干旱气象

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东亚三次典型沙尘过程移动路径和特征

白冰1,2,3张强2,4陈旭辉1韩海涛1,5   

  1. (1.甘肃省气象信息与技术装备保障中心,甘肃兰州730020;2.兰州大学,大气科学学院,甘肃兰州730020;
    3.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与
    减灾重点实验室,甘肃兰州730020;4.甘肃省气象局,甘肃兰州730020;5.兰州中心气象台,甘肃兰州730020)
  • 出版日期:2018-03-05 发布日期:2018-03-05
  • 作者简介:白冰(1983—),男,辽宁阜新人,工程师,在读博士,主要从事气溶胶及其分类研究. E-mail:baibing_119@163.com。
  • 基金资助:

    甘肃省青年科技基金(1208RJYA010)和国家自然科学青年基金(41601050)共同资助

Moving Paths and Spatial Characteristics of Three Typical Dust Processes in East Asia

BAI Bing 1,2,3, ZHANG Qiang 1,4, CHEN Xuhui3, HAN Haitao 1,5   

  1. (1. Gansu Meteorological Information and Technic Support and Equipment Center, Lanzhou 730020, China;
    2. College of Atmospheric Science, Lanzhou University, Lanzhou 730020, China;
    3. Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Key Open Laboratory
    of Arid Climatic Change and Reducing Disaster of CMA, Institute of Arid Meteorology, CMA, Lanzhou 730020, China;
    4. Gansu Provincial Meteorological Bureau, Lanzhou 730020, China;
    5. Lanzhou Central Meteorological Observatory, Lanzhou 730020, China)
  • Online:2018-03-05 Published:2018-03-05

摘要:

东亚地区沙尘移动路径主要有三条,即西北路径、偏西路径和偏北路径,利用CALIPSO卫星的Level 1和Level 2两级数据产品,对不同移动路径沙尘天气的沙尘在远距离传输过程中的空间特征进行对比研究。结果表明:西北和偏西路径沙尘天气过程中,沙尘气溶胶垂直分布高度较偏北路径沙尘天气高;偏西路径较西北路径的沙尘天气而言,污染性沙尘粒子有所增多;不同的沙尘源区和移动路径导致大气中气溶胶粒子类型占比不同;西北和偏西路径的沙尘退偏振比均值相近,表明这两次沙尘天气沙尘成分可能相同。

关键词: 沙尘, 移动路径, CALIPSO卫星, 垂直结构

Abstract:

There were three dust moving paths in East Asia, including the northwest, the west and the north. The spatial characteristics of dust for different moving paths were compared during long distance transmission by using the remote sensing data of CALIPSO, and the HYSPLIT trajectory model. The results show that the vertical distribution height of dust aerosol during sand-dust processes for northwest and west path was higher than that of north path dust weather. The pollution dust during west path dust weather process was more than that of the northwest. The different dust source areas and moving paths led to different proportion of aerosol particles component in the atmosphere. The mean depolarization ratios of dust during northwest and west paths dust weather processes were similar to that of the west path dust weather, which showed that the component of aerosol particles might be the same during the two dust weather processes.

Key words: dust, moving path, CALIPSO, vertical structure

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