气候变化领域集成服务门户(CCPortal): Thermal impacts of engineering activities and vegetation layer on permafrost in different alpine ecosystems of the Qinghai-Tibet Plateau, China

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DOI	10.5194/tc-10-1695-2016
	Thermal impacts of engineering activities and vegetation layer on permafrost in different alpine ecosystems of the Qinghai-Tibet Plateau, China
	Wu, Qingbai; Zhang, Zhongqiong; Gao, Siru; Ma, Wei
发表日期	2016
ISSN	1994-0416
EISSN	1994-0424
起始页码	1695
结束页码	1706
卷号	10 期号:4
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.
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS关键词	ACTIVE-LAYER ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; NORTHERN ALASKA ; HIGHWAY ; RAILWAY ; REGIME ; DEGRADATION ; EMBANKMENT ; REGIONS
WOS记录号	WOS:000381218000013
来源期刊	CRYOSPHERE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240208
作者单位	[Wu, Qingbai; Zhang, Zhongqiong; Gao, Siru; Ma, Wei] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China; [Wu, Qingbai; Ma, Wei] 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]. 中国科学院西北生态环境资源研究院,2016,10(4).
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).
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).