文献类型：期刊文献

英文题名：Analysis of the Severe Dust Process and Its Impact on Air Quality in Northern China

作者：Liu, Xiaoyu[1,2];Zhang, Yu[1,2,3];Yao, Hailan[1,2];Lian, Qinlai[1,2];Xu, Jianjun[3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Key Lab Climate Resources & Environm Continental S, Dept Educ Guangdong Prov,Lab Coastal Ocean Variat, Zhanjiang 524088, Peoples R China;[2]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing 100032, Peoples R China;[3]Guangdong Ocean Univ, CMA GDOU China Meteorol Adm Guangdong Ocean Univ J, South China Sea Inst Marine Meteorol, Zhanjiang 524088, Peoples R China

年份：2023

卷号：14

期号：7

外文期刊名：ATMOSPHERE

收录：SCI-EXPANDED(收录号：WOS:001037944700001)、、EI(收录号：20233114478822)、Scopus(收录号：2-s2.0-85166283730)、WOS

基金：This research was funded by the Major Research Plan of the National Natural Science Foundation of China (grant number 72293604), the Program for Scientific Research Start-Up Funds of Guangdong Ocean University (101302/R17061), the Guangdong Provincial College Innovation Team Project (2019KCXTF021) and the First-Class Discipline Plan of Guangdong Province (080503032101 and 231420003).

语种：英文

外文关键词：sandstorm; air quality; three-dimensional transport; PM10

外文摘要：Extreme meteorological events can influence air quality. In March 2021, northern China experienced a severe dust event, leading to widespread air quality deterioration. Using reanalysis datasets and station data, we investigate the synoptic weather patterns, dust transport characteristics, and associated impacts on air quality during this event. The results are as follows. (1) The dust event is closely linked to the Mongolian cyclone, providing favorable conditions for dust emission and long-distance transport. (2) The Gobi Desert in Mongolia is the primary source, with dust particles transported from Mongolia to northern China via the northwesterly flow. Dust transport exhibits a complex three-dimensional structure, with the most intense dust transport at approximately 2500 m altitude. (3) The impact of this dust event on air quality was characterized by its remarkable intensity, extensive spatial coverage, and prolonged duration. Additionally, 58.8% of the stations in northern China experienced pollution, 36.3% of them reached severe pollution levels or higher, and 35.9% of the sites experienced more than 12 h of pollution. (4) The visibility at the northern stations near the dust source rapidly decreases due to solid dust particles. In contrast, the southern stations, with higher moisture content, are primarily affected by liquid particles in terms of visibility. After the frontal passage, wet deposition from the precipitation process gradually improves visibility.