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冰川冻土  2014 

青藏铁路沿线多年冻土分布特征及其对环境变化的响应

DOI: 10.7522/j.issn.1000-0240.2014.0093, PP. 772-781

Keywords: 青藏铁路,多年冻土,分布特征,环境变化,响应

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Abstract:

针对青藏高原特殊的自然气候条件,按照地形、地貌把青藏铁路沿线多年冻土分为15个区段,并分别介绍了各个区段多年冻土特征.结果表明在外界环境变化,包括全球气候变暖及工程活动的双重效应下,青藏铁路沿线多年冻土及其存在状态发生了极大变化,这些变化主要包括年平均气温升高、多年冻土退化、热融灾害增加、寒区工程病害不断加剧等.多年冻土及其存在状态发生变化不但导致生态环境恶化,而且对青藏铁路沿寒区工程的安全运营、维护及发展提出新的挑战.

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