DOI: 10.1007/s00382-014-2438-4
Scopus记录号: 2-s2.0-84943758881
论文题名: Impacts of warming and water vapor content on the decrease in light rain days during the warm season over eastern China
作者: Wu J. ; Zhang L. ; Zhao D. ; Tang J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-07-08 起始页码: 1841
结束页码: 1857
语种: 英语
英文关键词: Eastern China
; Light rain reduction
; Warming
; Water vapor content
英文摘要: Based on daily rainfall data collected at 395 gauge stations over eastern China during 1979–2009, the variation in light rain days with intensities of 0.1–10 mm day−1 in the summer half of the year was analyzed. Results indicate that both the light rain amount and the number of light rain days decline distinctly, with trends of −4.89 mm (10 year)−1 and −2.48 days (10 year)−1, respectively. The first two principal components of EOF analysis on light rain days not only show a long-term decrease, but also depict regional differences; specifically, light rain days decline more distinctly in northeastern and southern regions of eastern China. Spatial and temporal features, as well as the periods derived from the EOF analysis of temperature, precipitable water content, and relative humidity in the lower troposphere, coincide with those of light rain days. Composite analysis also suggests that there are fewer light rain days in years with lower relative humidity and precipitable water content in the lower troposphere, while there are fewer light rain days in years with higher tropospheric temperatures. According to the Clausius–Clapeyron equation and the relative humidity equations, relative humidity over eastern China during the period studied decreases by 5.5 % due to lower-tropospheric warming, and decreases by 0.16 % because of the decrease in specific humidity in the same period. Both warming and water vapor content are the reasons for light rain reduction, and warming is deemed the primary cause. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54007
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric Science, Yunnan University, Kunming, China; Yunnan Institute of Geography, Kunming, China; Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Department of Atmospheric Science, Nanjing University, Nanjing, China
Recommended Citation:
Wu J.,Zhang L.,Zhao D.,et al. Impacts of warming and water vapor content on the decrease in light rain days during the warm season over eastern China[J]. Climate Dynamics,2015-01-01,45(2017-07-08)