Black Carbon Amplifies Haze Over the North China Plain by Weakening the East Asian Winter Monsoon
Black Carbon Amplifies Haze Over the North China Plain by Weakening the East Asian Winter Monsoon
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DOI：
10.1029/2018gl080941
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发表时间：
2019-01
影响因子：
5.2
通讯作者：
S. Lou;Yang Yang-Yang;Hailong Wang;Steven J. Smith;Y. Qian;P. Rasch
中科院分区：
文献类型：
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作者：
S. Lou;Yang Yang-Yang;Hailong Wang;Steven J. Smith;Y. Qian;P. Rasch
此前已发现，黑碳(BC)通过稳定行星边界层来加强中国的灰霾。将海洋、海冰和云反馈包含在全球气溶胶-气候模式中，我们发现从北中国平原排放的BC可以输送到海洋，这反过来又改变了云结构和海陆热对比。受此影响，中国平原北部东亚冬季风风速减弱。这种减少会导致空气滞留，从而进一步加剧雾霾。我们的结果表明，除了BC引起的气溶胶与行星边界层之间的局地相互作用外，BC还可以通过海洋、海冰和云的反馈减弱东亚冬季风，从而放大中国平原北部的灰霾。这意味着减少BC排放可能会对中国平原北部的空气质量产生显著的间接好处。
Black carbon (BC) has previously been found to intensify haze in China by stabilizing the planetary boundary layer. With ocean, sea ice, and cloud feedbacks included in a global aerosol‐climate model, we show that BC emitted from the North China Plain can be transported to the oceans, which in turn changes cloud structure and land‐sea thermal contrast. As a result, East Asian winter monsoon wind speeds decrease over the North China Plain. This decrease causes air stagnation that can further intensify haze. Our results suggest that in addition to the local BC‐induced interactions between aerosol and the planetary boundary layer, BC can also amplify haze in the North China Plain by weakening East Asian winter monsoon through ocean, sea ice, and cloud feedbacks. It implies that reducing BC emissions could have significant indirect benefits for air quality in the North China Plain.