Increasing impact of urban fine particles (PM2.5) on areas surrounding Chinese cities.
Increasing impact of urban fine particles (PM2.5) on areas surrounding Chinese cities.
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城市细颗粒物（PM2.5）对中国城市周边地区的影响日益加大
DOI：
10.1038/srep12467
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发表时间：
2015-07-29
影响因子：
4.6
通讯作者：
Li W
中科院分区：
文献类型：
--
作者：
Han L;Zhou W;Li W
发展中国家快速城市化的负面影响导致城市空气质量恶化，对周边地区（如中国）的负面影响越来越大。然而，迄今为止，对中国城市周边地区的空气污染进行定量评估的研究尚不多见。因此，我们评估了1999 - 2011年中国地级市快速城市化过程中空气污染对周边环境的影响。研究发现：(1)城市环境对周边地区的负面影响越来越大，大城市的pm2.5城乡浓度差异特别大。(2)中国350个地级市中有156个地级市的城市pm2.5污染对周边地区的影响有所增加。这些县主要分布在两个地带：一个是从中国东北到四川，另一个是从上海到广西。我们的研究展示了中国城市空气质量的恶化及其对周边地区的潜在影响。我们希望这里提出的结果将鼓励不同的城市化方法，以减轻城市空气污染造成的负面影响，无论是在中国还是其他快速发展的国家。
The negative impacts of rapid urbanization in developing countries have led to a deterioration in urban air quality, which brings increasing negative impact to its surrounding areas (e.g. in China). However, to date there has been rare quantitative estimation of the urban air pollution to its surrounding areas in China.We thus evaluated the impact of air pollution on the surrounding environment under rapid urbanization in Chinese prefectures during 1999 – 2011. We found that: (1) the urban environment generated increasing negative impact on the surrounding areas and the PM2.5concentration difference between urban and rural areas was particularly high in large cities. (2) Nearly half of the Chinese prefectures (156 out of 350) showed increased impact of urban PM2.5pollution on its surrounding areas. Those prefectures were mainly located along two belts: one from northeast China to Sichuan province, the other from Shanghai to Guangxi province. Our study demonstrates the deterioration in urban air quality and its potential impacts on its surrounding areas in China. We hope that the results presented here will encourage different approaches to urbanization to mitigate the negative impact caused by urban air pollution, both in China and other rapidly developing countries.