Change in Surface Mean Wind Speed of Northeast China during the Period of 1971 -2010
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.
surface wind speedclimate changedecadal variabilitynortheast China
国家科技期刊平台
NSTL
万方数据
维普
