| 甘肃永登强对流云的雷达气候学特征分析 |
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| 引用本文： | 渠永兴,张强,康凤琴.甘肃永登强对流云的雷达气候学特征分析[J].高原气象,2004,23(6):773-780. |
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| 作者姓名： | 渠永兴 张强 康凤琴 |
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| 作者单位： | 中国气象局,兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,甘肃,兰州,730020 |
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| 基金项目： | 科技部社会公益研究专项"西北地区人工防雹消雹技术"项目(2002DIB10046)资助 |
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| 摘 要： | 利用甘肃永登19年(1971—1985年，1999—2003年)的雷达回波资料，分析了强对流云回波形成及分布特征与甘肃永登地区特殊地形的关系；强对流天气大尺度天气背景和相应的强对流雷达回波的移动、高度、强度和回波谱等特征。结果表明，该区的特殊地形造成气流阻挡并使其折转汇合、垂直运动剧烈加速，使得对流云迅速发展，这是该区对流云形成和分布的决定因素；高空天气形势和对流云结构制约了对流云雷达回波的移动和基本特征。雹云回波谱表明，雹暴对流活动一般均处于旺盛状态，强回波高度和其所处的云内温度是形成雹云的重要条件。
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| 关 键 词： | 强对流云 雷达回波 特殊地形 雹暴 对流活动 垂直运动 天气形势 高空 移动 波形 |
| 文章编号： | 1000-0534(2004)06-0773-08 |
Radar Climatic Characteristics of Severe Convective Cloud in Yongdeng,Gansu |
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| QU Yong-xing,ZHANG Qiang,KANG Feng-qin,Lanzhou Institute of Arid Meteorology,China Meteorological Administration,Lanzhou ,China.Radar Climatic Characteristics of Severe Convective Cloud in Yongdeng,Gansu[J].Plateau Meteorology,2004,23(6):773-780. |
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| Authors: | QU Yong-xing ZHANG Qiang KANG Feng-qin Lanzhou Institute of Arid Meteorology China Meteorological Administration Lanzhou China |
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| Institution: | QU Yong-xing,ZHANG Qiang,KANG Feng-qin,Lanzhou Institute of Arid Meteorology,China Meteorological Administration,Lanzhou 730020,China) |
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| Abstract: | Using the 19-year radar echo data in disaster area of Yongdeng, Gansu, the relation between the forming of severe convective echo and distributing characteristics with special topography characteristics of Yongdeng, Gansu, the large-scale weather background and its corresponding to severe convective echo moving, height, intensity and echo spectrum are analyzed. The results show that 1the special topography cause the air flow blocking and make it to turn back and converge, then vertical motion violently quicken, and making the convective cloud developed very quickly, which is the critical factor of the forming and distribution of convective cloud. 2the weather pattern at high level and the convective cloud construction restrict radar echo moving and echo basic characteristic. 3the echo spectrum of hail cloud show that convective activity of hail storm is exuberant state in general, the severe echo height and its temperature are important conditions for the formation of hail cloud. 4the change of hail storm echo intensity depends on the case intensity of hail storm. |
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| Keywords: | Severe convective radar echo Radar climatology Yongdeng of Gansu |
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