摘要
通过对1992-2006年郑州酸雨观测站数据以及2001年4月-2006年12月郑州空气质量逐日数据进行统计分析,发现郑州市降水酸性呈现增强趋势,主要发生在秋、冬两个季节,频率在40%以上,冬季酸雨发生天数要多于秋季,降水酸度在秋末至12月较强。影响酸雨的主要因子为PM10、SO2与NO2浓度和降水量,PM10主要通过与酸性气体的化学反应来影响降水电导率K值,降水对大气中PM10的净化有较强的作用。连续性降水过程中降水pH值有减小趋势的占57.14%,主要在于降水对地面的湿润作用有效地阻止了来自地面的可溶性微粒进入大气中,不能足够吸收大气中酸性物质,致使酸性物质直接进入降水中造成降水持续酸化。
The variation characteristic and influencing factor of acid rain were studied in this article based on the observational data of acid rain in Zhengzhou from 1992 to 2006 and the daily air quality data from April 2001 to December 2006.The result showed that the acid rain occurs mainly in autumn and winter,and the frequency of occurrence is above 40%,and the days of acid rain in winter is more than that of in autumn.The acidity of the precipitation has the enhancement trend in Zhengzhou,and the acidity of the rainfall is more acidic from the end of the autumn to December.The main factors of influencing the acid rain are the concentration of PM10,SO2,NO2,and the amount of precipitation.The ions of PM10 affect the electrical conductivity of the rainfall by the chemical reaction with the acid gas,and the rainfall have a stronger purifying effect on the ions of PM10 floating in space.In the continuity process of rain,there are 57.14% cases having acidification trend.The humidification of the rain prevents effectively the soluble particles from entering into the atmosphere,which causing that the rain can＇t Absorb sufficiently the acidic materials in the air and leading to the acidic materials going into the rain and making continue acidification of the rainfall.
出处
《气象与环境科学》
2010年第2期32-36,共5页
Meteorological and Environmental Sciences
基金
河南省酸雨业务平台建设及业务服务项目资助
关键词
酸雨
酸化过程
酸性物质
acid rain
acidification
acidic material
