Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities

Abstract China has been suffering from serious air pollution for years in response to the rapid industrialization and urbanization. Notably Beijing is one of the most polluted capitals in the world. Hence, the focus of the study area is on Beijing. In the first stage, we analyze spatial and temporal...

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Autores principales:	Lei Jiang, Ling Bai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f53e920829e64e82ab8f9ab201afb889
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id	oai:doaj.org-article:f53e920829e64e82ab8f9ab201afb889
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spelling	oai:doaj.org-article:f53e920829e64e82ab8f9ab201afb8892021-12-02T11:40:53ZSpatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities10.1038/s41598-017-18107-12045-2322https://doaj.org/article/f53e920829e64e82ab8f9ab201afb8892018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-18107-1https://doaj.org/toc/2045-2322Abstract China has been suffering from serious air pollution for years in response to the rapid industrialization and urbanization. Notably Beijing is one of the most polluted capitals in the world. Hence, the focus of the study area is on Beijing. In the first stage, we analyze spatial and temporal characteristics of air pollution of the 6 cities while in the second stage the Granger causality test is applied to investigate whether air pollution of a city is affected by its neighbors, and vice versa. The findings are the following. Overall, AQI values are high in winter and early spring while low in summer and autumn. Among the 6 cities, Baoding is the major contributor to air pollution in this entire area. Besides, Granger causality test results show that there is a unidirectional relationship running from Baoding to Beijing and a bidirectional relationship between Beijing and Tianjin. In other words, apart from local air pollutants, for example, exhaust gas, air quality of Beijing is affected by air pollution of Tianjin, and vice versa. However, regarding the relationship between Beijing and Baoding, air quality of Beijing is just affected by air pollution of Baoding, since Baoding is much polluted than Beijing.Lei JiangLing BaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lei Jiang Ling Bai Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities
description	Abstract China has been suffering from serious air pollution for years in response to the rapid industrialization and urbanization. Notably Beijing is one of the most polluted capitals in the world. Hence, the focus of the study area is on Beijing. In the first stage, we analyze spatial and temporal characteristics of air pollution of the 6 cities while in the second stage the Granger causality test is applied to investigate whether air pollution of a city is affected by its neighbors, and vice versa. The findings are the following. Overall, AQI values are high in winter and early spring while low in summer and autumn. Among the 6 cities, Baoding is the major contributor to air pollution in this entire area. Besides, Granger causality test results show that there is a unidirectional relationship running from Baoding to Beijing and a bidirectional relationship between Beijing and Tianjin. In other words, apart from local air pollutants, for example, exhaust gas, air quality of Beijing is affected by air pollution of Tianjin, and vice versa. However, regarding the relationship between Beijing and Baoding, air quality of Beijing is just affected by air pollution of Baoding, since Baoding is much polluted than Beijing.
format	article
author	Lei Jiang Ling Bai
author_facet	Lei Jiang Ling Bai
author_sort	Lei Jiang
title	Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities
title_short	Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities
title_full	Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities
title_fullStr	Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities
title_full_unstemmed	Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities
title_sort	spatio-temporal characteristics of urban air pollutions and their causal relationships: evidence from beijing and its neighboring cities
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/f53e920829e64e82ab8f9ab201afb889
work_keys_str_mv	AT leijiang spatiotemporalcharacteristicsofurbanairpollutionsandtheircausalrelationshipsevidencefrombeijinganditsneighboringcities AT lingbai spatiotemporalcharacteristicsofurbanairpollutionsandtheircausalrelationshipsevidencefrombeijinganditsneighboringcities
_version_	1718395557649580032

Spatio-temporal characteristics of urban air pollutions and their causal relationships: Evidence from Beijing and its neighboring cities

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