GUO Ping,LI Bin,DUAN Shaoling,et al.Statistical Characteristics of Rainy Season Fog at Cangyuan Washan Airport in Yunnan Province from 2017 to 2021[J].Journal of Chengdu University of Information Technology,2024,39(06):755-760.[doi:10.16836/j.cnki.jcuit.2024.06.016]
2017-2021年云南沧源佤山机场雨季雾的统计特征
- Title:
- Statistical Characteristics of Rainy Season Fog at Cangyuan Washan Airport in Yunnan Province from 2017 to 2021
- 文章编号:
- 2096-1618(2024)06-0755-06
- Keywords:
- Washan airport; fog; rainy season; moisture; surface meteorological elements; statistical characteristics
- 分类号:
- P426
- 文献标志码:
- A
- 摘要:
- 为研究云南沧源佤山机场(简称佤山机场)遮挡跑道入口的雾的天气特征,利用机场2017-2021年地面逐日气温、降水、风、湿度以及人工观测天气现象等资料和ERA5逐日再分析资料,统计分析机场雾的时间变化、地面气象要素以及影响天气系统的基本特征。结果表明:雾年平均日数137.2 d,主要集中在当地雨季即6-10月(占全年的80%),7-9月出现日数最多,为26 d左右,但影响航班以7月、8月和10月日数最多。在2~3 m/s的偏东风或3~5 m/s的偏西风作用下,山谷里的低云抬升至跑道入口形成雾,上午出现次数多于下午,多出现在05-10时(北京时),持续时间短则40 min,长则6~9 h,影响航班的时段大部分在14时之前。主要影响天气系统为西行热带低压和西北太平洋副热带高压(简称副高)、两高(副高与青藏高压)辐合、低涡切变线与西南季风。
- Abstract:
- To study the weather characteristics of the fog blocking the runway entrance at Yunnan Cangyuan Washan Airport(referred to as Washan Airport),using the daily surface temperature,precipitation,wind,humidity,and artificially observed weather phenomena at the airport from 2017 to 2021 as well as daily reanalysis data from ERA5,the temporal variation of airport fog,surface meteorological elements and basic characteristics affecting weather systems are statistically analyzed. The results show:The annual average number of fog days is 137.2 days,mainly concentrated in the local rainy season from June to October(accounting for 80% of the whole year),the highest number of days occur from July to September each year which is about 26 days,but the number of days affecting flights is the largest in July,August and October.Under the influence of easterly winds ranging from 2 to 3 m/s or westerly winds ranging from 3 to 5 m/s,low clouds in the valley rise to the runway entrance to form fog,they appear more frequently in the morning than in the afternoon,mostly from 5 to 10 o’clock(Beijing time),with a duration of as short as 40 minutes and as long as 6 to 9 hours,Most of the time periods that affect flights are before 14 o’clock.The main weather systems are the westward tropical depression,the northwest Pacific subtropical anticyclone(referred to as the subtropical high),the convergence of the two highs(subtropical high and Tibetan high),the low vortex shear line and the southwest monsoon.
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备注/Memo
收稿日期:2024-05-20
基金项目:国家自然科学基金面上资助项目(42075013); 云南重点研发计划-社会发展专项资助项目(202203AC100006); 云南省科技厅科技计划资助项目(202305AM070004)
通信作者:张万诚.E-mail:wanzhangcheng@163.com