MOU Shiyun,YUAN Shujie,SHI Hongxia,et al.Vertical Distribution Characteristics of Wind Speed and Direction at Pingliang Sounding Station[J].Journal of Chengdu University of Information Technology,2026,41(02):192-198.[doi:10.16836/j.cnki.jcuit.2026.02.009]
平凉探空站风速风向垂直分布特征
- Title:
- Vertical Distribution Characteristics of Wind Speed and Direction at Pingliang Sounding Station
- 文章编号:
- 2096-1618(2026)02-0192-07
- Keywords:
- Pingliang sounding station; average wind speed; wind scale distribution; wind direction distribution; vertical wind shear
- 分类号:
- P425
- 文献标志码:
- A
- 摘要:
- 为明确平凉地区风速垂直分布特征,利用2012-2022年平凉探空站各高度逐日08时和20时风速风向资料,应用统计学方法分析平凉站风速风向垂直分布。结果表明:(1)根据各月风级分布特点,可以将大气分为4层:第一层地面到400 hPa,风速随高度的上升而上升; 第二层400～100 hPa,除7-8月外主要为12级风; 第三层100～70 hPa,风速随高度的增加而减小; 第四层70 hPa以上,6-9月风速随高度的增加而增加,其他月反之。(2)08时数据和20时数据不同点为第一层近地面盛行风向不同,08时数据风向主要为西风或西北风,而20时数据主要为东南风。高层二者相似,850～400 hPa主要为西风或西北风,第二层和第三层风向主要为西风,第四层6-9月主要为东风,其他月主要为西风。(3)整层大气风速高值区集中在第二层,在70 hPa以下7、8月平均风速和垂直风切变绝对值相较于其他月份显著偏小,说明7、8相较于其他月大气更为稳定,70 hPa以上反之。
- Abstract:
- In order to clarify the vertical distribution characteristics of wind speed in Pingliang area, this paper analyzes the vertical distribution of wind speed and direction at 08:00 and 20:00 every day at various altitudes of Pingliang Sounding Station from 2012 to 2022 by using statistical methods. The results show that:(1)According to the distribution characteristics of monthly wind scale, the atmosphere can be divided into four layers: the first layer is from the ground to 400 hPa, and the wind speed rises with the rise of height; The second layer 400-100 hPa, July and August outside the main 12 wind; The third layer is 100-70 hPa, and the wind speed decreases with the increase of height. The fourth layer is above 70 hPa, and the wind speed increases with the increase of height from June to September, and vice versa in other months.(2)The difference between the data at 08:00 and 20:00 is that the prevailing wind direction near the ground at the first layer is different. The wind direction at 08:00 is mainly west wind or northwest wind, while the wind direction at 20:00 is mainly southeast wind. At 850-400 hPa, both of them are mainly west or northwest wind, the second and third layers are mainly west wind, the fourth layer is mainly east wind from June to September, and the other months are mainly west wind.(3)The high value area of atmospheric wind speed in the whole layer is concentrated in the second layer. The average wind speed and absolute value of vertical wind shear in July and August are significantly smaller than those in other months when the value is below 70 hPa, indicating that the atmosphere is more stable than that in other months when the value is above 70 hPa.
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备注/Memo
收稿日期:2025-01-07
基金项目:宁夏自然科学基金资助项目(2023AAC02088); 凉山州科技计划资助项目(23ZDYF0182); 四川省科技计划资助项目(2024YF TX0016); 干旱气象科学研究基金资助项目(IAM202004)
通信作者:袁淑杰.E-mail:ysj@cuit.edu.cn