江苏省南通市区3个测点降水组分对比分析

本文系统分析了2008年度南通市区3个降水监测站位数据,用年、月均值(雨量酸雨频率为累积值)分析了测站之间的差异量,用月均值分析了测站之间的相关性,用每次降水中的PH值分析了4级PH值出现的频率。得出虹桥子站与南郊公园和交巡警支队相比,降水量分别高出337.36mm和289.78mm,酸雨频率分别高出八点八个百分点和减少零点零七个百分点,pH分别低于0.18和0.01,电导率分别低于0.43 ms/m和0.53ms/m,九项阴阳离子年均值均偏低;在50%酸性降水中,pH值分布在≤4.5的频率最高;监测站之间指标具有低度线性相关、显著性相关和高度线性相关3级。说明:降水测站之间指标数据相关性高低,与接受的大气污染物种类和数量、大气扩散条件有关。因此各降水测站酸雨程度高低,与区域大气污染源强度、大气扩散条件密切关联。

Contrastive Analysis on Precipitation Component at 3 Monitoring Points in Nantong City, Jiangsu Province

This paper analyzed precipitation data of 3 monitoring stations in Nantong, 2008, using yearly value and monthly value to analyze the difference quantity among monitoring stations（data of rainfall and acid rain frequency were accumulate value）, using monthly value to analyze the relativity, using pH value in each precipitation to analyze the ~currence frequency of 4- grade pI-I. The results show that compared with Nanjiao Park and Traffic Police Crew Monitoring Stations, the rainfall of Hongqiao station is higher that 337.36mm and 289.78mm, acid frequency is higher that 8.8 % and less than 0.07 %, pH is less than 0.18 and 0.01, conductivity is less than 0.43ms/ m and 0.53ms/m, and 9 anion cation indexes are less than that of other stations. In 50% of acidic precipitation, the frequency of pH values ≤4.5 is the highest, the indexes of different stations show low linear correlation, remarkable linear correlation and high degree linear correlation. The correlation of indexes of different stations is related to the type and quantity of atmospheric pollution and atmospheric diffusion conditions, as well as the degree of acid rain.