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Atmosphere 2018, 9(8), 312; https://doi.org/10.3390/atmos9080312

Difference in PM2.5 Variations between Urban and Rural Areas over Eastern China from 2001 to 2015

1
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
2
Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Hong Kong, China
3
Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
4
Department of Mathematics, The Hong Kong University of Science and Technology, Hong Kong, China
5
Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China
*
Author to whom correspondence should be addressed.
Received: 1 June 2018 / Revised: 15 July 2018 / Accepted: 17 July 2018 / Published: 10 August 2018
(This article belongs to the Special Issue Air Quality in China: Past, Present and Future)
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Abstract

To more effectively reduce population exposure to PM2.5, control efforts should target densely populated urban areas. In this study, we took advantage of satellite-derived PM2.5 data to assess the difference in PM2.5 variations between urban and rural areas over eastern China during the past three Five-Year Plan (FYP) periods (2001–2015). The results show that urban areas experienced less of a decline in PM2.5 concentration than rural areas did in more than half of the provinces during the 11th FYP period (2006–2010). In contrast, most provinces experienced a greater reduction of PM2.5 concentration in urban areas than in rural areas during the 10th and 12th FYP periods (2001–2005 and 2011–2015, respectively). During the recent 12th FYP period, the rates of decline in PM2.5 concentration in urban areas were more substantial than in rural areas by as much as 1.5 μg·m−3·year−1 in Beijing and 2.0 μg·m−3·year−1 in Tianjin. These results suggest that the spatial difference in PM2.5 change was conducive to a reduction in the population exposure to PM2.5 in most provinces during recent years. View Full-Text
Keywords: PM2.5; China; urban; rural; exposure PM2.5; China; urban; rural; exposure
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Lin, C.; Lau, A.K.H.; Li, Y.; Fung, J.C.H.; Li, C.; Lu, X.; Li, Z. Difference in PM2.5 Variations between Urban and Rural Areas over Eastern China from 2001 to 2015. Atmosphere 2018, 9, 312.

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