| 青藏高原500hpa暖性高压生成的热成风适应机制 |
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| 引用本文： | 李国平,万军,邓思华.青藏高原500hpa暖性高压生成的热成风适应机制[J].成都信息工程学院学报,1991(Z1). |
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| 作者姓名： | 李国平 万军 邓思华 |
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| 作者单位： | 成都气象学院气象系
(李国平，万军)，成都气象学院气象系(邓思华) |
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| 摘 要： | 本文利用热成风适应原理,采取分解分析法对青藏高原500hpa暖性高压的生成机制作了一些定性和定量的讨论。结果表明:在扰动的水平尺度大于热成风适应的特征尺度的条件下,当源地有明显的负值非热成风涡度出现时,流场将向温度场适应,而温度场由于高原的加热作用存在暖中心或暖脊,则适应的结果在高原大气500hpa形成暖性高压,并伴随高层辐合,低层辐散及下沉运动。
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| 关 键 词： | 气象学 高原高压 地转适应 热成风适应 非热成风涡度 |
THE THERMAL WIND ADJUSTMENT MECHANISM OF THE 500hpa WARM HIGH IN QINGHAI-XIZANG PLATEAU |
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| Li Guopcng Wan Jun Deng Sihua.THE THERMAL WIND ADJUSTMENT MECHANISM OF THE 500hpa WARM HIGH IN QINGHAI-XIZANG PLATEAU[J].Journal of Chengdu University of Information Technology,1991(Z1). |
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| Authors: | Li Guopcng Wan Jun Deng Sihua |
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| Abstract: | According to the thermal wind adjustment theorem and resolution - analysis method, the genesis mechanism of the 500hpa warm high in Qinghai -Xizang Plateau is discussed in this paper. Two cases are analysed and calculated. The results show that: under the codition of L>L0 (L is the characteristic horizontal scale of disturbance, L0 is the characteristic scale of thermal wind adjustment), when an obvious area of negative non -thermal wind vorticity in the region of high source appears, the flow field will adjust to the temperature field. The result of thermal wind adjustment is that the warm high is generated in lower layer (i. e.500hpa) of plateau atmosphere accompanied with convergence in higher layer, divergence in lower layer and downward motion. |
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| Keywords: | Meteorology Plateau barometric high Geostrophic adjustment Thermal wind |
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