| 乌鲁木齐市短时强降水分布特征及环境条件分析 |
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| 引用本文： | 张超,贾健.乌鲁木齐市短时强降水分布特征及环境条件分析 [J].新疆气象,2019,13(3):41-47. |
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| 作者姓名： | 张超 贾健 |
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| 作者单位： | 新疆气象台;乌鲁木齐市气象局 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金项目（IDM2016001）,国家重点研发计划重点专项 “中亚极端降水系统精细化结构 ”2018YFC1507103共同资助 |
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| 摘 要： | 利用常规地面、高空探测资料、加密自动站逐时雨量资料,分析2012—2016年乌鲁木齐市暖季的短时强降水分布特征及环境条件,得出乌鲁木齐市短时强降水的空间分布、月变化及小时雨强特征;通过分析22场短时强降水天气过程,按照500 hPa影响系统分类,得出了西西伯利亚低槽、中亚低涡和西北气流3类环流形势及概念模型;统计得出临近短时强降水时段,K、SI、LI等不稳定指数的月变化差异较大,6—7月各指数集中度高,指示意义最好;5月、9月短时强降水的水汽特征量值明显小于6—8月,7月水汽量值最高。
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| 关 键 词： | 乌鲁木齐市 短时强降水 概念模型 关键环境参数 |
| 收稿时间： | 2019/2/16 0:00:00 |
| 修稿时间： | 2019/4/2 0:00:00 |
Analysis on distribution characteristics and environmental conditions of short-term heavy precipitation in Urumqi |
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| ZHANG Chao and JIA Jian.Analysis on distribution characteristics and environmental conditions of short-term heavy precipitation in Urumqi[J].Bimonthly of Xinjiang Meteorology,2019,13(3):41-47. |
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| Authors: | ZHANG Chao and JIA Jian |
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| Institution: | Xinjiang Meteorological Observatory,Urumqi Meteorological Bureau |
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| Abstract: | Based on the conventional ground data, high-altitude detection data and hourly encrypted automatic station rainfall data. We analyzed the distribution characteristics and environmental conditions of short-term heavy precipitation in the warm season of Urumqi from 2012 to 2016, and the spatial distribution, monthly variation and hourly rainfall intensity characteristics of short-term heavy precipitation in Urumqi were obtained. In addition, by analyzing 22 short-term severe precipitation weather processes, and according to the classification of 500 hPa impact system, the three types of circulation patterns and conceptual models of West Siberian low trough, Central Asian low vortex and the Northwest airflow were established. Further, the statistical results demonstrated that the monthly variations of key environmental parameters such as K, SI, LI instability indices and more are relatively large now-casting during the short-term heavy precipitation period. From June to July, the concentration of each index is high, indicating the best. Meanwhile, the water vapor characteristics of short-term heavy precipitation in May and September are obviously less than June to August, and the highest moisture value in July. |
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| Keywords: | Urumqi Short-term heavy precipitation Conceptual model Key environmental parameters |
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