内蒙古沙地和草地环境下近地面PM10分布特征及其与相关气象要素的关系  

Characteristics of PM10 Mass Concentration and the Influence from Meteorological Factors in Different Underlying Surface Conditions in Inner Mongolia

作　　者：邱玉珺[1] 牛生杰[1] 沈建国[2] 

机构地区：[1]南京信息工程大学中国气象局大气物理与大气环境重点开放实验室,南京210044 [2]内蒙古自治区气象局,呼和浩特010051

出　　处：《气候与环境研究》2009年第1期97-104,共8页Climatic and Environmental Research

基　　金：国家重点基础研究发展规划项目2006CB403706;国家自然科学基金资助项目40705005、40765001

摘　　要：利用内蒙古锡林浩特和朱日和2005年的PM10质量浓度(MPM)和相关气象要素资料,分析了沙地和草地环境下MPM的分布特征,发现MPM受沙尘天气的影响较大,非沙尘日MPM在不同下垫面条件下差别不大。进一步分析发现,气象要素对MPM有较大的影响,在选取相关气象要素参量的基础上,将各参量相乘建立了气象影响指数IPM,表示气象条件对MPM的综合作用,经检验发现锡林浩特和朱日和IPM值与MPM日均值的相关系数都大于0.70,高于MPM与其他单气象要素,月均值的线性相关性更显著。对同一气候带不同下垫面条件下不同季节IPM值与MPM的对比分析发现,气象条件对近地面MPM的影响比下垫面条件更显著。There is increasing attention focused on the influence of aerosol to the climate change and the environment. What extent and relationship on the meteorological factors to the aerosol mass concentrations （MPM） is a challenging subject. Studying the relationships is beneficial to improve the aerosol model and better understand the climate change. By analyzing the MPM and corresponding meteorological data of Xilinhot and Jurh in 2005, which locate in semi-arid area in Inner Mongolia, representing sandy land and grassland, the results show great influence on MPM from dust events. There are little difference in non-dust events. Further analysis implies there are interaction between the MPM and the meteorological conditions, that is the wind speed and air temperature increase with larger MPM, relative humidity, air pressure and visibility decrease with larger MPM, respectively. On the base of correlation analysis between the MPM and the meteorological factors, which the wind, air temperature and air pressure are significantly positive correlation and relative humidity is significantly negative correlation with MPM, and the climate condition index IPM expression taking account of the above meteorological factors is given as a comprehensive effect on MPM. The results show that the correlation coefficient of the two stations between the IPM value and MPM are larger than 0.70, more significant than only considering single meteorological factor. And it also indicates that there is obvious linear relation between monthly IpM and MPM. By analyzing different seasonal correlation relationship of IPM values and MPM, it shows the latter is the main factor influence on MPM between the different underlying surface conditions and meteorological condition.

关 键 词：沙尘气溶胶 质量浓度 气象要素 PM10 

分 类 号：P422[天文地球—大气科学及气象学]