气候变化领域集成服务门户(CCPortal): Permafrost extent and active layer thickness variation in the Northern Hemisphere from 1969 to 2018

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DOI	10.1016/j.scitotenv.2021.150182
	Permafrost extent and active layer thickness variation in the Northern Hemisphere from 1969 to 2018
	Li, Guanji; Zhang, Mingyi; Pei, Wansheng; Melnikov, Andrey; Khristoforov, Ivan; Li, Renwei; Yu, Fan
发表日期	2022
ISSN	0048-9697
EISSN	1879-1026
卷号	804
英文摘要	Understanding the evolution of the permafrost extent and active layer thickness (ALT) in the Northern Hemisphere (NH) is critical for global carbon flux simulation, climate change prediction, and risk assessments in engineering. The temporal variation characteristics of the permafrost extent and ALT for the NH have not been studied. We used the Kudryavtsev method, integrating a 0.5 degrees x 05 degrees spatial resolution of air temperature, soil texture, snow depth, vegetation type, volume moisture content, and organic content to simulate the distribution of permafrost extent and ALT in the NH from 1969 to 2018. The results indicated that permafrost extent decreased from 23.25 x 10(6) km(2) (average from 1969 to 1973) to 21.64 x 10(6) km(2 )(average from 2014 to 2018), with a linear rate of -0.023 x 10(6) km(2)/a. Siberia had the highest degradation rate of 0.014 x 10(6) km(2)/a , followed by Alaska, the Mongolian Plateau, the Qinghai-Tibet Plateau, Northern Canada, and Greenland, with linear rates of -0.012 x 10(6), -0.005 x 10(6), -0.004 x 10(6), -0.0014 x 10(6), and - 0.0004x 10(6) km(2)/a , respectively. The average ALT in the NH increased at a linear rate of 0.0086 m/a. Alaska and the Mongolian Plateau had the highest thickening rate of 0.024 m/a, followed by the Qinghai-Tibet Plateau, Siberia, Northern Canada, and Greenland, which had linear rates of 0.009, 0.008, 0.0072, and 0.003 m/a, respectively. The uncertainty of the results could be attributed to the inaccurate forcing data and limitations of the Kudryavtsev model. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Northern hemisphere; Climate change; Permafrost degradation; Active layer thickness
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS关键词	CLIMATE-CHANGE ; THERMAL STATE ; DEGRADATION ; SCENARIOS ; DYNAMICS ; CANADA ; SYSTEM
WOS记录号	WOS:000701742400004
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/240150
作者单位	[Li, Guanji; Zhang, Mingyi; Pei, Wansheng; Li, Renwei; Yu, Fan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Li, Guanji; Zhang, Mingyi; Pei, Wansheng; Li, Renwei; Yu, Fan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Melnikov, Andrey; Khristoforov, Ivan] Russian Acad Sci, Melnikov Permafrost Inst, Siberian Branch, Yakutsk 677010, Russia
推荐引用方式 GB/T 7714	Li, Guanji,Zhang, Mingyi,Pei, Wansheng,et al. Permafrost extent and active layer thickness variation in the Northern Hemisphere from 1969 to 2018[J]. 中国科学院西北生态环境资源研究院,2022,804.
APA	Li, Guanji.,Zhang, Mingyi.,Pei, Wansheng.,Melnikov, Andrey.,Khristoforov, Ivan.,...&Yu, Fan.(2022).Permafrost extent and active layer thickness variation in the Northern Hemisphere from 1969 to 2018.SCIENCE OF THE TOTAL ENVIRONMENT,804.
MLA	Li, Guanji,et al."Permafrost extent and active layer thickness variation in the Northern Hemisphere from 1969 to 2018".SCIENCE OF THE TOTAL ENVIRONMENT 804(2022).