| 2011年3月川西高原一次区域暴雪过程分析 |
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| 引用本文： | 邓国卫,孙俊,王敏.2011年3月川西高原一次区域暴雪过程分析[J].西南师范大学学报(自然科学版),2018,43(9):115-122. |
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| 作者姓名： | 邓国卫 孙俊 王敏 |
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| 作者单位： | 1. 高原与盆地暴雨旱涝灾害四川省重点实验室, 成都 610071;2. 四川省气候中心, 成都 610071;3. 中国气象局气象干部培训学院四川分院, 成都 610071;4. 四川省甘孜州气象局, 四川 康定 626000 |
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| 基金项目： | 四川省应用基础研究计划重点项目（2016JY0046）；国家自然科学基金重点项目（91337215）；中国气象局预报员专项（CMAYBY2017-064）；高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目（2018-重点-11）. |
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| 摘 要： | 利用0.5°×0.5°的ECWMF再分析资料，常规气象资料，应用天气分析和诊断方法，对2011年3月20日川西高原北部的暴雪天气过程进行系统分析.结果表明：东路和西路冷空气合并使得暴雪区冷空气强度达到寒潮标准，极锋急流偏强是造成此次暴雪重要原因之一；青藏高原南侧局地水汽在偏西风的输送下到达川西高原，成为此次暴雪的主要水汽来源.由于是非典型的水汽输送，所以整个暴雪期间湿层都较薄.此次过程水平运动和垂直运动对锋生都起到了同等重要的作用.
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| 关 键 词： | 暴雪 极锋急流 局地水汽 锋生 |
| 收稿时间： | 2018/2/9 0:00:00 |
Analysis of Heavy Snow in the Western Sichuan Plateau Caused by Local High Humidity in Tibetan Plateau |
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| DENG Guo-wei,SUN Jun,WANG Min.Analysis of Heavy Snow in the Western Sichuan Plateau Caused by Local High Humidity in Tibetan Plateau[J].Journal of Southwest China Normal University(Natural Science),2018,43(9):115-122. |
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| Authors: | DENG Guo-wei SUN Jun WANG Min |
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| Institution: | 1. Heavy Rain and Drought Flood Disasters in Plateau and Basin Key Laboratory, Chengdu 610071, China;2. Sichuan Climate Center, Chengdu 610071, China;3. Sichuan Branch, China Meteorological Administration Training Centre, Chengdu 610071, China;4. Ganzi Meteorological Bureau, KangDing Sichuan 626000, China |
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| Abstract: | Based on the observation data and ECWMF 6 h reanalysis data for a very severe snowstorm occurred in the north of Western Sichuan Plateau during 20 Mar 2011 has been analyzed and diagnosed. The results show that the cold air combination of East and West roads makes the cold air reach the cold wave standard. The stronger polar front jet is one of the important causes of the snowstorm. The local water vapor on the south side of the Qinghai-Tibetan Plateau reaches the Western Sichuan Plateau under the action of the westerly wind, it becomes the main water vapor source of the severe snowstorm. Because of the untypical water vapor transport, the wet layer is thinner during the whole blizzard. Horizontal movement and vertical movement play an equally important role on the frontogenesis in this process. |
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| Keywords: | snowstorm polar front jet local water vapor frontogenes |
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