| 闽西北冰雹的时空特征与天气形势分析 |
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| 引用本文： | 王宏,林长城,郑丽萍,陈彬彬,余永江.闽西北冰雹的时空特征与天气形势分析[J].气象科技,2011,39(6):785-790. |
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| 作者姓名： | 王宏 林长城 郑丽萍 陈彬彬 余永江 |
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| 作者单位： | 1. 福建省气象科学研究所
2. 福建省气象局,福州,350001 |
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| 基金项目： | 福建省科技厅重点项目（2009Y0006）和福建省气象局课题（200806）资助 |
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| 摘 要： | 利用1990—2008年常规观测资料和850 hPa、500 hPa高空资料，分析了闽西北冰雹的时空分布特征和有利于产生冰雹的天气型。结果表明，闽西北是福建省冰雹多发区，近年来降雹呈明显减少趋势；月变化呈现一大明显单峰（4月）和两小双峰（7月、11月）现象，主要发生时次在14：00—20：00；连续降雹日数以孤立日为主，每次降雹以1～2站次较为多见；11至翌年5月，有利于产生冰雹的天气型（850 hPa）为暖切适中型、低涡冷切适中型，冷切适中型和低槽偏东型；冷切偏西和暖切偏北型降雹发生概率较适中型低，较偏南型高；74.1%的雹日伴有低空西南急流，并以急流适中和偏北型居多；大于等于3站次降雹的主导天气形势为暖切适中型、低涡冷切适中型，81.5%伴有低空西南急流；6—9月有利于产生冰雹的天气型（500 hPa）为副热带高压边缘型和副热带小高压型，发生较大范围冰雹的可能性小。
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| 关 键 词： | 冰雹 天气形势 时空特征 |
| 收稿时间： | 2010/6/21 0:00:00 |
| 修稿时间： | 2010/10/31 0:00:00 |
Spatial-Temporal Characteristics and Circulation Patterns of Hailing Days in Northwest Fujian |
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| Wang Hong,Lin Changcheng,Zheng Liping,Chen Binbin and Yu Yongjiang.Spatial-Temporal Characteristics and Circulation Patterns of Hailing Days in Northwest Fujian[J].Meteorological Science and Technology,2011,39(6):785-790. |
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| Authors: | Wang Hong Lin Changcheng Zheng Liping Chen Binbin and Yu Yongjiang |
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| Institution: | 1 Fujian Institute of Meteorological Science, 2 Fujian Meteorological Service, Fuzhou 350001) |
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| Abstract: | Based on the conventional observation and radiosonde data at 850 hPa and 500 hPa from 1990 to 2008, the spatial and temporal features of hailing days and atmospheric circulation patterns over Fujian are analyzed. The results show that hail disasters occurred frequently in Northwest Fujian, and there were a decreasing trend in recent years. The monthly change of hail events presents a typical multiple peak pattern with the big peak in April and two small peaks in July and November. Hails occurred mainly from 14：00 to 20：00. The hail events usually occurred solitarily, and the affected stations were less than three. From November to next May, the main circulation patterns at 850 hPa favorable for hail generation include “moderate warm shear,” “moderate vortex and cold shear,” “moderate cold shear,” and “eastward deflection trough.” The hail falling probabilities in the pattern of “west slanting cold shear” and “northward slanting warm shear” were smaller than those in “moderate vortex and shear,” and greater than that in “south slanting shear.” The 74.1% of hail days were associated with a strong low level southwest jet, mostly “moderate jet” or “north slanting jet.” The main weather patterns affected three or more were “moderate warm shear,” “moderate vortex and cold shear.” The 81.5% of hail events were associated with the strong low level southwest jet. From June to September, the circulation patterns at 500hPa favorable for hails were “peripheral type subtropical high” and “small subtropical high,”and the probability of large scale hail weather was small. |
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| Keywords: | hail circulation pattern spatial temporal characteristic |
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