摘要
为明确固原风速风向时空分布特征,利用1991-2023年固原5个国家地面常规气象观测站逐小时风速风向和2011-2022年固原市原州区自动气象观测站逐小时极大风速风向、平均风速风向,利用EOF统计学方法分析该地区风速风向时空分布。结果表明:(1)国家站在春季的月平均风速明显高于其他季节。风速EOF第一模态(方差贡献率78.3%)变化特征为彭阳县风速减小,其他县增加。根据国家站风向分布,固原1、2、11、12月风向主要为西北风或西风,4-10月主要为东南风。(2)与国家站相似,原州区区域站春季月平均(极大)风速显著高于其他季节。寨科、炭山等高海拔站平均风级盛行2~4级风,其他站盛行0~2级风,而须弥山、寨科、炭山和彭堡镇等站极大风级盛行4~5级风,其他站盛行2~3级风。原州区大部分区域站3-10月平均、极大风向主要为东南风或南风,1、2、11、12月主要为西北风或北风,而须弥山、硝口和张易站由于其独特的地理条件,平均、极大风向全年主要为西南风或南风。
In order to clarify the temporal and spatial distribution characteristics of wind speed and direction in Guyuan,hourly wind speed and direction of five national ground conventional meteorological observation stations in Guyuan from 1991 to 2023 and hourly maximum wind speed and direction of average wind speed and direction of automatic meteorological observation station in Yuanzhou District of Guyuan City from 2011 to 2022 were used in this study.The temporal and spatial distribution of wind speed and direction in this region is analyzed by EOF method and other statistical methods.The results showed that:(1)The average monthly wind speed at National Station in spring is significantly higher than in other seasons.The first mode of EOF of wind speed(variance contribution rate 78.3%)is characterized by wind speed decreasing in Pengyang and increasing in other counties.According to the wind direction distribution of the National Station,the wind direction of Guyuan in 1,2,11 and 12 is mainly northwest or west wind,and it is mainly southeast wind in 4-10.(2)Similar to the national station,the monthly average(maximum)wind speed of the regional station in Yuanzhou District in spring is significantly higher than that in other seasons.In the high-altitude stations such as Zike and Tanshan,the average wind level prevails 2-4 winds,and the other stations prevail 0-2 winds,while the maximum wind level prevails 4-5 winds at Xumishan,Zike,Tanshan and Pembao Town stations,and the other stations prevail 2-3winds.The average and maximum wind direction of most regional stations in Yuanzhou District is mainly southeast or south wind in 3-10,and northwest or north wind is mainly northwest or north wind in 1,2,11 and 12,while the average and maximum wind direction of Xumishan,Niokou and Zhangyi stations is mainly southwest or south wind throughout the year due to their unique geographical conditions.
作者
牟仕运
袁淑杰
施红霞
苏丽欣
史海玲
顾娟
翟昱明
MOU Shiyun;YUAN Shujie;SHI Hongxia;SU Lixin;SHI Hailing;GU Juan;ZHAI Yuming(College of Atmospheric Science,Chengdu University of Information Technology,Chengdu 610225,China;Jilin Institute of Meteorological Science,Changchun 130062,China;Guyuan Meteorological Bureau,Guyuan 756000,China)
出处
《成都信息工程大学学报》
2026年第1期108-115,共8页
Journal of Chengdu University of Information Technology
基金
宁夏自然科学基金资助项目(2023AAC02088)
凉山州2023年度科技计划资助项目(23ZDYF0182)
四川省2024年度科技计划资助项目(2024YFTX0016)
福建省灾害天气重点实验室开放课题资助项目(2022KFKT02)。
关键词
宁夏固原
极大风速
平均风速
风速分布
风向分布
Ningxia Guyuan
maximum wind speed
average wind speed
wind speed distribution
wind direction distribution
