中国民航飞行学院学报

为深入了解民航高高原机场低能见度天气特征,掌握高高原机场低能见度天气变化规律,本文以云南迪庆香格里拉机场为例,利用2013-2022年的地面气象观测资料对机场三个不同等级的低能见度天气特征进行统计分析。结果表明,近十年迪庆香格里拉机场低能见度出现日数呈先增后减趋势,2016年以后有较明显的减少;低能见度天气主要集中在10月至次年1月;秋季和冬季最容易出现低能见度天气,主要为视程障碍现象引起,春季出现次数最少;低能见度天气持续时间以2-4h居多;低能见度天气多在06时发生,在09时-10时结束。

In order to gain a deeper understanding of characteristics of the low visibility at civil aviation high-elevation airports and grasp the changing patterns of low visibility at high-elevation airports,this article takes Yunnan Diqing Shangri La Airport as an example and uses ground meteorological observation data from 2013 to 2022 to statistically analyze the characteristics of the low visibility at the airport at three different levels.The results indicate that the number of days with low visibility at Diqing Shangri La Airport has shown an increasing trend followed by a decreasing trend in the past decade,with a significant decrease after 2016;Low visibility is mainly concentrated from October to January of the following year;Low visibility is most likely to occur in autumn and winter,mainly caused by visual range obstacles,with the least occurrence in spring;The duration of low visibility is mostly 2-4 hours;Low visibility mostly occurs at 06:00 and ends from 09:00 to 10:00.