| 正压模式中大地形作用下的低频波 |
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| 引用本文： | 付遵涛 王树涛. 正压模式中大地形作用下的低频波[J]. 高原气象, 1998, 17(3): 223-230 |
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| 作者姓名： | 付遵涛 王树涛 |
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| 作者单位： | 北京大学地球物理系，哈尔滨市渔业机械化施工公司 |
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| 基金项目： | 国家攀登B项目,攀登项目 |
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| 摘 要： | 利用包含大地形和常数纬向基本气流的正压模式方程组，研究了大地形对低频波激发的作用，结果表明：起作用的地形因子主要是地形的最大高度和地形坡度，地形最大高度的作用主要是使Ｒｏｓｓｂｙ波趋向低频，而地形坡度的作用主要是对Ｒｏｓｓｂｙ波的稳定性决定作用。同时，适当地形坡度也可导致低频波的形成。
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| 关 键 词： | 大地形 低频波 地形坡度 正压模式 气压 气流 |
LOW-FREQUENCY WAVES FORCED BY LARGE-SCALE TOPOGRAPHY IN THE BAROTROPIC MODEL |
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| FU Zun-tao LIU Shi-kuo WANG Shu-tao. LOW-FREQUENCY WAVES FORCED BY LARGE-SCALE TOPOGRAPHY IN THE BAROTROPIC MODEL[J]. Plateau Meteorology, 1998, 17(3): 223-230 |
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| Authors: | FU Zun-tao LIU Shi-kuo WANG Shu-tao |
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| Affiliation: | FU Zun-tao 1 LIU Shi-kuo 1 WANG Shu-tao 2 |
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| Abstract: | A barotropic model, including large-scale topography and zonal mean flow, was established to discuss the effects of large-scale topography on the low-frenquency waves. The results show that two main factors which affects low-frequency waves is maximal height of topography and topographic slope. The former makes frequency of topographic Rossby waves decrease, the latter makes Rossby waves instable. Moreover, when topographic slope is optimum, it can also make Rossby waves turn into low-frequency waves. |
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| Keywords: | Large-scale topography Low-frequency waves Maximal height of topography Topographic slope |
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