| 青藏高原大地形作用下的Rossby波 |
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| 引用本文： | 刘式适,柏晶瑜,陈华.青藏高原大地形作用下的Rossby波[J].高原气象,2000,19(3):331-338. |
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| 作者姓名： | 刘式适 柏晶瑜 陈华 |
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| 作者单位： | 1. 北京大学地球物理系,北京,100871
2. 中国气象科学研究院,北京,100081 |
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| 基金项目： | “国家重点基础研究发展规划”首批启动的“我国重大气候灾害的机理和预测理论研究”项目，国家攀登B项目“青藏高原地 气系统物理过程观 |
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| 摘 要： | 在对青藏高原大地形的动力和热力作用物理分析的基础上，着重分析了青藏高原地形坡度和非绝热和非绝热加热对二维Ｒｏｓｓｂｙ波的影响。研究指出：高原地开坡度对Ｒｏｓｓｂｙ波的作用与Ｒｏｓｓｂｙ参数的作用相当，而且其相速度和群速度之间存在一个圆的关系：（ｃｇｘ－ｃｘ）＾２＋ｃｇｙ＾２＝Ｒ＾２；高原加热作用与水平辐合作用相当。地形坡度和非绝热加热都有使二维Ｒｏｓｓｂｙ波向低频发展的的趋向。
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| 关 键 词： | 青藏高原 大地形 Rossby波 大气振荡 |
ROSSBY WAVE AFFECTED BY LARGE-SCALE TOPOGRAPHY OF QINGHAI-XIZANG PLATEAU |
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| LIU Shi-kuo,BAI Jing-yu,CHEN Hua.ROSSBY WAVE AFFECTED BY LARGE-SCALE TOPOGRAPHY OF QINGHAI-XIZANG PLATEAU[J].Plateau Meteorology,2000,19(3):331-338. |
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| Authors: | LIU Shi-kuo BAI Jing-yu CHEN Hua |
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| Institution: | LIU Shi kuo 1 BAI Jing yu 2 CHEN Hua 1 |
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| Abstract: | On the basis of analysis on dynamic and thermal effects of large scale topography of Qinghai Xizang Plateau we will focus to analyze the effect of slope and diabatic heating of Qinghai Xizang Plateau on the 2 D Rossby wave. It is shown that the effect of topography slope of Qinghai Xizang Plateau on Rossby wave is equivalent to the effect of Rossby parameter; it is a circle between phase velocity and group velocity (c gx -c x) 2 c 2 gy =R 2; and the heating effect is just equivalent to the effect of horizontal convergence. The slope and biabatic heating will make 2 D Rossby wave turning into low frequency wave. |
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| Keywords: | Qinghai Xizang plateau Large scale topography Rossby wave |
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