| 大范围暴雨过程涡旋场特征的滤波试验 |
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| 引用本文： | 徐祥德,朱远琼.大范围暴雨过程涡旋场特征的滤波试验[J].气象学报,1985,43(1):72-78. |
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| 作者姓名： | 徐祥德 朱远琼 |
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| 作者单位： | 南京气象学院，南京气象学院 四川省气象局研究所 |
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| 摘 要： | 本文着眼于大范围暴雨过程天气尺度系统的诊断研究。采用平滑滤波的方法分解行星尺度及天气尺度谱,计算了暴雨过程不同尺度谱的涡旋场、散度场分布及演变趋势,对天气尺度系统的分布特征、低空急流发展的动力因素进行了分析,且运用描述不同尺度谱的变形涡度方程,对天气尺度系统的移动、发展进行了诊断研究。本文的数值分析表明滤波方法有助于进一步揭示大气运动的多尺度特征,深入认识暴雨过程的动力机制。
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| 收稿时间： | 1983/10/4 0:00:00 |
| 修稿时间： | 1984/1/24 0:00:00 |
A FILTERING STUDY OF VORTICITY FIELD CHARACTERS IN THE LARGE AREA HEAVY RAIN PROCESSES IN EASTERN CHINA |
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| Xu Xiangde and Zhu Yuanqiong.A FILTERING STUDY OF VORTICITY FIELD CHARACTERS IN THE LARGE AREA HEAVY RAIN PROCESSES IN EASTERN CHINA[J].Acta Meteorologica Sinica,1985,43(1):72-78. |
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| Authors: | Xu Xiangde and Zhu Yuanqiong |
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| Institution: | Nanjing Institute of Meteorology;Nanjing Institute of Meteorology |
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| Abstract: | In this paper, investigation has been made into the large area heavy rain processes in eastern China. The large scale and synoptic scale vorticity field and divergence field have been calculated by the smooth filtering operator. Using deformed vorticity equation governing motions of a diverse spectrum of scale, diagnostic analysis on the characters of movement and evolution of synoptic system has been made. The results show that the filter experiment may reveal the multiple scale characters and the dynamic factors of large area heavy rain processes. |
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