南宁市大气能见度变化特征及影响因子分析.pdfVIP

第28卷 第4期 气 象 研 究 与 应 用 Vo1．28 No．4 2007年12月 JOURNAL OF METE0R0L0GICAL RESEARCH AND APPLICATION Dee．2007 文章编号：1673—8411(2007)04—0026—03 南宁市大气能见度变化特征及影响因子分析 廖国莲 ，程 鹏 (1．广西气候中心，广西 南宁 530022；2．广西人工影响天气办公室，广西 南宁 530022) 摘 要：对2000至2006年的南宁市能见度资料进行统计分析。分析表明，南宁市近7a能见度年均值在13～17km 之间，总体呈下降趋势。一年之中，能见度最小值主要出现在1至3月，最大值出现在6至7月，汛期能见度明显 好于非汛期。一日之中，能见度的日变化为：O8时02时20时14时。能见度与气象因子的相关分析表明，能 见度与温度、风速成正比，与压强、降水、湿度成反比。与污染物的相关分析表明，能见度与PM，。浓度的相关性较 强，达到一0．58。 关键词：能见度；影响因子；气象因子；污染物 中图分类号：P46 文献标识码：A Analysis on variation features of atmospheric visibility and its influencing factors in Nanning LIAO Guo-lian ，CHENG Peng。 (1．Guangxi Climatic Center，Guangxi Nanning 530022； 2．Guangxi weather modification office，Guangxi Nanning 530022) Abstract：In this paper，the visibility data of Nanning from 2000 to 2006 are statistical analyzed． The results showed that。the annual average of visibility which is between 1 3 and 1 7 in Nanning nearly 7 years has declined．The minimum visibility occurs primarily in Jan．to Mar，and the maximum visibility occurs primarily in Jun．to Ju1．in a year．The visibility in flood season is obviously better than that in non—flood season．The daily variation of visibility is 08’02’20’ 14’．Correlation analysis between visibility and meteorological factors indicate that the visibility has positive correlation with temperature and wind velocity，while it has negative correlation with pressure，precipitation and relative humidity．Correlation analysis between visibility and pollutants indicate that the visibility has significantly negative correlation with PM1o concentration，and the relativity is一0．58． Key words：visibility；influencing factors；meteorological factors，pollutants