Examining the Cloud Buffering under Smokeladen Conditions: a Case Study of the 2002 Yakutsk Wildfire Season

摘要

We use the fully coupled WRF-Chem-SMOKE model in conjunction with satellite observations to examine the impact of smoke and the response of a frontal system to smoke-induced changes in clouds and precipitation. We show that in the high CCN/low IN regime, the dynamic buffering feedback dominates because both warm rain and riming processes are suppressed by smoke. The onset of precipitation is delayed by about one day. In the high CCN/high IN regime, more snow water path (SWP) is formed to compensate for reduced rain water path (RWP), indicating the dominance of the mixed-phase cloud buffering feedback. The onset and total amount of daily precipitation over this region were only slightly affected; however, significant changes in precipitation pattern were found.