Advances in Atmospheric Sciences

, Volume 21, Issue 5, pp 802–813 | Cite as

Diagnostic study on the structural characteristics of a typical mei-yu front system and its maintenance mechanism

  • Jiang Jianying
  • Ni Yunqi


In this paper, a typical mei-yu front process with heavy rainfall from June 12 to 15 in 1998 is analyzed. The results show that the mei-yu front is a front system which consists of an iso-θ e dense area with strong horizontal gradient, a deep-convective cloud tower band, a passageway transporting warm and moist air flow from the summer monsoon surge in the mid and low levels to the south of the mei-yu front, and a migrating synoptic scale trough to the north of the mei-yu front, which transports cold and dry air southward in the mid and upper levels. The maintenance of the mei-yu front is realized by: (1) is a positive feedback between the moist physical process enhancing frontogenesis and the development of the strong convective system in front of the mei-yu front; (2) the sustaining system to the north of the mei-yu front which is a migrating synoptic scale trough transporting cold and dry air to the mei-yu front and positive vorticity to the mesoscale system in front of the mei-yu front.

Key words

mei-yu front structural characteristics maintenance mechanism moist physical process 


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  1. Chen, S., Y. H. Kuo, W. Wang, Z. Tao, and B. Cui, 1998: A modeling case study of heavy rainstorms along the Mei-yu front.Mon. Wea. Rev.,126, 2330–2351.CrossRefGoogle Scholar
  2. Cheng Minghu, 1999: Remoting analysis synthetically of mesoscale heavy rainfall.Proc. of abstracts in the symposia on heavy rainfall (flooding) in 1998, Hangzhou, 194. (in Chinese)Google Scholar
  3. Ding Yi hui, 1991:Monsoon over China. Kluwer Academic Publisher, 419pp.Google Scholar
  4. Ding Yihui, 1993:Study on the Persistent Heavy Rainfall in the Yangtze-Huaihe River Basin in 1991. China Meteorological Press, Beijing, 255pp. (in Chinese)Google Scholar
  5. Gu Zhenchao, 1953: Discussions of the front properties in subtropic and problems about fronts in middle and South China.Acta Meteorologica Sinica,24, 28–32. (in Chinese)Google Scholar
  6. Jiang Jianying, and Ni Yunqi, 2003: A diagnostic study to the multi-scale characteristics of a Mei-yu front heavy rainfall process in 1998.Acta Meteorologica Sinica,61(6), 673–683. (in Chinese)Google Scholar
  7. National Meteorology Center and National Satellite Meteorology Center, 1999:’98 Flooding and Weather Forecast in China. China Meteorological Press, Beijing, 382pp. (in Chinese)Google Scholar
  8. Ninomiya, K., 1984: Characteristics of Baiu front as a predominant subtropical front in the summer Northern Hemisphere.J. Meteor. Soc. Japan,62, 880–894.Google Scholar
  9. Ninomiya, K., 1999: Moisture balance over China and the South China Sea during the summer monsoon in 1991 in relation to the intense rainfalls over China.J. Metero. Soc. Japan,77, 737–751.Google Scholar
  10. Ninomiya, K., 2000: Largeand meso-α-scale characteristics of Mei-yu/Baiu front associated with intense rainfalls in 1–10 July 1991.J. Meteor. Soc. Japan.,78, 141–157.Google Scholar
  11. Ninomiya, K., 2001: Large shaped cloud zone formed around July 6, 1991 with pole-ward moisture transport from intense rainfall area in Mei-yu-Baiu front.J. Meteror. Soc. Japan,79, 806–813.Google Scholar
  12. Ninomiya, K., and H. Muraki, 1986: Large-scale circulation over the East Asia during Baiu period of 1979.J. Meteror. Soc. Japan,64, 409–429.Google Scholar
  13. Sun Shuqing, and Du Changxuan, 1996: The maintenance of Mei-yu front and development associated disturbance.Journal of Applied Meteorological Science,7(2), 153–159. (in Chinese)Google Scholar
  14. Tao Shiyan, and Coauthors, 2001:Research on the Formation Mechanism and the Prediction of the Heavy Rainfall in Summer, 1998 in China. China Meteorological Press. Beijing, 184pp. (in Chinese)Google Scholar
  15. Wang Chunming, Wu Rongsheng, and Wang Yuan, 2002: Interaction of diabatic frontogenesis and moisture processes in cold-frontal rain-band.Adv. Atmos. Sci.,19(3), 544–561.CrossRefGoogle Scholar
  16. Wang Jianjie, and Li Zechun, 2002: Numerical simulation and diagnostic analysis on mesoscale convective system of a torrential rain case in Mei-yu period 1998.Acta Meteorologica Sinica,60(2), 146–155. (in Chinese)Google Scholar
  17. Wang Jianjie, and Tao Shiyan, 2002: Structure and formation of Mei-yu front in 1998.Journal of Applied Meteorological Science,13(5), 526–534. (in Chinese)Google Scholar
  18. Wu Guoxiong, Cai Yaping, and Tang Xiaojing, 1995: Moist potential vorticity development.Acta Meteorologica Sinica,63(4), 387–405. (in Chinese)Google Scholar
  19. Xie Yibin, 1956: An investigation of several rainfall systems during summertime in China.Proc. Central Meteorology Administration, 1–24. (in Chinese)Google Scholar
  20. Yang Yuanqin, Zhang Guangzhi, and Wang Jizhi, 1998: A double front structure of Mei-yu front associated with flooding season of Yangtze River in July 1998. GAME/HUBEX Project Office, 8–11.Google Scholar
  21. Zhang Bingchen, 1990:Study on the Heavy Rainfall Along the Mei-yu Front in the Middle and Lower Reaches of the Yangtze River. China Meteorological Press, Beijing, 269pp. (in Chinese)Google Scholar
  22. Zhang, Q., K. H. Lau, Y. H. Guo, and S. Chen, 2003: A numerical study of a mesoscale convective system over the Taiwan strait.Mon. Wea. Rev.,131, 1150–1170.CrossRefGoogle Scholar
  23. Zhang Xiaoling, Tao Shiyan, and Zhang Qingyun, 2002: Structure of Mei-yu front in 1998.Journal of Applied Meteorological Science,13(3), 257–268. (in Chinese)Google Scholar
  24. Zhou Yushu, 2002: Study of the space structure features and its forming mechanism of the Mei-yu front system and moist potential vorticity anomaly. Ph. D dissertation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing. 189pp. (in Chinese)Google Scholar

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© Advances in Atmospheric Sciences 2004

Authors and Affiliations

  • Jiang Jianying
    • 1
  • Ni Yunqi
    • 2
  1. 1.Department of Atmospheric SciencesNanjing UniversityNanjing
  2. 2.Chinese Academy of Meteorological SciencesBeijing

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