| 云南冰雹的时空分布特征及其气候成因初探 |
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| 引用本文： | 陶云,段旭,杨明珠.云南冰雹的时空分布特征及其气候成因初探[J].南京气象学院学报,2002,25(6):837-842. |
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| 作者姓名： | 陶云 段旭 杨明珠 |
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| 作者单位： | 云南省气象台,云南,昆明,650034 |
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| 基金项目： | 云南省自然基金课题 (2 0 0 0 D0 0 91 M)，云南省“十五”攻关项目“滇中中尺度灾害性天气监测预警系统科学实验及应用研究” |
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| 摘 要： | 利用云南省120个测站961-1997年的逐月冰雹累计日数资料，分析了云南冰雹日数的时空分布特征，着重讨论了冰雹日数的地理分布、年际及月际变化情况，同时初步分析了云南冰雹天气形成的气候背景。研究结果表明：云南冰雹主要发生于2月、3月和4月，是典型的春雹发生区，春季冰雹日数占全年冰雹日数的64％；同时运动春雹有明显年际变化，最严重的年份是1990年；最少的年份是1984年；从区域来看，滇西南是主要的冰雹发生区，占全省冰雹日数的30.4％，其次是滇中占23.8％。另外，多春雹年和少春雹年北半球极涡中心强度、青藏高原高度场、印缅槽及OLR场等存在显著的差异。
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| 关 键 词： | 云南 冰雹 时空分布 气候成因 极涡 春季 |
| 文章编号： | 1000-2022(2002)06-0837-06 |
| 修稿时间： | 2002年4月15日 |
Study on Spatial/Temporal Distribution and Climate Causes of Hail Formation in Yunnan |
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| TAO Yun,DUAN Xu,YANG Ming zhu.Study on Spatial/Temporal Distribution and Climate Causes of Hail Formation in Yunnan[J].Journal of Nanjing Institute of Meteorology,2002,25(6):837-842. |
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| Authors: | TAO Yun DUAN Xu YANG Ming zhu |
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| Abstract: | The characteristics of spatial and temporal distribution and climate causes of hial formation in Yunnan were studied based on the data of the number of monthly hail day(1961-1997) at 120 stations of Yunnan Province.Hail usually occurs in February, March or April in Yunnan because it belongs to typical spring hail region. The number of hail days in spring accounts for 64 percent of the total number in the whole year.There is significant interannual change of hail in spring.The severest hail year is 1990,and the lightest hail year is 1984.In view of the region the southwest Yunnan is a major region for hail occurance with the number of hail days made up 30.4 percent of the whole province,while,the middle Yunnan is the second.In addition,there exits significant differences of polar vortex intense,height field on the Qing zang Plateau,trough in India Myanmar,and OLR in Northern Hemisphere between above normal hail year and below normal hail year in spring. |
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| Keywords: | hail in Yunnan spatial/temporal distribution climate causes |
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