中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Thermal impacts of engineering activities and vegetation layer on permafrost in different alpine ecosystems of the Qinghai-Tibet Plateau, China

文献类型:期刊论文

作者Wu, Qingbai1,2; Zhang, Zhongqiong1; Gao, Siru1; Ma, Wei1,2
刊名CRYOSPHERE
出版日期2016
卷号10期号:4页码:1695-1706
ISSN号1994-0416
DOI10.5194/tc-10-1695-2016
通讯作者Wu, Qingbai(qbwu@lzb.ac.cn)
英文摘要Climate warming and engineering activities have various impacts on the thermal regime of permafrost in alpine ecosystems of the Qinghai-Tibet Plateau. Using recent observations of permafrost thermal regimes along the Qinghai-Tibet highway and railway, the changes of such regimes beneath embankments constructed in alpine meadows and steppes are studied. The results show that alpine meadows on the Qinghai-Tibet Plateau can have a controlling role among engineering construction effects on permafrost beneath embankments. As before railway construction, the artificial permafrost table (APT) beneath embankments is not only affected by climate change and engineering activities but is also controlled by alpine ecosystems. However, the change rate of APT is not dependent on ecosystem type, which is predominantly affected by climate change and engineering activities. Instead, the rate is mainly related to cooling effects of railway ballast and heat absorption effects of asphalt pavement. No large difference between alpine and steppe can be identified regarding the variation of soil temperature beneath embankments, but this difference is readily identified in the variation of mean annual soil temperature with depth. The vegetation layer in alpine meadows has an insulation role among engineering activity effects on permafrost beneath embankments, but this insulation gradually disappears because the layer decays and compresses over time. On the whole, this layer is advantageous for alleviating permafrost temperature rise in the short term, but its effect gradually weakens in the long term.
收录类别SCI
WOS关键词ACTIVE-LAYER ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; NORTHERN ALASKA ; RAILWAY ; REGIONS ; HIGHWAY ; REGIME ; DEGRADATION ; EMBANKMENT
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
语种英语
WOS记录号WOS:000381218000013
出版者COPERNICUS GESELLSCHAFT MBH
URI标识http://www.irgrid.ac.cn/handle/1471x/2557466
专题寒区旱区环境与工程研究所
通讯作者Wu, Qingbai
作者单位1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Beiluhe Observat Stn Frozen Soil Environm & Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714
Wu, Qingbai,Zhang, Zhongqiong,Gao, Siru,et al. Thermal impacts of engineering activities and vegetation layer on permafrost in different alpine ecosystems of the Qinghai-Tibet Plateau, China[J]. CRYOSPHERE,2016,10(4):1695-1706.
APA Wu, Qingbai,Zhang, Zhongqiong,Gao, Siru,&Ma, Wei.(2016).Thermal impacts of engineering activities and vegetation layer on permafrost in different alpine ecosystems of the Qinghai-Tibet Plateau, China.CRYOSPHERE,10(4),1695-1706.
MLA Wu, Qingbai,et al."Thermal impacts of engineering activities and vegetation layer on permafrost in different alpine ecosystems of the Qinghai-Tibet Plateau, China".CRYOSPHERE 10.4(2016):1695-1706.

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来源:寒区旱区环境与工程研究所

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