TAO Jianning,HUA Wei,MA Wentong.Spatial and Temporal Characteristics of Near-Surface Annual Average Wind Speed Variation in Yunnan during 1970-2015[J].Journal of Chengdu University of Information Technology,2024,39(06):727-732.[doi:10.16836/j.cnki.jcuit.2024.06.012]
1970-2015年云南近地面年平均风速时空变化特征
- Title:
- Spatial and Temporal Characteristics of Near-Surface Annual Average Wind Speed Variation in Yunnan during 1970-2015
- 文章编号:
- 2096-1618(2024)06-0727-06
- 分类号:
- P425
- 文献标志码:
- A
- 摘要:
- 为深入探究云南地区风资源分布情况,采用CN05高分辨率格点风速观测资料和ERA5大气再分析格点资料,并使用经验正交分解、小波分析和回归分析等统计分析方法对该地区1970-2015年近地面风速时空变化进行分析。结果表明,1970-2015年云南省气近地面年平均风速为2.17 m/s,并以横断山脉为界,呈现东高西低的反向分布特征。近46 a以来,云南近地面10 m风速总体呈现下降趋势,风速倾向率为-0.013 m·s-1·a-1,且同样存在东西部反向变化的特征。进一步分析发现,云南近地面10 m风速的下降主要与大于3 m/s风速减少有关。此外,对影响云南近地面风速年际变化特征的环流因子进行分析后发现,云南近地面风速年际变化与大西洋年代际振荡(AMO)呈现显著的负相关关系,即AMO处于冷位相时,云南近地面风速显著下降,而当AMO处于暖位相时,云南近地面风速则有所上升。
- Abstract:
- This study investigates the wind resource distribution in Yunnan, China, using CN05 high-resolution grid point wind speed observations and ERA5 atmospheric reanalysis data. Statistical analysis methods, including empirical orthogonal decomposition, wavelet analysis, and regression analysis, are applied to analyze the temporal and spatial variation of near-surface wind speed in the region from 1970 to 2015. The aim is to comprehensively understand the distribution of wind resources in Yunnan and provide a reference for future wind energy development. The findings reveal that the average annual near-surface wind speed in Yunnan Province during 1970-2015 was 2.17 m/s, with a distinctive east-to-west variation along the boundary of the Hengduan Mountains. Over the past 46 years, there has been a decreasing trend in near-surface wind speed, with a rate of-0.013 m·s-1·a-1, consistently showing an inverse variation from east to west. Further analysis indicates that the decline in near-surface wind speed is primarily associated with a decrease in wind speeds exceeding 3 m/s.Additionally, the study identifies a significant negative correlation between the interannual variability of near-surface wind speed in Yunnan and the Atlantic Ocean Interdecadal Oscillation(AMO). Specifically, during the cold phase of AMO, near-surface wind speed in Yunnan experiences a significant decrease, while during the warm phase, it increases.
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备注/Memo
收稿日期:2023-05-27
基金项目:国家自然科学基金资助项目(42275022); 第二次青藏高原综合科学考察研究资助项目(2019QZKK010203)
通信作者:华 维.huawei@cuit.edu.cn