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中国沙漠  2014 

青藏高原风沙堆积对多年冻土影响研究进展

DOI: 10.7522/j.issn.1000-694X.2013.00359

Keywords: 沙漠化,多年冻土,风沙堆积,青藏高原

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Abstract:

受全球气候变化和人类活动影响,青藏高原上的土地沙漠化正呈现加速发展态势。沙漠化产生的风沙堆积势必改变地表辐射和能量平衡状况,对较为敏感和脆弱的多年冻土环境造成影响,并可能影响青藏铁路路基的稳定性。因此,研究积沙对多年冻土的影响对于高原沙害防治、多年冻土保护和道路工程建设都具有重要的理论及现实意义。目前,前人已在青藏高原地表能量平衡研究方面取得了一些成果,并开始关注积沙对冻土温度影响问题。然而,由于已有观测资料的连续性、同步性和可比性等局限,对积沙地表辐射和能量平衡方面的研究还比较薄弱,积沙对冻土温度过程影响的研究结果尚不一致,而积沙对路基影响的问题也亟待开展研究。为此,本文提出了加强定位观测、开展室内低温实验以及数值模拟等建议,以期对今后的深入研究起到抛砖引玉作用。

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