| 夏季风场40—50天振荡的全球分布及波动特征 |
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| 引用本文： | 徐建军,何金海.夏季风场40—50天振荡的全球分布及波动特征[J].南京气象学院学报,1992,15(3):358-367. |
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| 作者姓名： | 徐建军 何金海 |
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| 作者单位： | 南京气象学院
(徐建军)，南京气象学院(何金海) |
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| 摘 要： |
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| 关 键 词： | 夏季 风场 振荡 全球分布 波动 |
THE GLOBAL DISTRIBUTION OF 40-50 DAY OSCILLATION OF THE WIND FIELD IN SUMMER AND ITS FLUCTUATION FEATURES |
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| Xu Jianjun,He Jinhai Nanjing Institute of Meteorology.THE GLOBAL DISTRIBUTION OF 40-50 DAY OSCILLATION OF THE WIND FIELD IN SUMMER AND ITS FLUCTUATION FEATURES[J].Journal of Nanjing Institute of Meteorology,1992,15(3):358-367. |
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| Authors: | Xu Jianjun He Jinhai Nanjing Institute of Meteorology |
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| Institution: | Xu Jianjun;He Jinhai Nanjing Institute of Meteorology |
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| Abstract: | By using the June-September bandpass filtered grid data of 1984 from theECMWF,the global distribution of 40-50 day oscillation of the 200 hPa wind field insummer and its fluctuation features are examined. Analysis indicates that the 40-50 dayoscillation of the wind field has significant meridional-zonal phase propagation. It isfound that the oscillation has a larger zonal scale and a greater phase propagation veloci-ty in the tropics than in the extratropics; the zonal wind oscillation has a larger zonalscale but a smaller meridional scale than the meridional wind oscillation with their zonalpropagation quicker than their meridional propagation; the zonal wind oscillation has ameridionally-arranged wavetrain structure while the meridional wind oscillation has azonally-arranged wavetrain structure. |
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| Keywords: | the wind field oscillation global distribution phase propagation energy transport |
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