内陆地区近地面大气消光系数统计特征及气象要素影响分析

使用能见度仪测量了合肥地区2005年6月到2007年7月期间近地面的大气消光系数.给出了大气消光系数的时间变化特征和频数分布特征以及大气消光系数与相应时间段的水汽、温度、气压、风速的相关性.结果表明：局地大气消光系数具有明显的日变化、月变化、季节变化和频数特征|不同季节的消光系数与气象要素的相关性有所不同|其中水汽、温度是两个较为重要的影响消光系数特征分布的因素.分析结果可以作为局地大气消光系数模型建立的基础.

Statistical Characteristic on Atmospheric Extinction Coefficient and ImpactAnalysis on Meteorological Elements of Surface Layer of Inland Area

 Visibility meter is used to measure atmospheric extinction coefficient of surface layer in Hefei area from June 2006 to July 2007.The characteristics of time variation and frequency distribution on atmospheric extinction coefficient are discussed. Also,the correlations between atmospheric extinction coefficient and water vapor,temperature,atmospheric pressure, wind speed in the corresponding period are analyzed.The results show that there are daialy change, monthly change, seasonal change and frequency distribution of the characteristics on local atmospheric extinction coefficient. The correlations between the atmospheric extinction coefficient in different seasons and the meteorological elements are different.Relative humidity and temperature are two important factors to affect the change of atmospheric extinction coefficient. The results can provide the base for building extinction coefficient of local model.