ZHANG Zhongyi,GUO Shanyun,ZHANG Yang,et al.Analysis of The Temporal and Spatial Distribution Characteristics of Surface Winds and Topographic Effects in The Southwest Sichuan Region under Complex Terrain[J].Journal of Chengdu University of Information Technology,2025,40(04):518-524.[doi:10.16836/j.cnki.jcuit.2025.04.017]
川西南复杂地形区地面风的时空分布特征及地形影响
- Title:
- Analysis of The Temporal and Spatial Distribution Characteristics of Surface Winds and Topographic Effects in The Southwest Sichuan Region under Complex Terrain
- 文章编号:
- 2096-1618(2025)04-0518-07
- 分类号:
- P425
- 文献标志码:
- A
- 摘要:
- 针对川西南地区森林火灾频发、地形复杂及地面风场空间异质性大的问题,分析该地区地面风的空间和时间分布特征,探讨复杂地形对风的影响,以期为森林防灾减灾和资源环境管理提供参考。为此,采用2018-2022年凉山州和攀枝花地区各县级气象站点的地面风向风速记录数据,通过对数据的统计和分析,得到结果:川西南地区风速的空间分布情况大致为西高东低; 平均风速日变化呈现出明显的峰值和谷值,最高值出现在16时,最低值出现在08时; 凉山州地区大风记录主要集中于下午时段,最大风速记录出现在16时,而攀枝花地区大风记录则分散于不同时段,最大风速记录出现于22时; 凉山州和攀枝花地区的平均风速均存在明显的季节性变化,其中凉山州3月平均风速最高,9月最低,而攀枝花地区则是5月平均风速最高,11月最低; 此外,地形对当地风向具有显著影响,部分站点最大频率风向与河谷山脉走向一致,且河谷型站点风速与风向-峡谷夹角之间存在一定程度的负相关。
- Abstract:
- Aiming at the frequent occurrence of forest fires,complex terrain,and significant spatial heterogeneity of ground wind fields in southwestern Sichuan,this study intends to analyze the spatial and temporal distribution characteristics of ground wind in this region and explore the influence of complex terrain on wind patterns.It is hoped that this research can provide valuable references for forest disaster prevention and mitigation as well as resource and environmental management.To this end,ground wind direction and speed records from county-level meteorological stations in Liangshan Prefecture and Panzhihua City from 2018 to 2022 were utilized.Through statistical analysis of the data,the following results were obtained: The spatial distribution of wind speed in southwestern Sichuan generally exhibits a pattern of being higher in the west and lower in the east; the diurnal variation of average wind speed presents distinct peaks and valleys,with the highest value occurring at 16:00 in the afternoon and the lowest value appearing at 8:00 in the morning; strong wind records in Liangshan Prefecture are mainly concentrated in the afternoon,with the maximum wind speed recorded at 16:00,while in Panzhihua City,strong wind records are scattered across different time periods,with the maximum wind speed occurring at 22:00 at night; both Liangshan Prefecture and Panzhihua City exhibit significant seasonal variations in average wind speed,with the highest average wind speed occurring in March in Liangshan and the lowest in September,while in Panzhihua,the highest average wind speed is observed in May and the lowest in November; furthermore,the local terrain has a significant impact on wind direction,with the most frequent wind direction at some stations aligning with the direction of river valleys and mountain ranges,and there is a certain degree of negative correlation between wind speed and the angle between wind direction and canyon at river valley stations.
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备注/Memo
收稿日期:2024-01-09
基金项目:四川省科技计划资助项目(2023YFS0383); 四川省自然科学基金资助项目(2023NSFSC0745)
通信作者:郭善云.E-mail:35157800@qq.com