Characteristics of Climate Change with Respect to Fog Days and Haze Days in China in the Past 40 Years
Characteristics of Climate Change with Respect to Fog Days and Haze Days in China in the Past 40 Years
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发表时间：
2013
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通讯作者：
Sun Yu
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作者：
Sun Yu
利用1971-2010年中国567个测站的雾和霾观测资料，分析了中国雾和霾日数的总体分布及其季节和年代际变化。采用旋转经验正交函数对我国雾日进行气候分类。结果表明：（1）雾日主要分布在东南沿海、四川盆地、湘黔交界、山东沿海和云南南部。霾日主要集中在华北、河南、珠江三角洲和长江三角洲地区。(2)季节变化表现为：秋季和冬季雾日数和灰霾日数均大于春季和夏季。(3)我国雾日数和霾日数具有明显的年代际变化特征。20世纪70年代至90年代雾日较多，90年代至2010年雾日较少。灰霾日数的年变化趋势从2001年开始呈快速上升趋势。(4)整个中国可以分为10个部分。华北、四川、重庆和长江中下游地区是大雾的主要区域。
Using observed fog and haze data from 567 stations during 1971-2010 in China, the general distribution and the seasonal and decadal variations of fog days and haze days were demonstrated. A rotated empirical orthogonal function was used to classify the fog days in China according to climate. The results show that: (1) Fog days were distributed mainly over the southeastern coastal area, the Sichuan Basin, the border between Hunan and Guizhou, the Shandong coastal area, and southern Yunnan. Haze days were concentrated over North China, Henan, the Pearl River Delta, and the Yangtze River Delta area. (2) Seasonal variations appeared: The numbers of fog days and haze days in autumn and winter are larger than those in spring and summer. (3) Fog days and haze days in China exhibit obvious decadal variations. There are more fog days from the 1970s to the 1990s, and fewer from the 1990s to 2010. The yearly variation trend of haze days was ascending rapidly from 2001. (4) The entire area of China can be divided into 10 parts. The north China, Sichuan, Chongqing, and the middle and lower reaches of the Yangtze River areas are major fog regions.