Arctic Sea Ice Decline Intensified Haze Pollution in Eastern China
Arctic Sea Ice Decline Intensified Haze Pollution in Eastern China
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DOI：
10.3878/aosl20140081
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发表时间：
2015-01-01
影响因子：
2.3
通讯作者：
Liu Jiping
中科院分区：
文献类型：
--
作者：
Wang Hui-Jun;Chen Huo-Po;Liu Jiping
近年来，中国东部的空气质量越来越令人担忧，雾霾现在是头号空气污染问题。研究结果表明，北极海冰的减少是造成中国东部灰霾日数增加的重要原因。结果表明，1979-2012年中国东部地区冬季霾日数与前期秋季ASI呈显著负相关，ASI可解释冬季霾日数年际-年代际变化的45%-67%。继前人关于ASI损失对北方半球气候影响的研究之后，作者的研究进一步揭示，秋季ASI的减少导致欧亚大陆中纬度海平面气压正异常，中国气旋活动路径北移，冬季中国东部北纬40度以南地区罗斯比波活动较弱。这些环流变化有利于中国东部地区气旋活动减少，大气稳定性增强，从而导致中国东部地区霾日增多。此外，东亚地区尤其是中国东部地区秋季ASI和WHD的环流变化模式非常一致。作者认为，在全球变暖的情况下，随着ASI的下降，雾霾污染在不久的将来可能会继续成为一个严重的问题。
Air quality in eastern China has becoming more and more worrying in recent years, and haze is now No. 1 air pollution issue. Results in this study show the decreasing Arctic sea ice (ASI) is an important contributor to the recent increased haze days in eastern China. The authors find that the number of winter haze days (WHD) in eastern China is strongly negatively correlated with the preceding autumn ASI during 1979-2012, and about 45%-67% of the WHD interannual to interdecadal variability can be explained by ASI variability. Following previous studies on the impact of ASI loss on the northern hemisphere climate, the authors' studies further reveal that the reduction of autumn ASI leads to positive sea-level pressure anomalies in mid-latitude Eurasia, northward shift of track of cyclone activity in China, and weak Rossby wave activity in eastern China south of 40 degrees N during winter season. These atmospheric circulation changes favor less cyclone activity and more stable atmosphere in eastern China, leading to more haze days there. Furthermore, the patterns of circulation changes associated with autumn ASI and WHD are in very good agreement over the East Asia, particularly in eastern China. The authors suggest that haze pollution may continue to be a serious issue in the near future as the decline of ASI continues under global warming.