华东师范大学学报(自然科学版) ›› 2008, Vol. 2008 ›› Issue (2): 1-7.

• 地理学 河口海岸学 •    下一篇

青藏高原上中尺度对流系统东移的热力场特征

  

  1. 华东师范大学 地理信息科学教育部重点实验室，上海200062
  • 收稿日期:2006-12-06 修回日期:2007-03-16 出版日期:2008-03-25 发布日期:2008-03-25
  • 通讯作者: 过仲阳

Study on the features of thermodynamic field influencing MCSs trajectories over the Tibetan Plateau(Chinese)

GUO Zhong-yang, GAN Jia-yuan, DAI Xiao-yan, GUO Ya-fen, LI Wei

  

  1. Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai200062, China
  • Received:2006-12-06 Revised:2007-03-16 Online:2008-03-25 Published:2008-03-25
  • Contact: GUO Zhong-yang

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摘要：

利用国家气象中心高分辨率有限区域分析预报系统产品(HLAFS)中的数值格点预报资料，运用空间数据挖掘中的聚类方法 (K均值法和CLARANS法)，对影响1998年夏季青藏高原上中尺度对流系统（MCSs）东移的热力场的空间分布特征进行了研究，得到了有利于MCSs移动和传播的热力学条件.结果表明，MCSs周边热力场中的温度场、湿度场以及水汽通量散度场空间分布特征的变化可以为MCSs发展和演变的预测提供重要线索，从而为探讨高原上MCSs的移动规律，揭示其发生和发展的机理提供了一种有效的新途径.

关键词: 青藏高原, 中尺度对流系统, 热力场, 空间聚类, 青藏高原, 中尺度对流系统, 热力场, 空间聚类

Abstract: Clustering methods of K-means and CLARANS were applied to analyze the spatial distribution features of the thermodynamic field that influenced Mesoscale Convective Systems (MCSs) moving eastward out of the Tibetan Plateau from June to August in 1998, using data from the high resolution limited area analysis and forecasting system (HLAFS) provided by China National Meteorological Center; and the thermodynamic conditions favoring the trajectories and propagations of MCSs were obtained. The results indicate that the changes of the spatial distribution features of temperature field, humidity field and water vapor flux divergence field are essential factors to predict the development and evolution of MCSs.

Key words: mesoscale convective systems, thermodynamic field, spatial clustering, Tibetan Plateau, mesoscale convective systems, thermodynamic field, spatial clustering

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