Qingchun Guo  This email address is being protected from spambots. You need JavaScript enabled to view it.1,2,3,4, Zhenfang He1,2,5, Zhaosheng Wang6

1 School of Geography and Environment, Liaocheng University, Liaocheng 252000, China
2 Institute of Huanghe Studies, Liaocheng University, Liaocheng 252000, China
3 Key Laboratory of Atmospheric Chemistry, China Meteorological Administration, Beijing 100081, China
4 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
5 State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
6 National Ecosystem Science Data Center, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China


Received: November 27, 2023
Revised: January 9, 2024
Accepted: February 28, 2024

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.230274  


Cite this article:

Guo, Q., He, Z., Wang, Z. (2024). The Characteristics of Air Quality Changes in Hohhot City in China and their Relationship with Meteorological and Socio-economic Factors. Aerosol Air Qual. Res. 24, 230274. https://doi.org/10.4209/aaqr.230274


HIGHLIGHTS

  • The concentration of SO2, PM10, PM2.5, NO2, and CO declined from 2014 to 2022.
  • Reducing air pollutant emissions is beneficial for improving air quality.
  • NO2 plays a significant influence in the formation of O3 and PM2.5.
 

ABSTRACT


Air pollution affects sustainable development of the natural environment and social economy. In this article, the changes in air quality index (AQI) and six air pollutants in Hohhot during 2014–2022 are analyzed. The results imply that the annual average concentrations of five air pollutants (SO2, PM10, PM2.5, NO2, and CO) and AQI values declined year by year over 2014–2022. Compared with 2014, AQI in Hohhot fell by 22.5% in 2022. However, the annual average concentrations of O3 increased year by year. PM2.5 and PM10 were the major factors in influencing AQI. Among the five types of atmospheric pollutants, the relationship between NO2 and O3 is strongest, implying that NO2 plays a significant influence in the formation of O3 and PM2.5. Meteorological and socio-economic factors have a significant impact on air quality. The average wind speed (AWS), average pressure (AP), sulfur dioxide emissions (SOE), nitrogen oxide emissions (NOE), and particulate matter emissions (PME) have a positive effect on changes in air quality. The results provide the information of great importance for the management of air quality in Hohhot City.


Keywords: Air quality, Meteorological factor, Socio-economic factor, PM2.5, O3




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