Journal of Arid Meteorology

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Characteristics of Disastrous Weather in Airport Expressway of Xi’an-Xianyang

WANG Dan1, GAO Hongyan1, HUANG Shaoni2, MA Lei1   

  1. 1. Shaanxi Meteorological Service Center, Xi’an 710014, China;
    2. Shaanxi Meteorological Observatory, Xi’an 710014, China
  • Online:2016-08-31 Published:2016-08-31

西—咸机场高速公路灾害性天气特征

王丹1高红燕1黄少妮2马磊1   

  1. 1.陕西省气象服务中心,陕西西安710014;2.陕西省气象台,陕西西安710014
  • 作者简介:王丹(1986- ),女,陕西渭南人,硕士,工程师,主要从事气象预报服务工作. E-mail: dandan-w@live.cn
  • 基金资助:

    陕西省气象局预报员专项(2015Y-9)和陕西省气象局“精细化气象格点预报攻关团队”共同资助

Abstract:

Based on the meteorological observation data from 3 meteorological stations of traffic in airport expressway of Xi’an-Xianyang from 2 July 2013 to 2 July 2015 and near 6 weather stations within 20 km from 1 January 2007 to 30 April 2015, the characteristics of disastrous weather in airport expressway of Xi’an-Xianyang were analyzed. The results showed that the fog often occurred from mid-night to morning, and the heavy fog often occurred from 06:00 to 08:00. The heavy rainfall and above mainly occurred in July, August and September, and the short-term heavy rainfall was more likely to occurred in the nighttime than in the daytime. Snowfall mostly occurred in January and February. Strong wind was more likely to occur in spring than in other seasons. The road icing usually occurred in January and December, and it’s easy to ice on wet and watering roads with more than 85% probability when the daily air temperature was lower than -1.4 ℃ in airport expressway of Xi’an-Xianyang. The data from weather stations within 20 km near the expressway can provide reference for traffic meteorological service, but it is slightly different from the observation from traffic meteorological stations in the expressway. For the improvement of the meteorological service ability of traffic in expressway, the construction of traffic meteorological station and observtion network should be accelerated and perfected.

Key words: expressway, meteorological station of traffic, disastrous weather  

摘要:

利用2013年7月2日—2015年7月2日西—咸机场高速公路段交通气象站及其20 km范围内区(县)气象站2007年1月1日—2015年4月30日的观测资料,对影响交通运输安全的灾害性天气进行规律性分析。结果表明,雾多出现在夜间至清晨,其中06:00—08:00是大雾易发时段。大雨及以上量级降雨主要发生在7—9月,其中短时强降雨多发生在夜间,而降雪多发生在1—2月,大风多发生在春季。1月和12月是道路结冰易发时期,当日最低气温≤-1.4 ℃时,西—咸机场高速公路段在潮湿或者有积水的路面出现结冰的概率≥85%。高速公路沿线的区(县)气象站观测资料可以作为交通气象服务的参考数据,但交通气象站与其相邻区(县)气象站灾害性天气的监测数据有一定差异。为了提高交通气象服务能力,应该加快高速公路交通气象站建设,完善交通气象观测网。

关键词: 高速公路, 交通气象站, 灾害性天气

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