基于分钟尺度风资料对观测环境评估的研究  

Research on Assessment of Observation Environment Based on Minutely Wind Data

作　　者：严婧[1] 王海军[1] 闫荞荞[1] 程亚平[1] 匡晓为 Yan Jing;Wang Haijun;Yan Qiaoqiao;Cheng Yaping;Kuang Xiaowei(Hubei Meteorological Information and Technology Support Center,Wuhan 430074,China)

机构地区：[1]湖北省气象信息与技术保障中心,武汉430074

出　　处：《气象与环境科学》2023年第1期48-57,共10页Meteorological and Environmental Sciences

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0196000);中国气象局气候变化专项(CCSF201821);湖北省气象局科技发展基金年轻科技人员专项(2016Q08);湖北省气象局科技发展基金年轻科技人员专项(2020Q08)。

摘　　要：为自动化评估地面观测环境,以湖北省襄阳站为例,利用该站2006-2014年分钟、小时风观测资料,以及观测环境资料,计算了该站迁站前后不同方位的风向频率、各风向平均风速、各风向各等级风速的频率、湍流强度、风向标准差和粗糙度长度。统计计算结果表明:襄阳站2011年西北、西南方向新增建筑物后,2011-2012年220°-320°方位的平均粗糙度长度较2006-2010年的增大了70%;2013-2014年该站迁站后粗糙度长度较2006-2012年的降低了73%,粗糙度长度与障碍物仰角的相关系数为0.64,为6个指标中最高。粗糙度长度的变化,可反映观测场不同方位障碍物的变化。因此可利用粗糙度长度对观测环境进行评估与监测。这一研究结果还可为不同方位不同量级风速的均一性研究、建筑设计、城市规划等领域合理应用数据提供科学依据。In order to evaluate and monitor the environment of the ground observation site automatically,taking Xiangyang station in Hubei province as an example,based on the minutely and hourly wind data and the detection environment data at Xiangyang Station from 2006 to 2014,this paper computes the yearly frequency of wind direction,average wind speed at different wind directions,frequency of each level of wind speed at different wind directions,turbulence intensity,standard deviation of wind direction,and roughness length before and after the relocation of this station.The statistical results indicate that the average roughness length at 220°—320°direction increases 70%in 2011—2012 compared with that from 2006 to 2010 after the new buildings in northwest and southwest directions were built in 2011 at Xiangyang Station.However,the average roughness length at Xiangyang Station decreases by 73%after the station relocation in 2013—2014 compared with that in 2006—2012.The correlation coefficient between roughness length and the angle of elevation of obstacles is 0.64 which is the highest among the six parameters.The variation of roughness length can reflect the changes of obstacles in different directions of the observation field.Therefore,roughness length in different aspects is able to be regarded as an index for quantitative assessment of observed environment.Roughness length can not only be applied to evaluate the observational environment automatically,but also be applied to provide scientific data for studying the homogeneity of wind speed in different directions and wind speed at different grades,architectural design and city planning.

关 键 词：观测环境 风 障碍物 

分 类 号：P412.16[天文地球—大气科学及气象学]