1991～2004年不同环流背景下南宁市降水化学成分变化特征的研究

基金项目: 广西青年基金项目(桂科青0728035);广西科学研究与技术开发项目(桂科攻0322022-5)共同资助

STUDY ON CHEMICAL CONSTITUTION CHARACTERISTICS OF RAINWATER UNDER DIFFERENT ATMOSPHERIC CIRCULATION OVER NANNING CITY DURING 1991～2004

摘要: 利用1991～2004年广西南宁市降水化学成分资料,结合NCEP/NCAR再分析资料,分析了不同大气环流背景下南宁市降水化学成分的变化特征。结果表明,南宁市的酸雨属硫酸型,酸雨的形成与大气环流密切相关,影响南宁市酸雨的大气环流主要是高空槽锋面,其次是高压后部和热带气旋,受高空槽锋面特别是东路冷空气影响时,出现酸雨的频率最高,pH值最小,雨水中SO₄^2-明显增多,热带气旋降水时,雨水酸度最轻,离子浓度甚至比高空槽锋面影响低2～3倍。
- 大气环流 /
- 降水化学 /
- 雨水酸度分布
Abstract: Based on the precipitation ionic constitution and NCEP/NCAR reanalysis data from 1991 to 2004,the chemical constitution characteristics of rainwater over Nanning in Guangxi was analyzed.The results indicate that the rainwater is of the type of sulfate.The formation of rainwater is related with atmospheric circulation — high-level troughs,the rear part of high pressures and tropical cyclones.When it is influenced by the rain-bearing system of an east-route cold air,the value of pH is the lowest and the ion concentration of sulfate radical increase to a very high level.When it is influenced by tropical cyclone systems,the acidity of rainwater is the least and the ion concentration is also 2～3 times lower than that of high-level trough.
- atmospheric circulation /
- rainwater chemistry /
- rainwater acidity distribution

[1]	秦鹏,杜尧东,刘锦銮,等.广东省酸雨分布特征及其影响因素[J].热带气象学报,2006,22(3):297-300.
[2]	董蕙青,黄海洪,高安宁,等.影响广西酸雨的大气环流特征分析[J].气象,2005,31(10):51-55.
[3]	林长城,林祥明,邹燕,等.福州气象条件与酸雨的关系研究[J].热带气象学报,2005,21(3):330-336.
[4]	林长城,肖辉,赵卫红,等.福建高山、重点城市春季TSP对降水酸度的影响[J].热带气象学报,2006,22(4):405-410.
[5]	雷恒池,吴玉霞,肖辉,等.不同天气系统下我国云雨水化学特征的研究[J].高原气象,2001,20(2):127-131.
[6]	王文兴,丁国安.中国降水酸度和离子浓度的时空分布[J].环境科学研究,1997,10(2):1-7
[7]	蒙远文,蒋伯仁,韦相轩,等.广西天气及其预报[M].北京:气象出版社,1989:3.
[8]	陈志远.中国酸雨研究[M].北京:中国环境科学出版社,1997:4.
[9]	齐立文.两广大陆地区酸雨的时空分布规律和化学特点[J].气象,1995,19(11):8-12.