气候变化领域集成服务门户(CCPortal): Permafrost degradation along the Qinghai-Tibet Highway from 1995 to 2020

CCPortal

DOI	10.1016/j.accre.2023.04.006
	Permafrost degradation along the Qinghai-Tibet Highway from 1995 to 2020
	Sun, Zhi-Zhong; Ma, Wei; Wu, Gui-Long; Liu, Yong-Zhi; Li, Guo-Yu
发表日期	2023
ISSN	1674-9278
起始页码	248
结束页码	254
卷号	14 期号:2
英文摘要	Permafrost degradation significantly affects engineering infrastructure, hydrologic processes, landscape and geomorphic processes, eco-systems and carbon cycling in cold regions. The permafrost degradation along the Qinghai-Tibet Highway (QTH) on the Qinghai-Tibet Plateau, China, introduces an adverse effect on the deformation of the highway subgrade. At present, observation of a long series of ground temperatures is lacking. From 1995 to 2020, a monitoring system of ground temperature in 10 natural sites along QTH was built and maintained. Ground temperatures at different depths were continuously observed semi-monthly. In this study, permafrost changes along QTH were quan-titatively investigated based on these records. The main results showed that both the permafrost table depth (PTD) and ground temperature at different depths exhibited an increasing trend from 1995 to 2020 with widespread spatiotemporal differences. The higher the annual mean and range of PTD were, the higher the increase rate in PTD. The increase rates in PTDs in the warm permafrost regions were 6.18 cm per year larger than those in the cold ones. Overall, the increase rates in ground temperature decreased with the increase in depth at each site. At different depths, the smaller the mean annual ground temperature (MAGT) was, the larger the increase rate in the permafrost temperatures. The larger the range of ground temperatures was, the bigger the increase rate in the permafrost temperatures. At a depth of 6.0 m, the increase rate in the ground temperature in cold permafrost regions was twice that in warm permafrost regions. Information on the magnitudes and differences in permafrost degradation along QTH is necessary for the design of effective adaption strategies for engineering construction and environment protection in permafrost regions under climatic warming.
关键词	Permafrost table depth Permafrost temperature Permafrost degradation Qinghai-Tibet Highway Qinghai-Tibet Plateau
英文关键词	THERMAL STATE; ACTIVE LAYER; CLIMATE
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001014422500001
来源期刊	ADVANCES IN CLIMATE CHANGE RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282583
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; Chinese Academy of Sciences; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Sun, Zhi-Zhong,Ma, Wei,Wu, Gui-Long,et al. Permafrost degradation along the Qinghai-Tibet Highway from 1995 to 2020[J],2023,14(2).
APA	Sun, Zhi-Zhong,Ma, Wei,Wu, Gui-Long,Liu, Yong-Zhi,&Li, Guo-Yu.(2023).Permafrost degradation along the Qinghai-Tibet Highway from 1995 to 2020.ADVANCES IN CLIMATE CHANGE RESEARCH,14(2).
MLA	Sun, Zhi-Zhong,et al."Permafrost degradation along the Qinghai-Tibet Highway from 1995 to 2020".ADVANCES IN CLIMATE CHANGE RESEARCH 14.2(2023).