Analysis on Characteristics and Influence Factors of Acid Rain Pollution in Sichuan Province from 2015 to 2022
Based on the statistics of precipitation monitoring data in Sichuan Province from 2015 to 2022,the variation rules and ion component characteristics of acid rain were analyzed,and the possible influencing factors were discussed.The results showed that the precipitation acidity decreased significantly in Sichuan Province,and the acid rain pollution gradually improved,the frequency of acid rain decreased from 16.5%to 2.6%,and the ratio of SO2-4 to NO-3 equivalent concentration decreased from 2.4 in 2015 to 1.6 in 2022.Meanwhile,a comparative analysis of the emissions and sources of atmospheric pollutants in the Sichuan Province from the period of"12th Five-Year"concluded that the emission reduction of NOx and SO2 was the main factor to reduce the pollution of acid rain in Sichuan Province in recent years.Acid rain in Sichuan Province had gradually changed from"sulfuric acid predominated type"during 2011-2015 to"sulfuric and nitric mixed acid type".Acid rain pollution in Sichuan Province showed obvious seasonal characteristics,autumn and winter were the most obvious periods of acid rain pollution,and controlling the emission of air pollutants in these two seasons played an important role in reducing the pollution of acid rain.Acid rain pollution is still closely related to the regional economic development,and the areas with high frequency of acid rain are mainly the south Sichuan economic zone and the panxi economic zone.The contribution of NOx to acid rain is increasing.It has great significance to control the source of pollutants for the prevention and reduction of regional acid rain.
acid rainacid rain characteristicinfluence factorSichuan Province
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万方数据
