1971-2010年东北三省平均地面风速变化  

Change in Surface Mean Wind Speed of Northeast China during the Period of 1971-2010

作　　者：金巍[1,2] 任国玉[3] 曲岩[2] 刘晓玲[4] 

机构地区：[1]南京大学大气科学学院,江苏南京210093 [2]辽宁省鞍山市气象局,辽宁鞍山114004 [3]中国气象局气候研究开放实验室,国家气候中心,北京100081 [4]中国气象局气象干部培训学院,北京100081

出　　处：《干旱区研究》2012年第4期648-653,共6页Arid Zone Research

基　　金：国家公益性行业专项(201206024);国家科技支撑计划课题(2007BAC29B02);中国气象局2010年气候变化专项(062700s010c01)资助

摘　　要：利用1971-2010年逐月观测资料,分析东北三省年、季节和月平均地面风速变化的时空特征。结果表明:①东北三省年平均地面风速变化呈显著递减趋势,变化速率为-0.23 m.s-1.(10 a)-1,1971-2000年(前30 a)、1981-2010年(近30 a)和1991-2010年(近20 a)平均地面风速变化均呈显著递减趋势,线性变化速率分别达-0.25 m.s-1.(10 a)-1、-0.20 m.s-1.(10 a)-1和-0.17 m.s-1.(10 a)-1,均通过了0.001显著性检验;②近40 a东北三省各季和逐月平均地面风速变化趋势呈显著递减趋势,均通过了0.001显著性检验;春季递减速率最大,冬、秋季次之,夏季最小;③近40 a东北三省地面年平均风速的趋势变化除个别站点外,其他均呈现出比较一致的显著递减趋势,但最近20 a呈显著递减趋势的站点数在减少,递增趋势的站点数增多。In this paper, the data of monthly surface wind speed in northeast China during the period from 1971 to 2010 were used to study the temporal and spatial change of average surface wind speed in three provinces （Liaoning, Jilin and Heilongjiang） in northeast China. The results are as follows： （1） For the entire period （40 years）, the mean surface wind speed in -0.23 m . s-1. （10 a）-1 these three provinces during the 40-year period was significantly decreased with a rate of During the 30-year periods of 1971 -2000 and 1981 -2010 as well as the 20-year period of 1991 -2010, mean surface wind speed was in a significant decrease trend with rates of -0. 25 m . s-1 . （10 a） -1, -0.20 m . s-1. （10 a） -1 and -0.17 m . s-1 . （10 a） -1 , and the values were all statistically signifi- cant at 0. 001 confidence level; （2） For the entire study period, the average seasonal surface wind speed was signifi- cantly decreased, and the decrease was the most significant in spring, then in winter, fall and summer. All seasonal trends for the whole period were significant at 0.001 confidence level. The average monthly surface wind speed was also consistently decreased; （3） Average annual wind speed in northeast China in recent 40 years was significantly decreased except that at one or two stations. During recent 20 years, the average surface wind speed was in a de- crease trend in most areas, but the sites with significant decrease trend were in a reduction, and those with increase trend were in an increase, especially in the central and western oarts of northeast China in recent 10 vears.

关 键 词：地面风速 气候变化 年代变异 东北三省 

分 类 号：P468.026[天文地球—大气科学及气象学]