1966-2004年青藏铁路沿线年冻结与融化指数的变化趋势(英文)

编号 zgly0001586743

文献类型 期刊论文

文献题名 1966-2004年青藏铁路沿线年冻结与融化指数的变化趋势(英文)

作者 姜逢清  胡汝骥  李珍 

作者单位 XinjiangInstituteofEcologyandGeographyCAS  XinjiangInstituteofEcologyandGeographyCAS  Urumqi830011China 

母体文献 Journal of Geographical Sciences 

年卷期 2008年01期

年份 2008 

分类号 U213.14  P49 

关键词 freezingandthawingindex  globalwarming  trends  Qinghai-XizangRailway 

文摘内容 Annual freezing and thawing index of 7 meteorological stations along the Qing- hai-Xizang Railway were calculated based on daily maximum and minimum temperature records for 1966-2004. Trends of annual freezing and thawing index were analyzed using the Mann-Kendall test and a simple linear regression method. The results show that: 1) The mean annual freezing indices range from 95 to 2300℃·d and the mean annual thawing indi- ces range from 630 to 3250℃·d. The mean annual freezing index of the 7 stations exhibited decreasing trends with decreasing rate of -16.6– -59.1℃·d /10a. The mean annual thawing index of these 7 stations showed increasing trends with the related decreasing rate is 19.83–45.6℃·d /10a. 2) The MK trend test indicated the significant decreasing trends (significant at < 0.05 significant level) in the annual freezing index for most stations except for Golmud. The significant increasing trends can be observed in the annual thawing index for 4 stations except Golmud and Tuotuohe. Golmud was the only station with no trends in both annual freezing and annual thawing index.