Has China been exporting less particulate air pollution over the past decade?
Has China been exporting less particulate air pollution over the past decade?
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DOI：
10.1002/2017gl072617
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发表时间：
2017-03
影响因子：
5.2
通讯作者：
Jianglong Zhang;J. Reid;R. Alfaro-Contreras;P. Xian
中科院分区：
文献类型：
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作者：
Jianglong Zhang;J. Reid;R. Alfaro-Contreras;P. Xian
来自中国的颗粒物（PM）污染向东输送到韩国和日本，并被认为会影响美国西海岸的地表空气质量。然而，遥感研究对于中国排放和运输的近期趋势尚无定论。我们协调了不同的被动遥感观点，发现虽然作为颗粒物污染指标的气溶胶光学厚度（AOT）从观测期开始（2000年）到2006-2007年中国主要沿海流出地区有所增加，但此后AOT下降了10-20%（相对于2007年）。春季、夏季和秋季均出现减少。冬季出口 PM 污染没有改善。
Particulate matter (PM) pollution from China is transported eastward to Korea and Japan and has been suggested to influence surface air quality on the West Coast of the United States. However, remote sensing studies have been inconclusive as to recent trends in Chinese emissions and transport. We reconciled different passive remote sensing points of view and found that while aerosol optical thickness (AOT) as an indicator of particulate pollution has increased from the start of the observation period (2000) to 2006–2007 from the main Chinese coastal outflow regions, since then there has been a 10–20% decrease in AOT (with respect to 2007). Reductions were observed in spring, summer, and fall seasons. No improvement in exported PM pollution is found for the winter season.