| NEW METHOD FOR LOW ORDER SPECTRAL MODEL AND ITS APPLICATION |
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| 作者姓名： | 曹杰 尤亚磊 |
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| 作者单位： | Department of Atmospheric Science Yunnan University Kunming 650091，P. R. China，Department of Atmospheric Science Yunnan University，Kunming 650091，P. R. China |
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| 摘 要： | In order to overcome the deficiency in classical method of low order spectral model, a new method for low order spectral model was advanced. Through calculating the multiple correlation coefficients between combinations of different functions and the recorded data under the least square criterion, the truncated functions which can mostly reflect the studied physical phenomenon were objectively distilled from these data. The new method overcomes the deficiency of artificially selecting the truncated functions in the classical low order spectral model. The new method being applied to study the inter-annual variation of summer atmospheric circulation over Northern Hemisphere, the truncated functions were obtained with the atmospheric circulation data of June 1994 and June 1998. The mechanisms for the two-summer atmospheric circulation variations over Northern Hemisphere were obtained with two-layer quasi-geostrophic baroclinic equation.
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| 关 键 词： | 底位光谱模型 最小平方准则 去顶端函数 大气循环 |
| 收稿时间： | 2005-05-10 |
| 修稿时间： | 2005-10-07 |
New method for low order spectral model and its application |
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| Professor Jie Cao Doctor,Ya-lei You.NEW METHOD FOR LOW ORDER SPECTRAL MODEL AND ITS APPLICATION[J].Applied Mathematics and Mechanics(English Edition),2006,27(4):477-484. |
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| Authors: | Professor Jie Cao Doctor Ya-lei You |
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| Institution: | Department of Atmospheric Science, Yunnan University, Kunming 650091, P. R. China |
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| Abstract: | In order to overcome the deficiency in classical method of low order spectral model, a new method for low order spectral model was advanced. Through calculating the multiple correlation coefficients between combinations of different functions and the recorded data under the least square criterion, the truncated functions which can mostly reflect the studied physical phenomenon were objectively distilled from these data. The new method overcomes the deficiency of artificially selecting the truncated functions in the classical low order spectral model. The new method being applied to study the inter-annual variation of summer atmospheric circulation over Northern Hemisphere, the truncated functions were obtained with the atmospheric circulation data of June 1994 and June 1998. The mechanisms for the two-summer atmospheric circulation variations over Northern Hemisphere were obtained with two-layer quasi-geostrophic baroclinic equation. |
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| Keywords: | low order spectral model least square criterion truncated function atmospheric circulation in summer physical mechanism |
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