祁连山北坡夏季晴天气溶胶粒子变化特征  

Variation Characteristics of Aerosol Particles from Clear Sky in the North Slope of Qilian Mountain

作　　者：周黎明[1] 陈跃[2] 牛生杰[3] 孟蕾 

机构地区：[1]山东省人工影响天气办公室,山东济南250031 [2]中国气象科学研究院,北京100081 [3]南京信息工程大学大气物理与大气环境重点实验室,江苏南京210044 [4]湖南省气象局培训中心,湖南长沙410125

出　　处：《干旱气象》2014年第2期233-238,共6页Journal of Arid Meteorology

基　　金：国家自然科学基金重点项目"西北地形云结构及降水机理研究"(40533015);山东省气象局重点课题(2012sdqxz07)共同资助

摘　　要：利用2007 年7 月祁连山区民乐县何庄进行的晴空观测所获得的PMS 资料,对祁连山区大气气溶胶粒子的数浓度分布及日变化特征进行了统计分析,并结合相对湿度、风速和风向等气象资料,讨论了气溶胶粒子浓度与气象因子的关系.结果表明,该地区PCASP 探测的气溶胶平均数浓度为102 ～103 个·cm - 3,FSSP -100 探测的粒子平均数浓度为10 - 2 ～101 个·cm - 3,日变化特征表现为早晚大,中午小;FSSP 和PCASP 探测的气溶胶粒子谱分别呈负指数型和单峰型分布特点,其Junge 幂指数谱分布和Deirmendjian 广义Γ 谱分布的分段拟合,能够更好地显示当地粒子的演变特征;此外,气溶胶粒子不仅与相对湿度、气温之间存在相关性,而且与风向风速亦有明显关系.Based on the PMS （Particle Measuring System）observational data under clear sky condition in July 2007 in Hejiazhuang village of Gansu Province located in the foot of the Qilian Mountain,the distribution and diurnal variation of aerosol particles number concentration were analyzed,firstly. Then,combined with the relative moisture,wind speed and wind direction from Niangniang hill of theQilian Mountain,the relationship between the concentration of aerosol particles and meteorological factors was discussed. The resultsshowed that the mean concentration of aerosol particles probed by PCASP and FSSP -100 was 102 ～103 个·cm - 3 and 10 - 2 ～101 个·cm - 3 respectively,and the diurnal variation of aerosol was big in the morning and evening,while that was small at noon. The spectral distributions of aerosol particles observed by FSSP and PCASP appeared the feature of power and negative exponent functions,respectively and were well fitted by Junge spectral distribution and Deirmendjian - Γ spectral distribution,which could perfectly reflectthe evolution characteristics of the particle. In addition,the concentration of aerosol particles was not only consistent with the relativehumidity and temperature,but also correlative with wind speed and wind direction.

关 键 词：祁连山地区 气溶胶粒子 日变化 谱分布 

分 类 号：X513[环境科学与工程—环境工程]