近44年临夏地区风特征分析  

Analysis on the Wind Features in Linxia Area in Recent 44 Years

作　　者：贾小琴[1,2] 尹宪志[1] 傅正涛[1] 王琨[1] 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化减灾重点实验室,甘肃兰州730020 [2]甘肃省临夏州气象局,甘肃临夏731100

出　　处：《安徽农业科学》2012年第25期12559-12561,12550,共4页Journal of Anhui Agricultural Sciences

基　　金："十一五"国家科技支撑计划重点项目(2008BAC40B04-2)

摘　　要：利用1968～2011年临夏地区6个气象站风速风向观测资料,采用线性趋势分析、风向频率玫瑰图等方法,分析了临夏地区风速风向空间分布特征及风速的年际、季节、月际变化特征。结果表明,近44年临夏地区平均风速为1.4 m/s;春季最大,夏季次之,冬季最小;年平均最大风速为12.6 m/s,近44年年平均风速、最大风速均呈下降趋势,年平均大风日数在1.1～11.3 d;年内最多风向为N风,WSW、E风次之,WNW风最少。According to the wind observation data of six stations in Linxia from 1968 to 2011,the spatial distribution features of wind speed and direction as well as the annual,seasonal and monthly variation features of wind speed in Linxia were analyzed with the linear trend method and the wind direction frequency rose.As indicated by the results,the average wind speed in Linxia during the recent 44 years was 1.4 m/s,the largest in spring,the medium in summer and the smallest in winter;the annual maximum wind speed was 12.6 m/s;during the 44 years,both the average wind speed and maximum wind speed showed declining tendency,the days with large wind was about 1.1-11.3 d during the whole year,the wind in the whole years was mostly N wind,then followed by the WSW and E wind,WNW wind was the least.

关 键 词：风 风速变化 特征分析 临夏地区 

分 类 号：S161.7[农业科学—农业气象学]