中国铁道科学2018，Vol.39Issue(1)：1-7,7.DOI:10.3969/j.issn.1001-4632.2018.01.01
青藏铁路工程走廊多年冻土对全球气候变化的响应
Response of Permafrost to Global Climate Change in Engineering Corridor of Qinghai-Tibet Railway
摘要
Abstract
In view of the impact of global climate warming,the annual average temperature along the Qinghai Tibet Railway is rising year by year.Based on the meteorological and ground temperature monitoring data over the years in different regions along the Qinghai-Tibet Railway,the evolution of climatic factors and the response of permafrost to global climate change in the engineering corridor of Qinghai-Tibet Railway are studied.Results show that the temperature in the engineering corridor of the Qinghai Tibet Railway rises by an average of 0.03 ℃.The annual precipitation is mostly between 250～ 450 mm,and the trend of fluctuation increases.The freezing index and melting index are increasing year by year,and the warm winter phenomenon is obvious.The increase rate of ground temperature reaches 0.06 ℃ · a-1,which is 1.34 times of temperature rising rate.From 2007 to 2013,the uplift in the natural upper limit of the permafrost regions along the line accounted for only 9％,while the decline in natural upper limit accounted for 91％.The ground temperatures at different depths of foundation permafrost are increasing.The ground temperature rising rate near the upper limit is generally the maximum.The permafrost degradation is mainly from top to bottom.The permafrost degradation in the north of Tanggula Mountain is more obvious than that in the south of Tanggula Mountain.关键词
青藏铁路/工程走廊/多年冻土/气候变化/响应/升温退化Key words
Qinghai-Tibet Railway/Engineering corridor/Permafrost/Climate change/Response/Temperature rising degradation分类
交通工程引用本文复制引用
杨永鹏,孟进宝,韩龙武,李勇,蔡汉成,朱兆荣..青藏铁路工程走廊多年冻土对全球气候变化的响应[J].中国铁道科学,2018,39(1):1-7,7.基金项目
中国铁路总公司科学技术项目(2016G003-D) （2016G003-D）
科技部科研院所科技开发专项资金项目(2011EG123262) （2011EG123262）
中国中铁股份有限公司科学技术项目(2013-重大-20-1) （2013-重大-20-1）
