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《Journal of Glaciology and Geocryology》 2007-04
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Climate Changes and Ecological Effects of the Grasslands in the First Meander of the Yellow River

YAO Yu-bi1,2,3,YIN Dong1, WANG Rong-yuan1,DENG Zhen-yong1,ZHANG Xiu-yun3(1.Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province and China Meteorological Administration,Lanzhou Institute of Arid Meteorology,China Meteorological Administration,Lanzhou Gansu 730020,China;2.Chengdu Institute of Plateau Meteorology,China Meteorological Administration,Chengdu Sichuan 610071,China;3.Meteorological Bureau of DingxiCity,Dingxi Gansu 743000,China)  
Using the main meteorological and ecological data observed in the grasslands of the first meander of the Yellow River,the climate changes and eco-environment effects of the grasslands in the first meander of the Yellow River were analyzed.The results show that in the first meander of the Yellow River,the annual precipitation tended to decrease and fluctuated with three periods: 2~4 years,6~7 years and 10~11 years.The annual mean temperature was remarkably warmer than that in other regions of China;the departure of annual temperature was low before 1983 and high after 1984.The annual mean aridity index of the grasslands tended to increase.There are many serious ecological problems in this area at the present time: fearful degeneration of ecological,desertification of grassland,obvious shortage of water resources,and quick decrease of bio-diversity.All of these are caused by both climate changes and human activity.
【Fund】: 科技部科研院所社会公益研究专项(2005DIB3J100);; 中国气象局成都高原气象研究所高原气象开放基金项目(IPM2006014);; 甘肃省科学技术攻关计划项目(ZGS042-A44-017);; 干旱气象科学研究基金项目(IAM200710)资助
【CateGory Index】: S812
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