干旱区地理2025，Vol.48Issue(5)：789-800,12.DOI:10.12118/j.issn.1000-6060.2024.359
中国北方地区两次沙尘暴对典型大城市的影响
Impact of two sandstorms on typical cities in northern China:A case of Lanzhou City and Beijing City
摘要
Abstract
The complex relationship between dust storms and meteorological factors is the primary driver of par-ticulate matter formation and distribution.These dust storms also significantly affect transportation,agriculture and animal husbandry,and population health.Using the HYSPLIT,wavelet coherence,and random forest mod-els,the transport paths of two strong dust storms in northern China,one from March 10 to 25,2021(SD1)and the other from March 16 to 28,2023(SD2),were investigated.In addition,the effects of meteorological factors on ur-ban PM10 were investigated.The findings revealed the following.(1)A high aerosol optical thickness(AOD)belt stretching across Xinjiang,Gansu,Shaanxi,and Shandong formed in northern China during these two dust storm events.This phenomenon was primarily attributed to the southward movement of the Mongolian cyclone and the strong westerly wind circulation in Xinjiang.(2)The overall airflow transmission moved from northwest to north-east.Lanzhou was found to be susceptible to Xinjiang cyclones,while Beijing was notably affected by Mongo-lian cyclones.During SD1,airflow in Lanzhou primarily originated from Qinghai and Xinjiang,with 53.64%of Beijing's air mass being transmitted to northeast regions of China and extending into northeastern Russia.During SD2,51.16%of Lanzhou's airflow stemmed from Inner Mongolia,while 49.41%of Beijing's airflow moved to-ward areas such as Shandong and Jiangsu.(3)PM10 variations in SD1 exhibited greater sensitivity to meteorologi-cal factors over longer time scales.In contrast,SD2 displayed diverse responses to meteorological factors over shorter time scales.(4)Lanzhou served as the collision zone for the two cyclones,showing unstable pressure and temperature changes.Conversely,Beijing acted as the endpoint for dust storm input,primarily influenced by tem-perature.These results facilitate a better understanding of dust storm formation mechanisms in northern China and of the interactions between meteorological factors and particulate matter.关键词
沙尘暴/谷歌地球(GEE)/路径分析/小波相干性/气象归一化Key words
dust storms/Google Earth Engine(GEE)/trajectory analysis/wavelet coherence/meteorological normalization引用本文复制引用
李佳宸,巨天珍,李丙南,邱玉梦,曹亚群,王佳琦..中国北方地区两次沙尘暴对典型大城市的影响[J].干旱区地理,2025,48(5):789-800,12.基金项目
甘肃省自然科学基金(17YF1FA120)资助 （17YF1FA120）
