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张月华,王健,谢葭颖,郑玉萍.风廓线雷达资料在乌鲁木齐一次大暴雪过程分析中的应用[J].沙漠与绿洲气象,2019,13(5):49~54
风廓线雷达资料在乌鲁木齐一次大暴雪过程分析中的应用
The Application of Wind Profile Radar products in A Rain and Snow Mixed to Heavy Snowfall in Urumqi
投稿时间:2019-02-16  修订日期:2019-04-23
DOI:10.12057/j.issn.1002-0799.2019.05.007
中文关键词:  风廓线雷达资料  大暴雪 冷暖平流
英文关键词:Wind Profile Radar Data Heavy Snowfall Cold and warm advection
基金项目:
作者单位E-mail
张月华 新疆乌鲁木齐市气象局 wlmqmm@163.com 
王健 新疆乌鲁木齐市气象局  
谢葭颖 新疆乌鲁木齐市气象局  
郑玉萍 乌鲁木齐市气象局  
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中文摘要:
      本文利用乌鲁木齐市边界层风廓线雷达资料对2018年10月17-18日一次短时毛毛雨、雨夹雪转大暴雪天气过程进行分析,结果表明这次雨雪前探测高度增加了近5km,降雪结束后探测高度明显降低;水平风场显示冷空气先从底部楔入,暖气团被迫抬升;高空有强盛的西南急流下传,雨雪期间西南高空急流维持,高空急流消失降雪结束;垂直速度不仅可以反应雨雪的开始和结束时间,还能区分降水的不同相态;大气结构折射率常数显示雨雪时段对应着Cn2的大值区。可见风廓线雷达资料不仅能很好地反映中小尺度系统的演变,也能反映出大尺度流场变化特征,可以精确地捕捉到本站上空连续的大气变化,这对短时天气预报、灾害性天气的预警来说有很高的应用价值。
英文摘要:
      Using the wind profiler radar products in Urumqi, it analyzed a process of short-time drill to rain and snow mixed to heavy snowfall on October 17-18, 2018 in Urumqi. The results indicate: before the precipitation the detect height is lifted nearly 5km, the detect height obviously reduces at the end of the precipitation; The horizontal wind field showed that the cold air first wedged from the bottom and the warm air is forced to rise; There is a strong southwest jet stream download at high altitude, the southwest jet stream lasts during the rain and snow period, the high altitude rapid disappears at the snowfall end. The vertical velocity can not only reflect the beginning and end time of precipitation, but also reflect different phase state of precipitation. The atmospheric refractive index structure constant (CN2) shows the large value area corresponding to the snowfall period. It is visible that the wind profile radar data can not only reflect the evolution of the meso-and micro-scale system, but also reflect the characteristics of large-scale flow field changes, which can accurately capture the continuous atmospheric changes over the station. It has a high application value for short-term weather forecasting and catastrophic weather warning.
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