景德镇市酸雨的天气形势与气象条件分析

利用景德镇市酸雨、气象要素观测资料和常规天气图等资料,对景德镇酸雨的天气形势与气象条件进行分析,结果表明:1)冬季,酸雨频率大,酸性强,与冷空气将北方较重污染的气体或污染物影响有关;夏季,受南方暖湿气流作用下产生降水,酸度较低。2)景德镇市降水pH值与降水量有一定的正相关,降水量越大,pH值越大;而气压值越小,pH值越大;湿度与酸雨的相关性不如气温与酸雨的关系明显;强酸雨时主要是盛行N风和NNW风,弱酸雨或无酸雨时,多西南风分量;雾天酸性降水不仅频率高,而且酸度强。3)城乡之间存在一定的差异,污染物排放较大的企业地处城区附近,这些污染源造成景德镇市城区酸雨较农村、郊区严重。

Characteristic Analysis of the Meteorological Conditions Causing Acid Rain in Jingdezhen City

By using acid rain data、meteorological elements data from AWS and routine synoptic data and so on,the weather situation and meteorological conditions causing acid rain have been conducted in this article. The results show that. 1） In winter,the acid rain frequency high and acidity strong in Jingdezhen. This pH enomenon is related with cold air which brought heavy pollutants from the north. In summer,the acidity of acid rain that caused by warm wet moisture is decreased. 2） The pH value and precipitation show certain positive correlation in Jingdezhen,the more rainfall and the lower the pressure are,the larger pH value is. The correlation between humidity and acid rain is poorer than the temperature. There are prevalent winds from north or north-northwest when sever acid rain happens,and winds from southwest during weak acid or no acid rain. However,the acidity and frequency of acid rain are more severe in a foggy day. 3） The acid rain is more heavy in rural area than urban area of Jingdezhen. This is contributed by factories discharged more pollutants are most built in rural area.