矿物沙尘与盐尘典型区气溶胶光学特性的对比分析  

Comparative Analysis of Aerosol Optical Properties in Typical Regions of Mineral Dust and Salt Dust

作　　者：陈怡璇 王天河[1] 韩颖 乔瀚洋 孙梦仙 黄忠伟[1] CHEN Yixuan;WANG Tianhe;HAN Ying;QIAO Hanyang;SUN Mengxian;HUANG Zhongwei(Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,Gansu,China;Guizhou Meteorological Bureau,Meteorological Information Center,Guiyang 550002,Guizhou,China)

机构地区：[1]半干旱气候变化教育部重点实验室,兰州大学大气科学学院,甘肃兰州730000 [2]贵州省气象局,气象信息中心,贵州贵阳550002

出　　处：《高原气象》2020年第4期859-869,共11页Plateau Meteorology

基　　金：国家自然科学基金项目(41775022,41430425);中央高校基本科研业务费专项资金(lzujbky-2017-67)。

摘　　要：选取塔里木盆地(矿物沙尘源)、伊朗高原(矿物沙尘传输区)和咸海地区(盐尘源)三个典型代表区,结合近10年(2007-2016年)的主动(CALIOP/CALIPSO)和被动(OMI/Arua)卫星遥感气溶胶产品,对比分析了沙尘与盐尘气溶胶光学特性的异同。结果表明:(1)柱气溶胶光学厚度具有相似的逐月变化规律,塔里木盆地和咸海地区最大值出现在4月,而伊朗高原出现在夏季;(2)塔里木盆地和咸海地区的气溶胶最大出现频率均接近近地面,而伊朗高原主要集中在海平面以上2~3 km;(3)伊朗高原传输型沙尘与咸海地区盐尘的不规则程度均小于塔里木盆地源区沙尘,且盐尘的粒径大小明显小于矿物沙尘,CALIOP将其主要识别为污染沙尘;(4)咸海地区盐尘的光学吸收性与塔里木盆地源区沙尘相当,略大于伊朗高原的传输型沙尘。The combined decadal(2007-2016)active(CALIOP/CALIPSO)and passive(OMI/Arua)satellite remote sensing aerosol products are used to compare and analyze the similarities and differences between the mineral dust and salt dust aerosol optical properties in three typical regions:Tarim Basin(mineral dust source),Iranian Plateau(transported dust region)and Aral Sea(salt dust source).The main results are as follows:(1)The monthly variations of column aerosol optical depth have similar patterns in three regions,the maximum of AOD in Tarim Basin and Aral Sea appear in April,while the Iranian Plateau occurs in summer;(2)The maximum occurrence frequency of aerosol in Tarim Basin and Aral Sea are both close to the ground,while Iranian Plateau concentrates on about 2~3 km above sea level.(3)The nonsphericity of transported dust in Iranian Plateau and salt dust in Aral Sea are both weaker than that of source-region dust in Tarim Basin,and the particle size of salt dust is significantly smaller than that of mineral dust,hence salt dust is identified as polluted dust by CALIOP.(4)The absorption capacity of salt dust in Aral Sea is comparable to that of the mineral dust in Tarim Basin,but slightly greater than transported dust in Iranian Plateau.

关 键 词：矿物沙尘 盐尘 发生频率 垂直分布 光学特性 

分 类 号：P407.5[天文地球—大气科学及气象学]