Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin

Sichuan Basin is one of the most densely populated areas in China and the world. Human activities have great impact on the air quality. In order to understand the characteristics of overall air pollutants in Sichuan Basin in recent years, we analyzed the concentrations of six air pollutants monitore...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Chunsheng Fang, Xiaodong Tan, Yue Zhong, Ju Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	air pollution spatio-temporal variations Sichuan Basin back-trajectory Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/4284c856545b48bba671ad95342231b6
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:4284c856545b48bba671ad95342231b6
record_format	dspace
spelling	oai:doaj.org-article:4284c856545b48bba671ad95342231b62021-11-25T16:45:39ZResearch on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin10.3390/atmos121115042073-4433https://doaj.org/article/4284c856545b48bba671ad95342231b62021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1504https://doaj.org/toc/2073-4433Sichuan Basin is one of the most densely populated areas in China and the world. Human activities have great impact on the air quality. In order to understand the characteristics of overall air pollutants in Sichuan Basin in recent years, we analyzed the concentrations of six air pollutants monitored in 22 cities during the period from January 2015 to December 2020. During the study period, the annual average concentrations of CO, NO<sub>2</sub>, SO<sub>2</sub>, PM<sub>2.5</sub> and PM<sub>10</sub> all showed a clear downward trend, while the ozone concentration was slowly increasing. The spatial patterns of CO and SO<sub>2</sub> were similar. High-concentration areas were mainly located in the western plateau of Sichuan Basin, while the concentrations of NO<sub>2</sub> and particulate matter were more prominent in the urban agglomerations inside the basin. During the study period, changes of the monthly average concentrations for pollutants (except for O<sub>3</sub>) conformed to the U-shaped pattern, with the highest in winter and the lowest in summer. In the southern cities of the basin, secondary sources had a higher contribution to the generation of fine particulate matter, while in large cities inside the basin, such as Chengdu and Chongqing, air pollution had a strong correlation with automobile exhaust emissions. The heavy pollution incidents observed in the winter of 2017 were mainly caused by the surrounding plateau terrain with typical stagnant weather conditions. This finding was also supported by the backward trajectory analysis, which showed that the air masses arrived in Chengdu were mainly from the western plateau area of the basin. The results of this study will provide a basis for the government to take measures to improve the air quality in Sichuan Basin.Chunsheng FangXiaodong TanYue ZhongJu WangMDPI AGarticleair pollutionspatio-temporal variationsSichuan Basinback-trajectoryMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1504, p 1504 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	air pollution spatio-temporal variations Sichuan Basin back-trajectory Meteorology. Climatology QC851-999
spellingShingle	air pollution spatio-temporal variations Sichuan Basin back-trajectory Meteorology. Climatology QC851-999 Chunsheng Fang Xiaodong Tan Yue Zhong Ju Wang Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin
description	Sichuan Basin is one of the most densely populated areas in China and the world. Human activities have great impact on the air quality. In order to understand the characteristics of overall air pollutants in Sichuan Basin in recent years, we analyzed the concentrations of six air pollutants monitored in 22 cities during the period from January 2015 to December 2020. During the study period, the annual average concentrations of CO, NO<sub>2</sub>, SO<sub>2</sub>, PM<sub>2.5</sub> and PM<sub>10</sub> all showed a clear downward trend, while the ozone concentration was slowly increasing. The spatial patterns of CO and SO<sub>2</sub> were similar. High-concentration areas were mainly located in the western plateau of Sichuan Basin, while the concentrations of NO<sub>2</sub> and particulate matter were more prominent in the urban agglomerations inside the basin. During the study period, changes of the monthly average concentrations for pollutants (except for O<sub>3</sub>) conformed to the U-shaped pattern, with the highest in winter and the lowest in summer. In the southern cities of the basin, secondary sources had a higher contribution to the generation of fine particulate matter, while in large cities inside the basin, such as Chengdu and Chongqing, air pollution had a strong correlation with automobile exhaust emissions. The heavy pollution incidents observed in the winter of 2017 were mainly caused by the surrounding plateau terrain with typical stagnant weather conditions. This finding was also supported by the backward trajectory analysis, which showed that the air masses arrived in Chengdu were mainly from the western plateau area of the basin. The results of this study will provide a basis for the government to take measures to improve the air quality in Sichuan Basin.
format	article
author	Chunsheng Fang Xiaodong Tan Yue Zhong Ju Wang
author_facet	Chunsheng Fang Xiaodong Tan Yue Zhong Ju Wang
author_sort	Chunsheng Fang
title	Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin
title_short	Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin
title_full	Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin
title_fullStr	Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin
title_full_unstemmed	Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin
title_sort	research on the temporal and spatial characteristics of air pollutants in sichuan basin
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4284c856545b48bba671ad95342231b6
work_keys_str_mv	AT chunshengfang researchonthetemporalandspatialcharacteristicsofairpollutantsinsichuanbasin AT xiaodongtan researchonthetemporalandspatialcharacteristicsofairpollutantsinsichuanbasin AT yuezhong researchonthetemporalandspatialcharacteristicsofairpollutantsinsichuanbasin AT juwang researchonthetemporalandspatialcharacteristicsofairpollutantsinsichuanbasin
_version_	1718413014186590208

Research on the Temporal and Spatial Characteristics of Air Pollutants in Sichuan Basin

Ejemplares similares