摘要
采用CALIPSO卫星level2气溶胶廓线产品,分析了2017年塔克拉玛干沙漠腹地塔中地区气溶胶光学厚度、消光系数和气溶胶类型的时空分布特征,并利用HYSPLIT模式研究了秋冬季节污染型气溶胶的输送路径.结果表明:(1)研究区域内2017年气溶胶光学厚度均值在0.08~0.73之间变化,最大值出现在春季.(2)气溶胶消光系数分布在0~0.5 km^(-1)的频率最高,4 km以下的气溶胶消光系数高于4 km以上.春、夏、秋、冬四季气溶胶消光系数廓线的最大值分别为0.350、0.243、0.160、0.356 km^(-1),分别出现在1.23、1.41、2.55、1.12 km高度处.(3)与春夏季相比,秋冬季节出现污染沙尘型气溶胶的频率更高,分别为23.4%、26.9%,污染大陆型气溶胶主要出现在冬季的0~2 km处,烟尘型气溶胶主要出现在秋季的6~8 km处.HYSPLIT模式模拟结果表明,秋冬季节沙漠腹地上空6 km处的污染型气溶胶与阿克苏、喀什等地区有关,2 km处的污染型气溶胶与和田地区有关,其中,喀什地区可能是沙漠腹地上空污染型气溶胶的主要源区.
Using the CALIPSO satellite level 2 aerosol profile product, the temporal and spatial distribution of optical depth, extinction coefficient and types of the aerosols at the Tazhong in the Taklimakan Desert hinterland in 2017 were analyzed. The HYSPLIT backward trajectory model was used to study the transporting path of polluted aerosols in autumn and winter. The results showed that:(1)The average optical depth of aerosols in the study area in 2017 was between 0.08 and 0.73, reaching maximum in spring.(2)The aerosol extinction coefficient was mainly between 0~0.5 km^(-1), and extinction coefficient of the aerosols was greater below 4 km than that above. The seasonal maximums of the aerosol profile were as follows: 0.350 km^(-1)(spring), 0.243 km^(-1)(summer), 0.160 km^(-1)(autumn) and 0.356 km^(-1)(winter), which appeared at the height of 1.23 km, 1.41 km, 2.55 km and 1.12 km, respectively.(3)Compared with spring and summer, the frequency of polluted dust aerosols was higher in autumn and winter, reaching 23.4% and 26.9%, respectively. The Polluted continental aerosols mainly appeared at 0~2 km in winter, and the smoke mainly appeared at 6~8 km in autumn. The results from HYSPLIT model showed that in the autumn and winter the polluted aerosols at 6 km came from the Aksu and Kashgar, and that at 2 km came from Hotan, furthermore, Kashgar might be the main source of polluted aerosols over the desert hinterland.
作者
周海江
刘鑫
刘琼
陈勇航
刘平平
黄观
蒋文泽
何清
易鑫
骆梦洁
ZHOU Haijiang;LIU Xin;LIU Qiong;CHEN Yonghang;LIU Pingping;HUANG Guan;JIANG Wenze;HE Qing;YI Xin;LUO Mengjie(College of Environment Science and Engineering,Donghua University,Shanghai 201620;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092;Desert Meteorology Field Experiment Station of CMA,Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第9期3725-3734,共10页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.41675026,42030612,41905131,41375021)。
关键词
气溶胶光学厚度
气溶胶消光系数
气溶胶类型
垂直分布
塔中
aerosol optical depth
aerosol extinction coefficient
aerosol type
vertical distribution
Tazhong
