摘要
利用新津机场近11年冬季逐时气象资料,对本场能见度(VIS)的各种变化特征进行分析。结果表明:累年各月逐时最小VIS和平均VIS,12月和1月最小;各月、各观测时次出现日最低VIS频率的情况基本一致,9点前均大于15%,其后迅速减小;小于1.8 km VIS的出现情况在各月中的分布是:11月在11点前出现频率最大,12月和1月在13点前频率最大,2月在10点前频率最大;VIS小于1 km时,各月、各阶段持续时间的发生次数呈波动变化,在持续3-5小时后迅速减少,1-1.8 km时,除11月,均在持续2小时后明显减少,大于1.8 km后,对应的变化趋势为一致的单调递减,持续1小时后明显减少。
Based on the hourly winter meteorological data of the recent 11 years in Xinjin airport,the variation characteristics of the visibility are analyzed. The result shows that the hourly minimum and mean VIS are the smallest in December and January and the daily minimum VIS of each month are greater than 15% before 9 o＇clock followed by a rapid decrease thereafter. The distribution of the VIS less than 1.8km in each month is as follows. The maximum probability occurs before 11 o＇clock in November, before 13 o＇clock in December January, and before 1o o＇clock in February. With the case of VIS less than 1km, it changes in different months. It usually decreases rapidly after lasting 3- 5 hours. With VIS 1- 1.8km,the occurrence normally reduces significantly after lasting 2 hours except in November. With VIS greater than 1.8km, the variation trend presents a monotonically decreasing,cutting down significantly after 1 hour duration.
出处
《中国民航飞行学院学报》
2016年第1期76-80,共5页
Journal of Civil Aviation Flight University of China
基金
中国民航飞行学院青年科学基金项目(Q2013-138)
关键词
能见度
出现频率
持续时间
Visibility
Probability of occurrence
Time of duration
