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“93.5”黑风暴扰动能源的诊断分析

Diagnostic Analysis of the Perturbation Sources on the "93.5" Black Storm

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【作者】 宋振鑫程麟生

【Author】 Song Zhenxin Cheng Linsheng(Department of Atmospheric Science, Lanzhou University, 730000, Lanzhou, China)

【机构】 兰州大学大气科学系

【摘要】 利用“93.5”黑风暴中尺度数值模拟资料,根据湿斜压大气的湿扰动能量方程,对“93.5”黑风暴发展过程中有效位能和湿扰动动能源的贡献进行了数值诊断分析.结果表明,湿扰动有效位能在行星边界层(PBL)内的巨量释放是该期间“93.5”黑风暴迅速发展的主要能源.该能源的产生不仅与湿斜压大气中风的强垂直切变有关,而且也与PBL内下垫面的强烈加热增温及强对流不稳定有关,扰动湿有效位能源在PBL以上迅速减小;扰动动能源在黑风暴区基本为负,即为能汇.

【Abstract】 The contribution to the energy sources of both the moist perturbation available potential energy and the perturbation kinetic energy during the "93.5" black storm was diagnosed by using mesoscale numerical simulation data of "93.5" black storm and based on the moist perturbation energy equation of the moist baroclinic atmosphere. The result showed the release in huge amount of the moist potential energy in the planetary boundary layel(PBL) was the main energy source for a rapid and severe development of the "93.5" black storm during this period. The generation of this energy source related not only to the strong vertical shear of the wind in the moist atmosphere but also to the intense heating and warming up on the underlying surface in the PBL as well as to the strong convective instability. The perturbation available potential energy source rapidly decreased over the PBL. The perturation kinetic energy source was basically negative, namely the energy convergence in the storm area.

【基金】 国家自然科学基金
  • 【文献出处】 兰州大学学报 ,Journal of Lanzhou University , 编辑部邮箱 ,1997年04期
  • 【分类号】P458.3
  • 【被引频次】20
  • 【下载频次】34
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