热带气旋中β偶极涡的数值模拟

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基金项目: 国家自然科学基金资助项目(49875008)

THE NUMERICAL SIMULATION OFβ-GYRES IN TROPICAL CYCLONE

Meteorological College, P.L.A. University of Science and Technology, Nanjing 211101, China

摘要: 通过数值模拟来研究热带气旋中的β偶极涡环流,结果可见,在中层的偏差流场上,有清晰的β偶极涡环流,即涡旋中心以西为气旋性环流,以东为反气旋性涡旋。理论分析表明,该β偶极涡环流是由地转涡度平流造成的。
- 热带气旋 /
- β偶极涡 /
- 数值模拟
Abstract: In this paper, the circulation of β-gyres in tropical cyclone is studice by use of numerical simulation. The result is that there is clear circulation of β-gyres in the deviation flow field of the middle layer of the model,i.e. there is cyclone current west of the vortex center but anticyclone current east of it. The theory analysis shows that the circulation of β-gyres is formed by the advection of geostrophic vorticity.
- trol cyclone /
- β-gyres /
- numerical simulation

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