caa a22 4500 605471533 CHVBK 20210128100333.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00382-014-2438-4 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2438-4 Impacts of warming and water vapor content on the decrease in light rain days during the warm season over eastern China [Elektronische Daten] [Jian Wu, Liya Zhang, Deming Zhao, Jianping Tang] 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 0.1-10mmday−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 −4.89mm (10year)−1 and −2.48days (10year)−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. Springer-Verlag Berlin Heidelberg, 2014 Light rain reduction nationallicence Warming nationallicence Water vapor content nationallicence Eastern China nationallicence Wu Jian Department of Atmospheric Science, Yunnan University, 650091, Kunming, People's Republic of China aut Zhang Liya Department of Atmospheric Science, Yunnan University, 650091, Kunming, People's Republic of China aut Zhao Deming Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing, People's Republic of China aut Tang Jianping Department of Atmospheric Science, Nanjing University, 210093, Nanjing, People's Republic of China aut Climate Dynamics Springer Berlin Heidelberg 45/7-8(2015-10-01), 1841-1857 0930-7575 45:7-8<1841 2015 45 382 https://doi.org/10.1007/s00382-014-2438-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2438-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu Jian Department of Atmospheric Science, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Liya Department of Atmospheric Science, Yunnan University, 650091, Kunming, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Deming Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Tang Jianping Department of Atmospheric Science, Nanjing University, 210093, Nanjing, People's Republic of China aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/7-8(2015-10-01), 1841-1857 0930-7575 45:7-8<1841 2015 45 382