HAO Li-Sheng1,2, MIN Jin-Zhong1, DING Yi-Hui3
.2011.Analysis of precipitation events changes and causes for rainstorm events reduction in North China.Chinese Journal Of Geophysics,54(5): 1160-1167,doi: 10.3969/j.issn.0001-5733.2011.05.003
Analysis of precipitation events changes and causes for rainstorm events reduction in North China
HAO Li-Sheng1,2, MIN Jin-Zhong1, DING Yi-Hui3
1. School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Hebei Climate Center, Shijiazhuang 050021, China;
3. National Climate Center, Beijing 100081, China
Abstract：Based on the daily precipitation data of 1961~2008 from 37 meteorological stations and NCEP, ECMWF reanalysis grid data, the precipitation events change and rainstorm events reduction occurred in North China were analyzed. The results show that mid-summer rainstorm event has a great impact on the summer precipitation and annual precipitation in North China during recent 50 years. Mid-summer rainstorm events showed significant linear decreasing trend, which was related with water vapor flux reduction into North China through the south border caused by the weakening of East Asian summer monsoon. In addition, mid-summer rainstorm events reduction is also well correlated with the weakening of India convection and the enhancing of Philippine convection, as well as the weakening of 125°E cross-equatorial flow and the strengthening of 145°E cross-equatorial flow. This provides an understanding of precipitation reduction in North China.
[1] 叶笃正,黄荣辉. 长江黄河流域旱涝规律和成因研究.济南:山东科学技术出版社,1996.387 Ye D Z,Huang R H. Studies on Regularity and Cause of Droughts and Floods in the Yangtze River Valley and the Yellow River Valley (in Chinese).Jinan:Shandong Science and Technology Press,1996.387
[2] 徐桂玉,杨修群,孙旭光.华北降水年代际、年际变化特征与北半球大气环流的联系. 地球物理学报, 2005,48(3):511~518 图8 华北盛夏1000 hPa层越赤道气流 (a) 多年平均水平风速,阴影区经向风速>2 m·s-1;(b) 50°E (粗实线)、90°E(细实线)、110°E(虚线) 越赤道气流风速变化;(c) 125°E (细实线)、145°E(粗实线)越赤道气流风速变化,虚线是线性趋势. Fig.8 1000 hPa cross-equatorial flow of mid-summer in North China (a) Spatial distribution of multi-year averaged mid-summer wind speed, shade for meridional wind speed> 2 m·s-1; (b) Variation of the cross-equatorial flow wind speed in 50°E (thick solid line), 90°E (thin solid line), 110°E (dotted line); (c) Variation of the cross- equatorial flow wind speed in 125°E (thin solid line), 145°E (thick solid line), dashed line for linear trend. Xu G Y,Yang X Q,Sun X G. Interdecadal and interannual variation characteristics of rainfall in North China and its relation with the northern hemisphere atmospheric circulations. Chinese J. Geophys. (in Chinese),2005, 48(3):511~518
[3] 杨修群,谢倩,朱益民等.华北降水年代际变化特征及相关的海气异常型. 地球物理学报,2005, 48(4):789~797 Yang X Q,Xie Q,Zhu Y M,et al. Decadal-to-interdecadal variability of precipitation in North China and associated atmospheric and oceanic anomaly patterns. Chinese J. Geophys. (in Chinese),2005, 48(4):789~797
[4] 黄荣辉,徐予红,周连童.我国夏季降水的年代际变化及干旱化趋势. 高原气象,1999,18(4):465~476 Huang R H,Xu Y H,Zhou L T. The interdecadal variation of summer precipitations in China and the drought trend in North China. Plateau Meteorology (in Chinese),1999, 18(4):465~476
[5] 张庆云. 1880年以来华北降水及水资源的变化. 高原气象,1999, 18(4):486~495 Zhang Q Y. The variation of the precipitation and water resources in North China since 1880. Plateau Meteorology (in Chinese),1999,18(4):486~495
[6] 彭京备,陈烈庭,张庆云. 青藏高原异常雪盖和ENSO的多尺度变化及其与中国夏季降水的关系. 高原气象,2005,24(3):366~377 Peng J B, Chen L T, Zhang Q Y. Multi-scale variations of snow cover over QXP and tropical Pacific SST and their influences on summer rainfall in China. Plateau Meteorology (in Chinese),2005, 24(3):366~377
[7] 张人禾. El Nino盛期印度夏季风水汽输送在我国华北地区夏季降水异常中的作用. 高原气象,1999,18(4):567~574 Zhang R H. The role of Indian summer monsoon water vapor transportation on the summer rainfall anomalies in the northern part of China during the El Nino mature Phase. Plateau Meteorology (in Chinese),1999, 18(4):567~574
[8] 郝立生,闵锦忠,姚学祥.华北和印度夏季风降水变化的对比分析. 气候变化研究进展,2007,3(5): 271~275 Hao L S, Min J Z, Yao X X. Comparison of summer monsoon rainfall changes in North China and in India. Advances in Climate Change Research (in Chinese),2007,3(5): 271~275
[9] 丁一汇,刘芸芸. 亚洲~太平洋季风区的遥相关研究. 气象学报,2008,66(5):670~682 Ding Y H,Liu Y Y.A Study of the teleconnection in the Asian-Pacific monsoon region. Acta Meteorologica Sinica (in Chinese),2008,66(5):670~682
[10] IPCC.Climate Change 2007:The Physical Science Basis.Contribution of Working Group l to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.Cambridge,United Kingdom and New York.NY,USA: Cambridge University Press,2007.996
[11] Kalnay E, Kanamitsu M, Kistler R, et al. The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 1996,77(3): 437~471
[12] Wang Hui-Jun.Instability of the East Asian summer monsoon-ENSO relations. Advances in Atmospheric Sciences,2002,19(1):1~11
[13] Chen H,Ding Y H, He J H. Reappraisal of Asian summer monsoon indices and the long-term variation of monsoon. Acta Meteorologica Sinica,2007,21(2):168~178
[14] 竺可桢.东南季风与中国之雨量.地理学报,1934,1(1):1~27 Zhu K Z.The enigma of southeast monsoon in China.Acta Geographica Sinica (in Chinese),1934,1(1):1~27
[15] Ding Y H,Johnny C L Chan.The east Asian summer monsoon:an overview. Meteorol. Atmos. Phys., 2005, 89(1):117~142
[16] Wang B,Wu Z W,Li J P,et al.How to measure the strength of the east Asian summer monsoon. Journal of Climate,2008,21(17):4449~4463
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