MAX-DOAS observations of pollutant distribution and transboundary transport in typical regions of China  

作　　者：Hongmei Ren Ang Li Zhaokun Hu Hairong Zhang Jiangman Xu Xinyan Yang Jinji Ma Shuai Wang 

机构地区：[1]School of Physics and Electronic Information,Anhui Normal University,Wuhu 241000,China [2]Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [3]University of Science and Technology of China,Hefei 230026,China [4]School of Geography and Tourism,Anhui Normal University,Wuhu 241000,China [5]China National Environmental Monitoring Centre,Beijing 100012,China

出　　处：《Journal of Environmental Sciences》2025年第5期652-666,共15页环境科学学报(英文版)

基　　金：supported by the National Key Research and Development Project of China(Nos.2022YFC3703502 and 2018YFC0213201);the National Natural Science Foundation of China(No.42105133);the Local Service Project of Hefei(No.2020BFFFD01804).

摘　　要：Studying the spatiotemporal distribution and transboundary transport of aerosols,NO_(2),SO_(2),and HCHO in typical regions is crucial for understanding regional pollution causes.In a 2-year study using multi-axis differential optical absorption spectroscopy in Qingdao,Shanghai,Xi’an,and Kunming,we investigated pollutant distribution and transport across Eastern China-Ocean,Tibetan Plateau-Central and Eastern China,and China-Southeast Asia interfaces.First,pollutant distributionwas analyzed.Kunming,frequently clouded and misty,exhibited consistently high aerosol optical depth throughout the year.In Qingdao and Shanghai,NO_(2)and SO_(2),as well as SO_(2)in Xi’an,increased in winter.Elevated HCHO in summer in Shanghai and Xi’an,especially Xi’an,suggests potential ozone pollution issues.Subsequently,pollutant transportation across interfaces was studied.At the Eastern China-Ocean interface,the gas transport flux was the largest among other interfaces,with the outflux exceeding the influx,especially in winter and spring.The input of pollutants from the Tibetan Plateau to central-eastern Chinawas larger than the output in winter and spring,with SO_(2)having the highest transport flux in winter.The pollution input from Southeast Asia to China significantly exceeded the output,with spring and winter inputs being 3.22 and 3.03 times the output,respectively.Lastly,the transportation characteristics of a pollution event at Kunming were studied.During this period,pollutants were transported from west to east,with themaximum SO_(2)transport flux at an altitude of 2.87 km equaling 27.74μg/(m^(2)·s).It is speculated that this pollution was caused by the transport from Southeast Asian countries to Kunming.

关 键 词：Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) POLLUTANTS Spatiotemporal distribution Transboundary transport 

分 类 号：F42[经济管理—产业经济]