关键词: 气象要素, 气候变化, 空间分布, 河西走廊东部

Abstract: Based on the date of four weather stations’temperature,precipitation,strong wind and sandstorm in Wuwei city of Gansu province from 1959 to 2018,its spatial-temporal variable characteristics were analyzed using linear tendency estimation,slip t-examine,wavelet method,power spectrum,et al.The results showed that the annual mean temperature increased constantly with an interannual propensity rate of 0.40 ℃/10a,and this warming trend was sudden.The seasonal warming speed from high to low was winter,autumn,spring and summer.The spatial variation was characterized by a faster warming speed in the north-central than in the south.Precipitation showed fluctuation increasing trend with an interannual propensity rate of 6.1 mm/10a.Except for autumn,precipitation in other seasons showed an increasing trend,and increase rate from big to small was summer,spring and winter.The spatial variation of precipitation was fast in the south and slow in the middle.There was a downward trend in windy weather with an interannual propensity rate of -0.4 d/10a.The decrease in spring winds offset the increase in winter,and the most significant decrease was in summer.Spatial change of strong wind showed an increasing trend in the south and a decreasing trend in the north-central.The sandstorm significantly reduced with an interannual propensity rate of -2.8 d/10a,and its reduced speed from big to small was spring and summer,winter,autumn.In space,there was a gradual increase in the speed reduction of sandstorm from south to north.The trend of warm and humid climate in Wuwei city was obvious.The wind and sandstorm have been significantly reduced,the ecological environment has been improved with the increase of comprehensive management of the Shiyang river basin.

Key words: meteorological elements, climate change, spatial distribution, eastern Hexi corridor