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Excitation of stratospheric planetary waves by the Asian high heating center
  • Jianying Jia
Jianying Jia
School of Atmospheric Science, Nanjing University of Information Science and Technology (NUIST), Nanjing, 210044, China

Corresponding Author:jiajianying@nuist.edu.cn

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We studied the topographic heating center over the Tibetan and Persian plateaus that forms the Asian high to try to understand its effects on circulation in the stratosphere. The results show that the heating center at 300 hPa excites planetary waves which can be propogated into the southern hemisphere. The u wind regression field demonstrates the planetary wave propogates from the northern to the southern hemisphere. Once the planetary wave is propagated to the southern hemisphere, then it forms another three-wave train, which strengthens as it propagates upward. The wave propogation channel is at the upper troposphere above the equator. The results also denote that the heating center of Asian high may contribute to the QBO in the stratosphere which mechanism needs to be argued deeply. These results partially explain why there are planetary waves in the stratosphere of the southern hemisphere.