Modeling the Roles of Precipitation Increasing in Glacier Systems Responding to Climate Warming - Taking Xinjiang Glacia
The studies on prediction of climate in Xinjiang almost show that the precipitation would increase in the coming 50 years, although there were surely some uncertainties in precipitation predictions.On the basis of the structure of glacier system and nature of equilibrium line altitude at steady state (ELAo), a functional model of the glacier system responding to climate changes was established, and it simultaneously involved the rising of summer mean temperature and increasing of mean precipitation.The results from the functional model under the climatic scenarios with temperature increasing rates of 0.01, 0.03 and 0.05 K/year indicated that the precipitation increasing would play an evident role in glacier system responding to climate change: if temperature become 1℃ higher, the precipitation would be increased by 10%, which can slow down the glaciers retreating rate in the area by 4%, accelerate runoff increasing rate by 8% and depress the ELAo rising gradient by 24 m in northern Xinjiang glacier system where semi-continental glaciers dominate,while it has corresponding values of only 1%, 5 % and 18m respectively in southern Xinjiang glacier system,where extremely continental glaciers dominate.
作 者： WANG Xin XIE Zichu LIU Shiyin TAO Jianjun HAN Yongshun YANG Yuelong 作者单位： WANG Xin(Research Institute of Geo-spatial Information Science, Hunan University of Science & Technology, Xiangtan 411201, Hunan, China;Key Laboratory of Ice Core and Cold Region's Environment, Cold and Arid Regions Environmental and Engineering Research Institute ,CAS, Lanzhou 730000, China)XIE Zichu(Institute of Resources and Environment, Hunan Normal University, Changsha 410081,China;Key Laboratory of Ice Core and Cold Region's Environment, Cold andArid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China)
LIU Shiyin(Key Laboratory of Ice Core and Cold Region's Environment, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China;Institute of Tibetan Plateau Research, CAS, Beijing 100029, China)
TAO Jianjun,HAN Yongshun,YANG Yuelong(Research Institute of Geo-spatial Information Science, Hunan University of Science & Technology, Xiangtan 411201, Hunan, China)
刊 名： 山地科学学报(英文版) SCI 英文刊名： JOURNAL OF MOUNTAIN SCIENCE 年，卷(期)： 2005 2(4) 分类号： P4 关键词： Glacier system climate warming precipitation increasing role