气候变化领域集成服务门户(CCPortal): The spatiotemporal variations of freezing index and its relationship with permafrost degradation over the Qinghai-Tibet Plateau from 1977 to 2016

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DOI	10.1007/s00704-023-04672-1
	The spatiotemporal variations of freezing index and its relationship with permafrost degradation over the Qinghai-Tibet Plateau from 1977 to 2016
	Li, Ren; Ma, Junjie; Wu, Tonghua; Wang, Qinxue; Wu, Xiaodong; Zhao, Lin; Wang, Shenning; Hu, Guojie; Liu, Wenhao; Jiao, Yongliang; Yao, Jimin; Xiao, Yao; Zhu, Xiaofan; Shi, Jianzong; Qiao, Yongping
发表日期	2023
ISSN	0177-798X
EISSN	1434-4483
英文摘要	The freezing index (FI) is one of the most important indicators that shows the variation of permafrost. However, the relationship between climate change and the thermal conditions of permafrost is not understood well. This study analyzed the variation of FI based on 5-cm soil temperature derived from 74 meteorological stations from 1977 to 2016 on the Qinghai-Tibet Plateau (QTP). Furthermore, the factors affecting the FI variation and its relationship with permafrost degradation were also discussed. The results showed that FI was much smaller in the interior than other areas of the QTP, and it increased at a rate of 53.0 degrees C d/10a during the 40 years. FI in the main body of the QTP was relatively stable than surrounding areas; it was more stable in the northern part than in the southern part. On average, the FI variation coefficient was larger than 10%, indicating the large fluctuation of FI during the 40 years. FI decreased with the increasing altitude; it was more sensitive to the altitude in the south of 33 degrees N than in the north. The variation of FI was closely related to the maximum freezing depth (MFD) and the active layer thickness (ALT). It was observed that MFD decreased and ALT increased by approximately 1.4 cm and 1.6 cm, respectively, with each 10.0 degrees C d increase in FI. The results exhibited the thermal condition variation of the permafrost in QTP and revealed a degrading trend of the permafrost.
关键词	Qinghai-Tibet Plateau Freezing index Coefficient of variation Active layer thickness Maximum freezing depth
英文关键词	CLIMATE-CHANGE; ACTIVE-LAYER; TEMPERATURE; REGIONS; THAW
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001075534800001
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282832
作者单位	Chinese Academy of Sciences; Nanyang Normal College; Southern Marine Science & Engineering Guangdong Laboratory; Southern Marine Science & Engineering Guangdong Laboratory (Guangzhou); National Institute for Environmental Studies - Japan; Nanjing University of Information Science & Technology; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Li, Ren,Ma, Junjie,Wu, Tonghua,et al. The spatiotemporal variations of freezing index and its relationship with permafrost degradation over the Qinghai-Tibet Plateau from 1977 to 2016[J],2023.
APA	Li, Ren.,Ma, Junjie.,Wu, Tonghua.,Wang, Qinxue.,Wu, Xiaodong.,...&Qiao, Yongping.(2023).The spatiotemporal variations of freezing index and its relationship with permafrost degradation over the Qinghai-Tibet Plateau from 1977 to 2016.THEORETICAL AND APPLIED CLIMATOLOGY.
MLA	Li, Ren,et al."The spatiotemporal variations of freezing index and its relationship with permafrost degradation over the Qinghai-Tibet Plateau from 1977 to 2016".THEORETICAL AND APPLIED CLIMATOLOGY (2023).