摘要
根据南京气象观测站2004年1月—2008年7月逐日观测资料,南京市环境质量监测点2004年1月—2007年12月SO2、NO2、PM10的逐日实测资料,对南京市霾天气的气象要素特征及其成因进行了初步分析。结果表明：（1）南京霾现象多发生在中午前后,11时出现的次数最多;春秋冬季霾天气出现时次多,夏季少。（2）南京霾天气时能见度多在4~8 km范围内;静小风,风速主要在1~3 m/s,偏东风时霾天气发生较多;相对湿度在40%~70%间有利于霾天气出现,尤以50%~60%时出现概率最高。（3）大气颗粒物（特别是细颗粒物）污染加剧,很可能是南京霾天气频发的一个重要原因。
Based on daily observations obtained from Nanjing Meteorological Station from January of 2004 to July of 2008 and daily measured data including SO2,NO2 and PM10 obtained from Nanjing Environmental Quality Monitoring Station from 2004 to 2007,characteristics of meteorological elements and causes of hazy phenomena in Nanjing are preliminarily analyzed.The result showed that：（1） Hazy phenomenon often happens around midday,especially at 11：00.There is high frequency of occurrence of hazy phenomena in winter,spring and autumn,but rare in summer.（2） In hazy days,visibility is often 4-8 km,the wind speed is small（about 1-3m/s） and it belongs mainly to easterly weather.The hazy phenomena often occur under the condition of relative humidity between 40% and 70%,particularly between 50% and 60%.（3） More and more serious pollution caused by atmospheric particles（especially the fine-mode particles） is likely one of the major reasons for high hazy frequency in Nanjing.
出处
《气象科学》
CSCD
北大核心
2010年第6期868-873,共6页
Journal of the Meteorological Sciences
基金
公益性行业(气象)科研专项(GYHY(QX)200706026)l
江苏省气象局开放基金指导项目(200725)
关键词
霾
气象要素
影响因子
Haze Meteorological factors Effecting factors
