DOI: 10.1002/jgrd.50535
论文题名: Effect of the strengthened western Pacific subtropical high on summer visibility decrease over eastern China since 1973
作者: Qu W. ; Wang J. ; Gao S. ; Wu T.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 13 起始页码: 7142
结束页码: 7156
语种: 英语
英文关键词: Eastern China
; trend
; visibility
; Western Pacific subtropical high
Scopus关键词: Air quality
; Climate change
; Tropics
; Anthropogenic emissions
; Climate impacts
; Eastern China
; Meteorological condition
; Meteorological station
; Synoptic systems
; trend
; Western Pacific
; Visibility
; aerosol
; anthropogenic effect
; atmospheric pollution
; emission
; humid environment
; marine pollution
; meteorology
; prediction
; summer
; trend analysis
; East China Sea
; Pacific Ocean
; Pacific Ocean (Subtropical)
英文摘要: Daily visibility (Vis) data from 354 meteorological stations are used to evaluate the seasonal Vis trends over China from 1973 to 2009, which show that Vis decline is most distinct over eastern China in summer, with a trend of -1.4 km per decade or -34% in the 37 years. This rapid decline of summertime Vis is found to be partially associated with the intensification and westward extension of the western Pacific subtropical high (WPSH) that has occurred in recent years. Such a change in the strength and breadth of WPSH has resulted in more days with stable, hot, and humid weather, which is favorable for Vis decrease. Analysis through decomposing the trend of Vis into contributions respectively from days with and without WPSH-type meteorological conditions further shows that the intensification of WPSH leads to more episodes of Vis impairment and amplifies the effect of increased aerosol and precursor emissions on the summertime Vis decline in eastern China. Consequently, the difference of Vis between summer and winter follows a declining trend, although the Vis level in winter is still lower than that in summer. The result of this study underscores the importance of considering not only the variation of anthropogenic emissions, but also the change of climate and synoptic systems in the prediction and regulation of air quality and visibility. Key Points WPSH amplifies summer visibility decrease due to emission over Eastern China Confirms the distinct visibility decrease over Eastern China in summer An observational support of climate impact on visibility in Eastern China ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63570
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Physical Oceanography Laboratory, Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong, Ocean University of China, Qingdao 266100, China; Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States; National Climate Center, China Meteorological Administration, Beijing, China
Recommended Citation:
Qu W.,Wang J.,Gao S.,et al. Effect of the strengthened western Pacific subtropical high on summer visibility decrease over eastern China since 1973[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(13)