| THE DEVELOPMENT OF SYMMETRIC DISTURBANCE SUPERPOSED ON BAROCLINIC FRONTAL ZONE UNDER THE ACTION OF DEFORMATION FIELD |
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| 作者姓名： | 王兴宝 伍荣生 |
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| 作者单位： | The Key Laboratory of Mesoscale Severe Weather (MOE) Nanjing University，The Key Laboratory of Mesoscale Severe Weather (MOE)，Nanjing University，Nanjing 210093，Nanjing 210093 |
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| 基金项目： | It is supported by the National Natural Science Foundation of China. |
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| 摘 要： | The development of symmetric disturbance superposed on the background field of Hoskins-Bretherton (1972) frontogenesis model is investigated by means of WKBJ approach,It is found thatthe forcing of large-scale deformation,the frontal circulation and the spatial-temporal variations ofstability parameters (F~2,N~2,M~2) can bring about the development of symmetric disturbance,even though the frontal baroclinic flow is symmetric stable (F~2N~2-M~2=q>0),Thefrontogenetical process of deformation confluence zone and the ascending branch of frontalcirculation are in favor of the development of symmetric disturbance,The actions of ageostrophicshear in frontal zone and the variation of stability parameters are dependent on the structure ofdisturbance.
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THE DEVELOPMENT OF SYMMETRIC DISTURBANCE SUPERPOSED ON BAROCLINIC FRONTAL ZONE UNDER THE ACTION OF DEFORMATION FIELD |
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| WANG Xingbao WU Rongsheng The Key Laboratory of Mesoscale Severe Weather.THE DEVELOPMENT OF SYMMETRIC DISTURBANCE SUPERPOSED ON BAROCLINIC FRONTAL ZONE UNDER THE ACTION OF DEFORMATION FIELD[J].Acta Meteorologica Sinica,2001(4). |
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| Authors: | WANG Xingbao WU Rongsheng The Key Laboratory of Mesoscale Severe Weather |
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| Abstract: | The development of symmetric disturbance superposed on the background field of Hoskins- Bretherton (1972) frontogenesis model is investigated by means of WKBJ approach,It is found that the forcing of large-scale deformation,the frontal circulation and the spatial-temporal variations of stability parameters (F~2,N~2,M~2) can bring about the development of symmetric disturbance, even though the frontal baroclinic flow is symmetric stable (F~2N~2-M~2=q>0),The frontogenetical process of deformation confluence zone and the ascending branch of frontal circulation are in favor of the development of symmetric disturbance,The actions of ageostrophic shear in frontal zone and the variation of stability parameters are dependent on the structure of disturbance. |
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| Keywords: | frontogenesis development of symmetric disturbance WKBJ method |
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