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《Geographical Research》 2009-02
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Responses of the environment to climate variations in Gonghe basin

CHEN Ying-yu1,2,JIANG Fu-chu1,3(1.Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;2.Qinghai University,Xining 810006,China;3.State key Laboratory of LakeScience and Environment,CAS,Nanjing 210008,China)  
This paper studied the responses of the environment to the climatic changes by using the temperature and precipitation data at Gonghe station covering the period from 1953 to 2005.The results show that:(1)The annual average temperatures in the area showed a marked increasing trend,with a rate of about 0.28℃ per 10 years,higher than the mean values for China and the whole world.The seasonal temperatures and precipitation showed different increasing trends.The temperatures rose more significantly in autumn(from September to November)and winter(from December to next February),while spring(from March to May)and summer(from June to August)witnessed a slower temperature increase.The annual precipitation showed a slight increasing trend.In summer and autumn,the precipitation showed a tendency to decrease year by year,and more marked decrease was recorded in autumn.However,in spring and winter the precipitation shows a tendency to increase year by year.(2)The warmer and drier climate is the key factor leading to the environmental problems such as desertification,grassland degradation,frequent disasters and decreasing runoff,which have had great effects on the socio-economic development and environment in this area.(3)The Gonghe basin is one of the sensitive and vulnerable areas to the climate change on the Tibetan Plateau and even in the world.
【Fund】: 国家自然科学基金项目(40772211);; 中国科学院湖泊沉积与环境重点实验室基金项目(HB0304)
【CateGory Index】: P467
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