The Impact of Climatic Changes on Permafrost Degradation in Source Region of the Yangtze River

摘要：

During the past fifty years,permafrost in source region of the Yangtze River (SRYR) has been degrading at a rapid rate due to the influence of increasing human activities and climatic changes.As we all know,the population density in SRYR is not more than one person per square kilometer,so impact of human activities on permafrost is far less than that of climatic changes.Increase of air temperature has resulted in an increase in ground temperature,deepening of permafrost table and shrinkage of permafrost area.In addition to air temperature,many other meteorological factors especially sunshine duration and annual snow cover also have a direct effect on permafrost temperature and can modify the effect of changes in air temperature.In this paper,we analyzed the status of permafrost degradation and the variations of air temperature,sunshine duration and snow cover,pointed out the relationship between permafrost degradation and climatic changes.

关键词： Source region of the Yangtze River permafrost degradation climatic changes

作者: Jin Chen Dongqing Li Qingzhou Meng Guowucai Yong

作者单位: SKLFSE,Cold and Arid Regions Environmental and Engineering Research Institute,CAS,320 West Donggang Road,Lanzhou,Gansu Province,China 730000

会议类型: 国际会议

会议名称: 第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-06-28（万方平台首次上网日期，不代表论文的发表时间）