite possibly of secondary importance.