Journal of East China Normal University(Natural Sc ›› 2008, Vol. 2008 ›› Issue (2): 1-7.

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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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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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