摘要
利用2009—2010年L波段雷达的高空探测资料,对南阳站边界层出现逆温的频率、强度、厚度和起始高度进行了统计分析。结果表明:南阳边界层逆温出现频率年均217天;辐射逆温居多;有明显的季节变化,冬季逆温层出现最多,春、秋季次之,夏季最少。另外,南阳上空出现的逆温中接地逆温比较多,19时比07时出现次数多。通过对2009年南阳各月PM10浓度与逆温层月际分布的对比分析发现,接地逆温出现频次多少与PM10的浓度大小存在必然的联系,说明逆温是影响南阳空气质量的重要气象因子。
By using the high altitude detecting data of L-band radar in 2009—2010,we have made a statistical analysis of frequency,strength,thickness and starting high level of temperature inversion of Nanyang boundary layer.The research result is that the frequency of grounded temperature inversion reaches the average of 217 days per year;more radiation inversion days appear;and inversion days are effected obviously by season change,which is more in winter,then in spring and autumn,least in summer.In addition,a higher frequency of surface inversion appears more in this area,the frequency at 19 pm is higher than 07 am.According to the comparative analysis of PM10 concentration of the each month in 2009,there is a necessary connection between the PM10 concentration and the surface inversion frequency,which proves that the emergence of temperature inversion of Nanyang made a direct impact of the air quality.
出处
《气象与环境科学》
2011年第B09期116-119,共4页
Meteorological and Environmental Sciences
关键词
边界层
逆温
强度
厚度
季节分布
boundary layer
temperature inversion
strength
thickness
seasonal distribution
