| 地形强迫正压大气异常持续类型的确定及其对可预报性的影响 |
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| 引用本文： | 王国民,王召民.地形强迫正压大气异常持续类型的确定及其对可预报性的影响[J].大气科学,1996,20(2):207-215. |
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| 作者姓名： | 王国民 王召民 |
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| 作者单位： | 南京大学大气科学系,南京 210093 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 使用地形强迫正压涡度方程模式的输出资料，讨论了流函数异常EOF展开时间系数的特征时间尺度。由此研究了异常持续类型的确定及其对可预报性的影响问题。结果表明:异常持续类型与环流的演变有十分密切的关系，初始状态环流的结构对可预报性有明显的影响。最后探讨了对中期和延伸期数值预报的可能应用。
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| 关 键 词： | 持续异常 可预报性 正压大气 |
Identification of Persistent Modes of Anomalies and Their Impact on Predictability in the Barotropic Atmosphere with Orographic Forcing |
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| Wang Guomin and Wang Zhaomin.Identification of Persistent Modes of Anomalies and Their Impact on Predictability in the Barotropic Atmosphere with Orographic Forcing[J].Chinese Journal of Atmospheric Sciences,1996,20(2):207-215. |
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| Authors: | Wang Guomin and Wang Zhaomin |
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| Abstract: | A data set generated by integrating a nonlinear barotropic vorticity equation model with an orographic forcing is used to study the characteristic time scale of EOF temporal coefficients in streamfunction anomalies.Then a most persistent mode(MPM) is determined and its influence on predictability is investigated. It is found that there is a close correlation between the MPM.and the evolution of circulation anomalies, and the structure of initial fields has obvious impact on predictability.Finally the potential application of atmospheric MPM to the extended-and medium-range weather forecasts is discussed. |
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| Keywords: | persistent anomalies predictability barotropic atmosphere |
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