四川盆地不同区域城市降水过程对PM2.5清除作用分析

林丹, 郭晓梅, 王维佳

Analysis on scavenging effect of precipitation processes on PM2.5 in different cities of Sichuan Basin

LIN Dan, GUO Xiaomei, WANG Weijia

表2 The proportion of positive and negative scavenging processes with different scavenging rates under different precipitation intensities in Sichuan Basin during 2016-2021 单位：%

Tab.2

降水强度/（mm·h-1） 正清除 个例 正清除率 负清除 个例 负清除率 0~<10 10~<30 30~<50 ≥50 >-10~0 >-30~-10 >-50~-30 ≤-50 <1 3 386 33.9 42.5 16.6 6.9 2 882 40.2 39.5 11.2 9.1 1~4 702 16.5 39.6 25.2 18.7 365 31.9 40.2 14.8 13.1 >4 226 12.4 30.2 23.1 34.2 78 39.2 43.1 13.7 3.9