Study of Persistent Haze Pollution in Winter over Jinan (China) Based on Ground-Based and Satellite Observations

Remote Sensing

Peitao Zhao¹  Wei Gong²  Yuefeng Zhao³  Hui Li³  Rui Shi⁴  Boming Liu⁵  Shikuan Jin⁵  Ruonan Fan⁵  Weiyan Wang⁵  Yiqun Zhang⁵ 

[1] Meteorological Observation Centre, China Meteorological Administration, Beijing 100081, China;School of Electronic Information, Wuhan University, Wuhan 430072, China;Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China;Shandong Provincial Lunan Geo-Engineering Exploration Institute (The Second Geological Brigade of Shandong Provincial Bureau of Geology & Mineral Resources), Jining 272100, China;State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430072, China;

关键词: haze pollution;    satellite;    lidar;    dust transport;    East China;   

DOI  :  10.3390/rs13234862

来源: DOAJ

【 摘 要 】

A comprehensive study of the formation process of haze events in the Jinan area of China during winter is conducted based on the ground-based and satellite observation data from 1 December 2020 to 12 January 2021. According to variation of pollutant concentrations, two typical types of haze pollution are found in the Jinan area. During the type 1 haze pollution, the PM_2.5 concentrations are greater than 75 $\mathsf{\mu }$gm⁻³ and less than 115 $\mathsf{\mu }$gm⁻³ with a short duration. The haze is mainly caused by local pollutant emissions and the accumulation of pollutants transported from areas around Jinan. By contrast, type 2 haze pollution episodes have a long duration and peak PM_2.5 concentrations between 150 $\mathsf{\mu }$gm⁻³ and 250 $\mathsf{\mu }$gm⁻³, which is considered heavy pollution. Type 2 haze pollution is mainly caused by a mixture of long-range transported dust with locally emitted pollutants. Moreover, the unfavorable meteorological factors such as stable inversion layer, continuous cold high-pressure system, high relative humidity, and low wind speed play an important role in the formation of both types of haze pollution. In addition, there are significant photochemical processes during the haze pollutions. According to satellite data, the AOD in Jinan and surrounding areas is maintained at a high-level during haze pollution. It indicates that the local pollution is often accompanied by regional pollution during haze pollution events. This study reveals the formation process of haze pollution and promotes the study of regional climate change, which can provide guidance to the government in the prevention and control of haze pollution in East China.

【 授权许可】

Unknown