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Numerical simulation of the relationship between the anomaly of subtropical high over East Asia and the convective activities in the western tropical Pacific

Abstract

In this paper, a close relationship between the intraseasonal variation of subtropical high over East Asia and the convective activities around the South China Sea and the Philippines is analysed from OLR data.

This relationship is studied by using the theory of wave propagating in a slowly varying medium and by using a quasi-geostrophic, linear, spherical model and the IAP-GCM, respectively. The results show that when the SST is warming around the western tropical Pacific or the Philippines, the convective activities are intensified around the Philippines. As a consequence, the subtropical high will be intensified over East Asia. The computed results also show that when the anomaly of convective activities are caused around the Philippines, a teleconnection pattern of circulation anomalies will be caused over South Asia, East Asia and North America.

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The authors wish to express thanks to Prof. J. M. Wallace of the University of Washington, Prof. E. M. Rasmusson and Prof. J. Shukla of the University of Maryland and Dr. M. Blackmon of NCAR for their valuable discussions in the Joint Japan-U.S. Workshop on the EL Nino-Southern Oscillation Phenomenon. Thanks are also due to Prof. C. R. Mechoso, and Prof. M. Yanai of UCLA, and Prof. J. Horelofthe University of Utah for their helpful comments in the Jacob Bjerknes Symposium on Air-Sea Interactions.

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Ronghui, H., Li, L. Numerical simulation of the relationship between the anomaly of subtropical high over East Asia and the convective activities in the western tropical Pacific. Adv. Atmos. Sci. 6, 202–214 (1989). https://doi.org/10.1007/BF02658016

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  • DOI: https://doi.org/10.1007/BF02658016

Keywords

  • Convective Activity
  • Planetary Wave
  • Subtropical High
  • Teleconnection Pattern
  • Yangtze River Valley