| 中尺度地形背风波的作用及其应用 |
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| 引用本文： | 朱民,余志豪,陆汉城.中尺度地形背风波的作用及其应用[J].气象学报,1999,57(6):705-714. |
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| 作者姓名： | 朱民 余志豪 陆汉城 |
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| 作者单位： | 南京大学大气科学系! 南京 ２１００９３(朱民，余志豪)，南京大学大气科学系!南京 ２１００９３(陆汉城) |
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| 摘 要： | 文中探讨了中尺度地形背风驻波及对天气系统发生发展的影响问题，通过建立一个含类似大别山地形作用的简化数学模型并进行了数值计算，结果表明，当过山气流u取１０１ｍ／ｓ量级，层结参数Ｎ取１０(－３)ｓ(－１)量级，其比值Ｕ／Ｎ约为３×１０３～４×１０３时可出现一种相当正压的地形背风波，其波长近于Ｕ／ｆ～１０２ｋｍ（ｆ为柯氏参数）。结合上述理论结果和实际暴雨个例，分析指出在江淮梅雨期间，当有移动性的暴雨区移至大别山定常背风波的适当位置时，暴雨会得到增幅。
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| 关 键 词： | 中尺度地形背风波 相当正压 雨团 增幅 |
| 收稿时间： | 1998/5/15 0:00:00 |
| 修稿时间： | 1998/11/12 0:00:00 |
THE EFFECT OF MESO-SCALE LEE WAVE AND ITS APPLICATION |
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| Zhu Min,Yu Zhihao and Lu Hancheng.THE EFFECT OF MESO-SCALE LEE WAVE AND ITS APPLICATION[J].Acta Meteorologica Sinica,1999,57(6):705-714. |
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| Authors: | Zhu Min Yu Zhihao and Lu Hancheng |
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| Institution: | Inpartment of Atmospheric Sciences, Naming University, Nanjing 210093;Inpartment of Atmospheric Sciences, Naming University, Nanjing 210093;Inpartment of Atmospheric Sciences, Naming University, Nanjing 210093 |
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| Abstract: | In this paper. the influence of meso-scale stationary lee wave on the genesis and development of synoptic system is discussed. A simplified mathematical model including the roleof Dabieshan is established for numerical calculation, the result indicates: when basic flow Uequals to 101 m/s, stratification parameter N equals to 10-'3s-1 and the ratio of U to N approximates 3 X 103~4 X 103, a kind of equivalent - barotropic lee wave could appear. its wavelength approximates U/f (f is Coriolis parameter- 10--4s-1 ). Then a practical case of heavyrain is analysed by using above conclusion to point out during Jianghuai meiyu pened. whenmigarating rainstorm moves to certain position of Dabieshan's stationary lee wave, the precipitation could intensify. |
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| Keywords: | Meso-scale lee wave Equivalent barotropy Rainstorm Intensification |
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