关键词: 艾比湖, 气候变化, 气候突变, 沙尘

Abstract: Many researches about the changes of ecology and environment in Ebinur Lake area proved that human activities have resulted in the extension of oases on the one hand,and the increase of saline desert area due to over water-use for irrigation,industries and living of peoples on the other hand.In this paper,the sand-dust climate change trend in Ebinur Lake area was studied through analysis on the measured data of 5 weather stations in the study area from 1961-2001.The results show that climate has changed obviously,the air temperature has raised and the precipitation has increased but unevenly distributed.Meanwhile,the occurring days of sand-dust storm and gale have decreased,but the occurring days of dust floating have obviously increased.The frequency of high wind speed has decreased and that of low wind speed has increased in Atalaw Pass.The decrease of occurring days of gale has weakened the ability of evaporation.On the other hand,the jump test to occurring days of sand-dust shows the climate change was discontinuously.There was certain correlativity;the relative coefficient between the dried bottom area of the lake and the total occurring days of sand-dust is 0.59.Studies show that the sand-dust climate in Ebinur Lake area was influenced by both the global climate change and the desertification caused by lake water decreasing due to human activities.

Key words: Ebinur lake, climate change, climate jump, sand dust