土右旗地面气象站信息化风要素数据统计分析

Analysis and Statistics on the Information Data of Surface Wind Elements in Tuyou County

利用近30年的包头地区气象信息化数据,采用气象资料整编和统计方法,对包头地区土右旗气象观测站风向风速年、月、日变化进行了统计分析,结果表明,近30年土右旗年主导风向为E风,出现频率为11.5%,W风的出现频率也较高,为9.1%,静风的年出现频率为20.3%;全年以NNW方向的风平均风速最大,为3.3 m/s。1～4、10～12月份主导风向均为W,出现频率在9.4%～12.3%;5～9月份主导风向均为E,出现频率为11.6%～19.3%。近30年土右旗年平均风速为2.1 m/s,4月份最大,1月份最小;近20年逐小时10 min平均风速均以夜间至凌晨较小且处于平稳状态,日出以后风速随着时间推移逐渐增大,15:00左右达到一日中的最大值,此后平均风速随着时间推移逐渐减小。

According to the meteorological information data in Baotou in past 30 years, the annual, monthly and diurnal variations of wind direction and wind speed in Tuyou County weather station were statistically analyzed. As indicated by the results, the dominant wind in Tuyou County is E wind, with an occurrence frequency of 11.5%, the frequency of W wind is as high as 9.1%, the annual frequency of static wind is 20.3% ; the average speed of NNW wind is the largest of 3.3 m/s. The dominant wind is W wind from January to April and from October to December with an occurrence frequency of 9.4% - 12.3% ; the dominant wind from May to September is E wind with a frequency of 11.6% - 19.3%. The average wind speed in Tuyou County in past 30 years is 2.1 mg/s, the largest in April and the smallest in January; The average wind speed is relatively small and stable during the night, and it gradually increases after the sun rise, then reaches the maximum at 15：00, and gradually decreases thereafter in past 20 years.