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中国农学通报 ›› 2017, Vol. 33 ›› Issue (24): 101-105.doi: 10.11924/j.issn.1000-6850.casb16070090

所属专题: 农业气象

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

哈密北部春末低涡暴雪过程诊断分析

唐红英,于海跃,陶玉军   

  1. 新疆维吾尔自治区哈密市巴里坤县气象局,甘肃省酒泉市气象局,新疆信息工程学校
  • 收稿日期:2016-07-16 修回日期:2017-01-16 接受日期:2017-01-17 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: 唐红英
  • 基金资助:

Diagnosis Analysis of a Vortex Snowstorm Process in Late Spring in Northern Hami

  • Received:2016-07-16 Revised:2017-01-16 Accepted:2017-01-17 Online:2017-09-05 Published:2017-09-05

摘要: 研究东疆暴雪天气的成因,提高同类灾害性天气的预报水平,为东疆暴雪天气的预报提供参考。采用区域气象自动站观测资料和NCEP/NCAR再分析资料对2016 年5 月20—21 日哈密北部军马场的暴雪天气进行诊断分析。结果表明:暴雪是在极锋急流带明显南伸的背景下,新疆北部低涡和地面冷锋影响下形成的。550~750 hPa 之间强烈的上升运动为暴雪提供动力条件,600 hPa 以下持续的水汽通量散度为暴雪提供水汽,前期的暖平流为降水的出现提供了热力条件,而后的强冷平流使气温下降从而导致降雪的出现。中低层锋生锋消的垂直配置与降水的持续时间有较好的对应关系。极锋急流带明显南伸对暴雪的产生提供有利的环流背景。

关键词: 纳氏比色, 纳氏比色, 铵态氮, 常规法, 速测法, 联合浸提剂

Abstract: To study the causes of snowstorm weather in eastern Xinjiang, improve the forecast level of similar disaster weather, and provide references for forecasting snowstorm, the authors analyzed the regional automatic weather station data and NCEP/NCAR reanalysis data of Junmachang (north of Hami) from May 20 to 21, 2016. The results showed that: the snowstorm was formed by the influence of low vortex and ground cold front in the north of Xinjiang, under the background of the polar front jet stream with obvious south extension; a strong upward motion between 550 and 750 hPa provided power for snowstorm and continuous water vapor flux divergence below 600 hPa provided water vapor for snowstorm; the warm advection of the early stage provided thermal conditions for the appearance of precipitation, and then the strong cold advection decreased the temperature, leading to snowfall; the vertical distribution of the middle to low frontogenesis and frontolysis made a good correlation with the duration of precipitation; significant southward movement of polar front rapid zone provided favorable circulation conditions.