| 梅雨锋动力锋生方程组及其应用 |
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| 引用本文： | 周文吉,吴宝俊.梅雨锋动力锋生方程组及其应用[J].应用气象学报,1994,5(4):501-505. |
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| 作者姓名： | 周文吉 吴宝俊 |
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| 作者单位： | 1.北京市气象研究所，中国气象科学研究院 |
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| 摘 要： | 利用湿静力温度Tσ作为参数，导出梅雨锋锋生的方程组，并用该方程组计算了1991年江淮梅雨锋强降水的个例。结果表明:该方程组可分析梅雨锋的动力锋生；在梅雨锋中存在近似垂直分布的对称的横向次级环流，环流中干冷侧的横向穿锋环流可建立湿状态的稳定性；非地转变形项对梅雨锋锋生（消）起主导作用，同时次级环流的上升运动与锋生有正反馈关系。另外，梅雨锋中Tσ水平锋生对未来6小时降水具有一定的指示意义。
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| 关 键 词： | 梅雨锋 动力锋生 诊断分析 |
Dynamic Frontogenetical Equations of Meiyu Front and Its Application |
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| Zhou Wenji.Dynamic Frontogenetical Equations of Meiyu Front and Its Application[J].Quarterly Journal of Applied Meteorology,1994,5(4):501-505. |
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| Authors: | Zhou Wenji |
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| Affiliation: | 1.1) (Beijing Institute of Meteorological, Beijing 100081); 2) (Chinese Academy of Meteorological Sciences, Beijing 100081) |
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| Abstract: | Using Tσ as frontogenetical parameter, the frontogenetical equations which can be used in meiyu front are derived. Because horizontal temperature gradient is very weak, and the moist gradient is very strong in meiyu front, classical dynamical frontogenetical equations can not be used for diagnosis. Some cases of strong precipitation from Meiyu front over Jiang-Huai valley in 1991 are calculated. The results indicate that Meiyu front dynamical frontogenetic equations can be applied in these cases. There exist cross front secondary circulations in Meiyu front, and the circulations is nearly vertical. The cross front circulation from dry and cold regime can establish moist static stability. The frontogenetical (frontolytical) is caused mostly from ageostrophic metamorphonesis term, and it has a positive feedback relation with ascending motion of frontogenesis. The horizontal frontogenesis of Tσ in Meiyu front has well indicating action for future six hours precipitation. |
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| Keywords: | Meiyu front Dynamic frontogenesis Diagnostic analysis |
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