Observation on the aerosol and ozone precursors in suburban areas of Shenzhen and analysis of potential source based on MAX-DOAS  

作　　者：Hairong Zhang Ang Li Zhaokun Hu Hongmei Ren Hongyan Zhong Jianfeng Guo Long Yun Mingdi Zhang 

机构地区：[1]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 [2]University of Science and Technology of China,Hefei 230026,China [3]Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China [4]Shenzhen Environmental Monitoring Center Station,Shenzhen 518049,China

出　　处：《Journal of Environmental Sciences》2023年第10期109-121,共13页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.41775029);the National Key Research and Development Project of China(No.2018YFC0213201);the Science and Technology Commission of Shanghai Municipality(No.17DZ1203102).

摘　　要：Long-term stereoscopic observations of aerosol,NO2,and HCHO were carried out at the Yangmeikeng(YMK)site in Shenzhen.Aerosol optical depths and NO2 vertical column concentration(NO2 VCD)derived from MAX-DOAS were found to be consistent with other datasets.The total NO2 VCD values of the site remained low,varying from 2×10^(15)to 8×10^(15)mol/cm^(2),while the HCHO VCD was higher than NO2 VCD,varying from 7×10^(15)to 11×10^(15)mol/cm^(2).HCHO VCD was higher from September to early November than that was from mid-late November to December and during February 2021,in contrast,NO2 VCD did not change much during the same period.In January,NO2 VCD and HCHO VCD were both fluctuating drastically.High temperature and HCHO level in the YMK site is not only driving the ozone production up but alsomay be driving up the ozone concentration as well,and the O_(3)production regime in the YMK site tends to be NOx-limited.At various altitudes,backward trajectory clustering analysis and Potential Source Contribution Function(PSCF)were utilized to identify possible NO2 and HCHO source locations.The results suggested that the Huizhou-Shanwei border and the Daya Bay Sea area were the key potential source locations in the lower(200 m)and middle(500 m)atmosphere(WPSCF>0.6).The WPSCF valuewas high at the 1000maltitude whichwas closer to the YMKsite than the near ground,indicating that the pollution transport capability in the upper atmosphere was limited.

关 键 词：Multi-axial differential optical absorption spectroscopy (MAX-DOAS) Nitrogen dioxide(NO2) Formaldehyde(HCHO) Potential source contribution function(PSCF) 

分 类 号：X51[环境科学与工程—环境工程]