摘要
利用2014年5月地面气溶胶集成观测系统在敦煌戈壁地区的观测资料,分析气溶胶的光学特性,并用后向轨迹模式分析气溶胶的主要来源.气溶胶的散射、吸收系数和单次散射反照率分别为52.71±43.02、2.11士1.02Mm^(-1)、0.949±0.022.气溶胶粒径谱主要分布在5μm以下,在0.6、1.5μm处分别有峰值出现.气溶胶中的沙尘气溶胶含量较大,散射系数和吸收系数在早晚有峰值出现.气溶胶受西北方向风影响较大,通过后向轨迹聚类分析知道北边大片戈壁方向来的气团占主导地位,其次是来自库木塔格沙漠方向的,还有少部分来自青海的柴达木盆地和新疆古尔班通古特沙漠.
Using the observational data obtained by ground aerosol integrated observation system from Dunhuang gobi region in May, 2014, the aerosol optical properties of there were analyzed, and a back trajectory clustering analysis was used to analyze the main sources of the aerosols. Aerosol scattering and absorption coefficients and single scattering albedo were 52.71±43.02, 2.11±1.02 Mm^-1 and 0.949±0.022, respectively. Aerosol size distribution was mainly less than 5 μm, and had a peak at 0.6 μm and 1.5 μm, respectively. The aerosols contained more dust aerosol, and both the scattering and absorption coefficients had a peak in the morning and evening, respectively. Northwester winds had more impact on aerosols. Based on the back trajectory clustering analysis, it was discovered that the mass steams were mainly from the northern gobi region, the mass streams were from Kumtag Desert and a small portion was from Qaidam Basin of Qinghai and Gurbantonggut desert.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第3期342-349,共8页
Journal of Lanzhou University(Natural Sciences)
基金
国家重大科学研究计划项目(2012CB955302)
国家自然科学基金项目(41405113)
中央高校基本科研业务费专项资金资助(lzujbky-2015-3)
关键词
气溶胶
光学特性
散射系数
吸收系数
粒径谱分布
aerosol
optical property
scattering coefficient
absorption coefficient
size distribution
