2021年中国北部特大沙尘天气的遥感监测与路径分析  

Remote sensing monitoring and transport path analysis of an intense dust weather in northern China in 2021

作　　者：叶洽 郑小慎 赵尚玉 YE Qia;ZHENG Xiaoshen;ZHAO Shangyu(Tianjin University of Science and Technology,College of Marine and Environmental Sciences,Tianjin 300457,China)

机构地区：[1]天津科技大学海洋与环境学院,天津300457

出　　处：《遥感学报》2023年第8期1821-1833,共13页NATIONAL REMOTE SENSING BULLETIN

基　　金：天津市自然科学基金(编号:19CYBJC23600)。

摘　　要：2021年3月中旬,中国北部地区遭遇了近十年来最强的一次沙尘天气。本文利用多源卫星和PM_(10)浓度数据对此次沙尘天气过程进行了水平、垂直方向动态监测,并通过HYSPLIT模式前向、后向轨迹的聚类分析了沙尘的来源及传输路径,结果表明:(1)2021年3月14日至18日,中国20个省市和渤黄海近岸海域均受到沙尘影响,其中西北、华北、东北地区部分省市出现沙尘暴,华中、华东部分省市和渤黄海近岸海域受轻度沙尘天气影响。(2)14日至15日的沙尘主要源自蒙古国中部,16日至18日的沙尘则更多来自中国内蒙古中西部和新疆维吾尔自治区中部。沙尘传输路径可以分为西北路、北路、西路3支。(3)沙尘的输送高度主要为对流层低层1—3 km与对流层中高层3—10 km,高于“三北防护林”等生态环境工程的风沙拦截高度。多源卫星产品和数值模式相结合,为中国沙尘天气的预报预警以及沙尘污染的区域联防联控提供了科学参考。Northern China was hit by a strong dust storm with unprecedented intensity and influence around the middle of March 2021.In this study,the horizontal and vertical dynamic development and the transport path of this dust event were investigated using multi-source satellite observations,PM_(10) concentration data,and the HYSPLIT model.FY-4A/AGRI DST can efficiently identify dust in cloudless weather,FY-4A/AGRI IDDI-BK can semi-quantitatively characterize dust intensity,and SP-5/TROMI UVAI has the advantage of detecting dust under clouds.Therefore,in this paper,both DST and IDDI-BK were used to identify the affected area and the intensity characteristics of the dust event.UVAI data were also used to supplement the under-cloud dust information that may have been missed by DST.After obtaining the horizontal distribution characteristics,this paper continues analyzed the vertical distribution height of dust using CALIPSO VFM data.The transport path of dust was also described by using the forward-and back-trajectory analyses of the HYSPLIT model and trajectory clustering.The severe dust storm first appeared in central Mongolia on March 14.Widespread dust storms appeared over central and western Inner Mongolia,central Gansu,Ningxia,northern Shaanxi,northern Shaanxi,Hebei,Jilin,northwestern Liaoning,and northwestern Heilongjiang on March 15.From March 16 to 18,the coverage of the extreme dust storm in northern China narrowed westward,while a strong dust storm continued to strike western Inner Mongolia and central Gansu.A huge dust storm then attacked central Xinjiang,and a light dust storm affected parts of central and east China as well as the coastal waters of the Bohai and Yellow Seas.On March 18,the dust storm disappeared.Results show that central Mongolia is the main source of the dust storms over northern China between March 14 and 15 and that both central Xinjiang and central and western Inner Mongolia are the major contributors to the widespread dust storms that were reported from March 16 to 18.The dust transport r

关 键 词：沙尘天气过程 FY-4A 遥感监测 沙源地 传输路径 

分 类 号：X513[环境科学与工程—环境工程] P2[天文地球—测绘科学与技术]