主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2023, Vol. 39 ›› Issue (3): 72-78.doi: 10.3969/j.issn.1673-503X.2023.03.009

• 论文 • 上一篇    下一篇

天津地区低能见度时空特征及其在高速公路气象服务中的应用

任丽媛1(),熊明明2,*(),孙玫玲1,王雪娇1   

  1. 1. 天津市气象服务中心,天津 300074
    2. 天津市气候中心,天津 300074
  • 收稿日期:2021-06-21 出版日期:2023-06-28 发布日期:2023-07-25
  • 通讯作者: 熊明明 E-mail:398188448@qq.com;82203573@qq.com
  • 作者简介:任丽媛,女,1992年生,工程师,主要从事交通气象服务方面研究,E-mail: 398188448@qq.com
  • 基金资助:
    天津科技重大专项与工程“雾霾天气对海事交通影响预报预警技术研究”(18ZXAQSF00130)

Spatial-temporal characteristics of low visibility in Tianjin and its application in expressway meteorological service

Li-yuan REN1(),Ming-ming XIONG2,*(),Mei-ling SUN1,Xue-jiao WANG1   

  1. 1. Tianjin Meteorological Service Center, Tianjin 300074, China
    2. Tianjin Climate Center, Tianjin 300074, China
  • Received:2021-06-21 Online:2023-06-28 Published:2023-07-25
  • Contact: Ming-ming XIONG E-mail:398188448@qq.com;82203573@qq.com

摘要:

利用2017—2020年天津地区交通自动气象站、国家级地面气象观测站、部分区域自动气象站的能见度和降水量观测资料,分析了对高速公路交通安全产生较大影响的低能见度时空特征及其与降水的关系,进而给出各高速公路低能见度风险等级及对应的关键服务期。结果表明:天津地区低能见度年均日数为22.1 d,空间分布差异明显,北部出现频率最多,西部、南部次之,东部最少。低能见度大多集中在9月至翌年2月,且出现频率夜间高于白天,通常在06时前后达到最大。夏季降水对低能见度产生有明显影响,7—8月受降水影响的低能见度约占全部的47.1%,集中发生在13—15时和19时至翌日08时两个时段。低能见度风险等级较高的高速公路约占全部的57.1%,不同高速公路的重点关注路段和关键服务期也有明显差异。

关键词: 低能见度, 降水, 高速公路

Abstract:

Based on the visibility and precipitation observation data from traffic automatic weather stations, national ground meteorological observation stations, and some regional automatic weather stations in Tianjin from 2017 to 2020, the spatial-temporal variation characteristics of low visibility which has a great impact on expressway traffic safety and their relationships with precipitation were analyzed.The risk level of low visibility and corresponding key service period of each expressway were provided.The results show that the number of low visibility days in Tianjin has an annual mean value of 22.1 days and indicates an obvious spatial variability with the highest value in the north, followed by the west and south, and the least in the east.Low visibility is mostly concentrated from September to February of the next year, and the frequency is higher in nighttime than in daytime, usually reaching the maximum around 06:00.Summer precipitation has a significant impact on low visibility, and low visibility affected by precipitation accounts for about 47.1% of the total from July to August, and mainly occurs during 13:00-15:00 and 19:00-08:00.The expressways with higher risk of the low visibility account for about 57.1% of all.There are also significant differences in the concerned sections and key service periods among different expressways.

Key words: Low visibility, Precipitation, Expressway

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