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Meteorology and Atmospheric Physics

, Volume 67, Issue 1–4, pp 181–198 | Cite as

The role of the heat source of the Tibetan Plateau in the general circulation

  • Du-Zheng Ye
  • Guo-Xiong Wu
Article

Summary

In this paper, the thermal features of the atmosphere over the Tibetan Plateau in summer and their effects on the general circulation are reviewed. Some recent research results are reported. It is shown that the Plateau acts as a heat source in summer. Particularly the strong surface heating makes the air stratification very unstable and produces strong near-surface convergence and positive vorticity and upper layer divergence and negative vorticity. Intense convective activity generated thereby not only maintains such particular large-scale circulation pattern over the Plateau, but also transports large amounts of sensible heat, moisture, chemical pollutants, as well as air with low ozone concentration from near-surface layers to upper layers. A minimum centre of total ozone concentiation and a huge upper layer anticyclone with a warm and moist core are thus observed over the Plateau in summer. The strong divergent flow and anticyclonic vorticity source in the upper atmosphere have a strong influence on the general circulation over the world via meridional as well as longitudinal circulations, and energy, dispersion on a spherical surface. It is shown that the surface sensiole heating of the Plateau is essential for the occurrence of the abrupt seasonal change of the general circulation there, and for the persisten maintenance of the Asian monsoon. It is also reported that the elevated heating of the Tibetan Plateau together with its mechanical forcing cause the early onset of the Asian monsson to happen over the eastern coast of the Bay of Bengal, which then generates a favorable circulation background for the monsoon onset over the South China Sea. The Indian monsoon onset flows aftervards.

Keywords

Ozone Vorticity Tibetan Plateau General Circulation Total Ozone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • Du-Zheng Ye
    • 1
  • Guo-Xiong Wu
    • 1
  1. 1.State Key Lab of Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric PhysicsChinese Academy of ScienceBeijingChina

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