###
气象:2016,42(7):857-864
本文二维码信息
码上扫一扫!
2007—2014年湖北省酸雨变化时空特征分析
(武汉区域气候中心,武汉 430074)
Analysis of Variation of Acid Rain in Hubei During 2007-2014
(Wuhan Regional Climate Centre, Wuhan 430074)
摘要
图/表
参考文献
相似文献
本文已被:浏览 942次   下载 1755
投稿时间:2015-07-16    修订日期:2016-05-20
中文摘要: 本文利用湖北省32个监测站2007—2014年及宜昌、武汉站1990—2014年酸雨逐日监测资料,对湖北省酸雨变化情况进行分析,结果表明:湖北省年均降水pH值为4.68,属于弱酸雨等级;自2008年开始全省酸雨强度不断减弱,2007—2014年期间持续为弱酸雨等级,pH低值区主要位于三峡河谷地区及鄂西部分地区、鄂东南西部及南部;年均酸雨、强酸雨频率分别为69.5%、24.4%,酸雨频率呈波动下降趋势,强酸雨频率自2009年开始呈现明显减少趋势,酸雨频发区主要位于南部大部地区及鄂西北东部;年均电导率为50.3 μs·cm-1,主要呈现中部高、东西低的分布型;湖北省酸雨强度冬强夏弱,发生频率冬多夏少,电导率冬高夏低;武汉2005年以后酸雨强度趋于增加,2006—2012年持续为强酸雨,电导率呈增加趋势,宜昌酸雨强度、降水污染程度均高于武汉;另监测显示,湖北上空NO2含量分布范围呈现扩散加重趋势,武汉地区SO2呈减少趋势,NO2呈增加趋势,这种变化有可能导致湖北省酸雨类型逐渐从硫酸主导型向复合型转变。
Abstract:By using the daily observation data of acid rain from 32 stations from 2007 to 2014 as well as Yichang and Wuhan Stations during 1990-2014, we studied the variation of acid rain in Hubei Province. The results indicated that the precipitation of the region shows weak acidity and the mean pH is 4.68. The intensity has been in the trend of getting weak since 2008, maintaining a weak level between 2007 and 2014. The areas with pH less than 4.5 are located in the Three Gorges Valley, some areas of western part, the west of southeastern part, and the southern part of Hubei. The average annual frequency of acid rain and strong acid rain is 69.5% and 24.4% respectively. The frequency tends to decline while the strong acid rain shows the trend of decreasing significantly since 2009. The areas where acid rain occurs frequently are located in most southern part and the east of northwestern part of Hubei. The average annual electrical conductivity is 50.3 μs·cm-1, showing a pattern of high in central part and low in west and east part. The pH value is lower in winter than in summer while the frequency and electrical conductivity are higher in winter than in summer. The intensity of acid rain in Wuhan has been inclining to increase since 2005, retaining a strong during 2006-2012 while the electrical conductivity has a increasing trend. Both the intensity and pollution level are higher in Yichang than in Wuhan. In addition, the content of nitrogen oxides over Hubei Province tended to spread and increase. The sulphur dioxide content in Wuhan tends to decline while the nitrogen dioxide content tends to increase. Because of this change the acid rain components in Hubei may transform from sulfate to sulfate combined with nitric acid.
文章编号:     中图分类号:    文献标志码:
基金项目:湖北省气象局科技发展基金(2015Y05)资助
引用文本:
王苗,刘敏,王凯,柳晶辉,2016.2007—2014年湖北省酸雨变化时空特征分析[J].气象,42(7):857-864.
WANG Miao,LIU Min,WANG Kai,LIU Jinghui,2016.Analysis of Variation of Acid Rain in Hubei During 2007-2014[J].Meteor Mon,42(7):857-864.