降水量变化对大气污染物浓度影响分析

系统分析了2001～2010年南通市城区中大气自动监测站和降水监测点位数据,得出:10年间逐年降水量与二氧化硫年均浓度呈现高度线性负相关,其它时空降水量与大气污染物浓度分布中呈现非线性显著性负相关。降水量大污染物浓度就小,反之就大。2006～2010年5年平均降水量1083.49mm,比2001～2005年5年平均降水量多出244.97mm,大气污染指标5年平均浓度下降幅度为:可吸入颗粒物0.013mg/m3、二氧化硫0.009mg/m3、二氧化氮无变化。10年的平均季度降水量夏季最大为467.97mm,对应的夏季大气污染物最小均值为:可吸入颗粒物0.073mg/m3、二氧化硫0.026mg/m3;10年平均季度降水量冬季最小为137.84mm,对应的冬季大气污染物季最大均值为:可吸入颗粒物为0.104mg/m3、二氧化硫0.034mg/m3和二氧化氮0.036mg/m3。

Analysis on Impact of Precipitation Variation on Atmospheric Pollutants Concentration

This paper analyzes the air automatic monitoring station and precipitation monitoring data from 2001 to 2010 in Nantong City,conclusion shows：precipitation and sulfur dioxide annual average concentrations are highly negative linear correlation in 10 years,other temporal precipitation and atmospheric pollutants concentration distribution shows nonlinear significant negative correlation.Pollutant concentrationis low under precipitation,whereas it is high.Average annual rainfall is 1083.49 mm of 2006～2010,which is 244.97 mm more than that of 2001～2005.Decline rates of average concentrations of air pollution indexes in 5 years are as follow：respirable particulate matter is 0.013 mg /m3,sulfur dioxide is 0.009 mg /m3,nitrogen dioxide has no change.In 10 years,maximum average quarter precipitation in summer is 467.97 mm,the corresponding atmospheric pollutants minimum values are：respirable particulate matter 0.073 mg /m3,SO2 0.026 mg /m3;minimum average quarter precipitation in winter is 137.84 mm,the corresponding atmospheric pollutants maximum values are：respirable particulate matter 0.104 mg /m3,SO20.034 mg /M3 m3 and NO2 0.036 mg /m3.