1981-2020年河南省近地面风速时空分布特征  

Spatio-temporal Distribution Characteristics of Near-surface Wind Speed in Henan Province from 1981 to 2020

作　　者：孙睿藻 魏璐 程凯琪 李伊吟 杨婷 谢博宇 Sun Ruizao;Wei Lu;Cheng Kaiqi;Li Yiyin;Yang Ting;Xie Boyu(CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique,Zhengzhou 450003,China;Henan Wind and Solar Energy Meteorological Engineering Research Center,Zhengzhou 450003,China;Henan Meteorological Service Center,Zhengzhou 450003,China;Henan Climate Center,Zhengzhou 450003,China;Electric Power Research Institute of Henan Electric Power Company of State Grid,Zhengzhou 450052,China)

机构地区：[1]中国气象局·河南省农业气象保障与应用技术重点开放实验室,郑州450003 [2]河南省风能太阳能气象工程研究中心,郑州450003 [3]河南省气象服务中心,郑州450003 [4]河南省气候中心,郑州450003 [5]国网河南省电力公司电力科学研究院,郑州450052

出　　处：《气象与环境科学》2024年第3期14-22,共9页Meteorological and Environmental Sciences

基　　金：河南省科技研发计划联合基金(应用攻关类)项目(232103810092、222103810093);中国气象局·河南省农业气象保障与应用技术重点实验室应用技术研究基金面上项目(KM202317);国家自然科学基金项目(42205038)。

摘　　要：利用1981-2020年河南省日平均10 m风速观测资料,对河南省风速的时空分布特征进行了分析评估。结果表明,河南省风速的气候态具有明显的季节循环特征,在冬、春季节地表风速较大,夏、秋季节风速较小,并且呈现出东强西弱的空间分布特征。在年循环中2月到3月风速增幅最大,其余月份间的风速演变较为平缓。在风速变化趋势方面,空间分布主要表现为西升东降的特征,豫西从过去风速最弱的地区一跃成为近10年风速最大的地区,这也与其他地区风速整体变弱有关。风速EOF的第二模态表明,河南省风速同时也具有一定的年代际变化特征。此外,风速2-9年的年际变率弱于年代际的,即风速的短期变化具有平稳性;但在气候变化的大背景下,出现了系统性的变化趋势,且具有明显的区域性差异。Based on the observation data of daily average wind at 10 m height in Henan Province in 19812020,the spatial and temporal distribution characteristics of wind speed in Henan Province are analyzed and evaluated.The results show that the climate state of wind speed in Henan Province is featured with obvious seasonal cycles.The surface wind is strong in winter and spring,but weak in summer and autumn.Spatially,the wind speed in the eastern part of Henan is higher than in the western part.In the annual cycle,the wind speed increases the most from February to March,while the wind speed in the other months changes gently.In terms of its variation trend,the wind speed has the spatial characteristics of strengthening in western Henan but slowing down in the eastern part.Especially,the western Henan has altered from the region with the weakest wind to the region blowing strongest wind in the past 10 years,which is also associated with the overall weakening of winds in other regions.The second mode of EOF shows that the wind speed in Henan Province also has certain interdecadal variation characteristics.In addition,the contribution of interannual variability in the 29-year cycle is significantly weaker than that of interdecadal and trend,that is,the short-term change of wind speed is stable.However,in the context of climate change,there has been a systematic trend in the changes of wind speed with obvious regional differences.

关 键 词：10 m平均风速 气候态特征 线性趋势 年际与年代际变率 

分 类 号：P425.4[天文地球—大气科学及气象学]