云贵高原区平均风速时空特征分析——以贵州省黔西南布依族苗族自治州为例

Spatial and temporal characteristics of average wind speed in Yunnan-Guizhou Plateau area: A case study of Qianxinan Buyi and Miao Autonomous Prefecture

以贵州省黔西南布依族苗族自治州为研究区,利用2008—2015年8个地面气象观测站的逐日平均风速观测资料,采用线性回归、克里金插值方法,从年和季节尺度分析该地区平均风速的时空变化特征。结果表明:从时间格局来看,黔西南布依族苗族自治州年内1月平均风速呈波动上升趋势,而7月呈现出波动下降的变化状态;年际平均风速相对于年内而言变化幅度较大且呈上升趋势;春夏秋三季的平均风速都呈波动上升趋势,夏季出现双峰现象,秋季出现双低谷现象,冬季平均风速变化幅度小;从空间格局来看,2008—2015年年际与年内四季平均风速的空间变化都呈现相似的特征:自北向南呈现条带状,由西向东逐渐递增。

With Qianxinan Buyi and Miao Autonomous Prefecture as the research area,the time-space variation characteristics of the average wind speed in this area are analyzed by linear regression kriging interpolation method based on the daily average wind speed observation data of 8 ground meteorological observation stations in 2008 and 2015.The research findings show that:(1)in view of the time pattern,the average wind speed in Qianxinan Buyi and Miao Autonomous Prefecture shows a fluctuating upward trend in January and a fluctuating downward trend in July,and the annual average wind speed has a larger range and an upward trend relative to the year.(2)the average wind speed in spring,summer and autumn shows a fluctuating upward trend,with double peaks in summer,double valleys in autumn and small changes in winter.(3)from the perspective of spatial pattern,the spatial variation of the average wind speed in the four seasons of 2008 and 2015 show similar characteristics:a strip from north to south,gradually increasing from west to east.