| HELICITY ANALYSIS FOR HIGH-WIND AND UNCOMMONRAINSTORM PROCESSES OVER YUNNANIN EARLY SUMMER |
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| 作者姓名： | 许美玲 段旭 孙绩华 |
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| 作者单位： | Yunnan Meteorological Observatory，Kunming 650043 China，Yunnan Meteorological Observatory，Kunming 650043 China，Yunnan Meteorological Observatory，Kunming 650043 China |
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| 基金项目： | Applied Foundation Project of Yunnan (2000D0091M)，Key Scientific Research Program for the 10th-five-year economic development plan (2001NG43) |
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| 摘 要： |
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| 关 键 词： | 暴雨过程分析 螺旋型 大气运动 物理模型 |
HELICITY ANALYSIS FOR HIGH-WIND AND UNCOMMONRAINSTORM PROCESSES OVER YUNNANIN EARLY SUMMER |
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| XU Mei-ling,DUAN Xu and SUN Ji-hua.HELICITY ANALYSIS FOR HIGH-WIND AND UNCOMMONRAINSTORM PROCESSES OVER YUNNANIN EARLY SUMMER[J].Journal of Tropical Meteorology,2003,9(2):208-214. |
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| Authors: | XU Mei-ling DUAN Xu and SUN Ji-hua |
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| Institution: | Yunnan Meteorological Observatory, Kunming 650043 China |
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| Abstract: | Helicity was applied to analyze several high-wind and rainstorm processes, which occurred from May to June, 2001 over Yunnan in early summer. The results of diagnostic analyses show that the rainstorm occurs in the area in which hp is positive at 700 hPa and energy is unstable. The change of helicity can reflect the movement and development of synoptic system and the position and intensity of the rainstorm. The value of hp is a negative center at the upper level and a positive at the lower level over the rainstorm position; moreover it can reflect the characteristics of vertical distribution and rotational motion. |
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| Keywords: | rainstorm helicity diagnostic analyses |
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