| 地面感热对青藏高原低涡流场结构及发展的作用 |
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| 引用本文： | 李国平,赵邦杰,杨锦青.地面感热对青藏高原低涡流场结构及发展的作用[J].大气科学,2002,26(4):519-525. |
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| 作者姓名： | 李国平 赵邦杰 杨锦青 |
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| 作者单位： | 1.成都信息工程学院,成都,610041 |
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| 基金项目： | 四川省跨世纪杰出青年学科带头人培养基金、四川省科技厅应用基础研究项目"四川低涡型暴雨非线性预报方法的研究"共同资助 |
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| 摘 要： | 考虑热带气旋类青藏高原低涡为受加热和摩擦强迫并满足热成风平衡的轴对称涡旋系统,通过求解线性化的柱坐标系中涡旋模式的初值问题,分析了地面感热对高原低涡流场结构及发展的影响,给出了高原低涡眼壁内、外侧水平流场和垂直流场的结构特征,讨论了低涡发展与其水平尺度、垂直厚度、所处纬度以及热量总体输送系数和加热强度的关系.结果表明:地面感热对低涡的生成及发展具有重要作用,但这种作用是否有利于低涡的发展与低涡中心和感热加热中心的配置有关.
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| 关 键 词： | 青藏高原 低涡 地面感热 流场结构 |
A Dynamical Study of the Role of Surface Sensible Heating in the Structure and Intensification of the Tibetan Plateau Vortices |
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| Li Guoping,Zhao Bangjie and Yang Jinqing.A Dynamical Study of the Role of Surface Sensible Heating in the Structure and Intensification of the Tibetan Plateau Vortices[J].Chinese Journal of Atmospheric Sciences,2002,26(4):519-525. |
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| Authors: | Li Guoping Zhao Bangjie and Yang Jinqing |
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| Abstract: | The vortices such as TCLV (Tropical Cyclone-Like Vortices) over the Tibetan Plateau are assumed to be axisymmetrical and thermal-wind balanced systems forced by diabatic heating and friction, and solved as an initial-value problem of linearized vortex equation set in cylindrical coordinates. The role of surface sensible heating in the structure and intensification of the Tibetan Plateau vortices is analyzed, the horizontal and vertical flow field of the vortex is drawn, and the relationship between growth of vortex and various parameters including horizontal and vertical scale of vortex, latitude of vortex source region, heat transfer coefficient and intensity of heating is discussed. The results show that the surface sensible heating plays an important role in the genesis and intensification of vortices; whether the role of surface sensible heating is beneficial to the development of vortex or not depends on the allocation of its flow field and heating field. |
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| Keywords: | Tibetan Plateau vortex surface sensible heating structure of flow field |
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