| 新疆阿克苏地区冰雹时空分布及雷达回波特征 |
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| 引用本文： | 朱思华,罗继,曲良璐.新疆阿克苏地区冰雹时空分布及雷达回波特征[J].新疆气象,2021,15(2):81-88. |
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| 作者姓名： | 朱思华 罗继 曲良璐 |
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| 作者单位： | 新疆维吾尔自治区人工影响天气办公室,新疆阿克苏地区气象局,新疆阿克苏地区气象局 |
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| 基金项目： | 中亚大气科学研究基金项目 CASS201723,中央级公益性科研院所基本科研业务专项基金资助项目IDM201601 |
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| 摘 要： | 利用"新疆气象灾情直报系统"冰雹灾情数据和阿克苏地区人工防雹作业信息,分析了阿克苏地区9县市2010—2019年冰雹天气的时间变化和空间分布特征,选用阿克苏地区9县市2009—2019年10场冰雹天气过程,应用美国Gibson Ridge Software LLC公司GR2Analyst雷达产品处理软件分析二次产品,得出以下结论:阿克苏地区近10 a平均每年出现冰雹14.5次,冰雹次数呈增多趋势,主要表现为春秋两季增多,5—7月冰雹天气高发,15—20时是冰雹易发时段,18—20时为高发时段,沙雅县和温宿县是阿克苏地区冰雹频发区。统计10个冰雹个例对流单体,1.5°仰角平均最大回波强度为50.7 dBZ、平均回波顶高为9.4 km、平均最大垂直液态水含量为12.8 kg·m-2。超级单体风暴的雷达回波PPI上有"V"形缺口,垂直结构RHI有弱回波区或有界弱回波区。有界弱回波区或弱回波区面积越大、弱回波区上部回波越强、弱回波区高度越高,则冰雹越强,多单体风暴和单体风暴雷达回波的主要产品值明显小于超级单体。近10 a阿克苏地区人工防雹作业需关注春秋两季冰雹增多趋势,人工防雹作业高峰时段应集中在16—19时,比冰雹高发时段提前1~2 h。
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| 关 键 词： | 冰雹 时空分布 雷达回波 超级单体 阿克苏地区 |
| 收稿时间： | 2020/2/28 0:00:00 |
| 修稿时间： | 2020/8/22 0:00:00 |
Weather Classification and Circulation Configuration of easterly wind-blown snow in the Mayitas Wind Area |
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| luoji and.Weather Classification and Circulation Configuration of easterly wind-blown snow in the Mayitas Wind Area[J].Bimonthly of Xinjiang Meteorology,2021,15(2):81-88. |
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| Authors: | luoji and |
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| Institution: | (Weather Modification Office of Xinjiang Uygur Autonomous Region,Urumqi 830002,China;Xinjiang Aksu Regional Meteorological Observatory,Aksu 843000,China) |
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| Abstract: | Using the hail data of "Xinjiang Meteorological Disaster Direct Reporting System" and the information of hail suppression in Aksu, this paper statistics the time changes and spatial distribution characteristics of the hail weather in 9 counties and cities in Aksu 2010-2019, Selection of 9 counties in Aksu 10 hail weather processes 2009-2019. Applying the analysis of GR2 Analyst radar product processing software by Gibson Ridge Software LLC, USA, the following conclusions are drawn: in this decade, Aksu hail occurred nearly 14.5 times a year, the number of hail is increasing trend, mainly in the spring and autumn increase, 5-July hail weather high, 15-20 pm is the hail prone period, 18-20 for the high-risk period, Shaya and Wensu is Aksu area hail frequency area. Statistics of 10 hail case convective monomers, 1.5 degrees elevation average maximum echo strength of 50.7dBZ, average echo top height of 9.4 km, average maximum VIL content of 12.8 kgm-2. The radar echo PPI of the super monomer storm has a "V"-shaped gap, the vertical structure RHI has a WER or BWER, there is a boundary weak echo area or weak echo area is larger, the weaker echo area of the upper echo region is stronger, the higher the height of the weak echo zone, the stronger the hail, the more multicell storm and single-cell storm radar echo value is significantly smaller than the supercell storm. In the past 10 years, the artificial hail suppression in Aksu area should pay attention to the increasing trend of hail in spring and autumn, and the peak period of artificial flood prevention operations was concentrated at 16-19 hours, 1-2 hours ahead of the high ice peak period. |
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| Keywords: | Aksu area hail artificial flood control operations |
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