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DOI	10.1016/j.scitotenv.2021.148358
	Spatiotemporal variations and regional differences in air temperature in the permafrost regions in the Northern Hemisphere during 1980-2018
	Hu, Guojie; Zhao, Lin; Wu, Tonghua; Wu, Xiaodong; Park, Hotaek; Fedorov, Alexander; Wei, Yufei; Li, Ren; Zhu, Xiaofan; Sun, Zhe; Ni, Jie; Zou, Defu
通讯作者	Wu, TH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Peoples R China. ; Zhao, L (通讯作者)，Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China.
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	791
英文摘要	Surface air temperature is an important factor for the permafrost thermal state in the Northern Hemisphere. It is therefore necessary to understand the variations and regional differences in air temperature to determine the interactions between permafrost degradation and climate change. In this study, we used observational data from the National Centers for Environmental Information, the China Meteorological Administration, and the World Data Centre for Meteorology to quantitatively analyze the variations and regional differences in air temperature from 1980 to 2018. The results demonstrated that the annual mean air temperatures were low in continuous permafrost regions and high in sporadic and isolated permafrost regions, with a significant warming rate of 0.371 +/- 0.086 degrees C/decade. Air temperatures warmed the slowest during the winter and fastest during the spring, and no warming hiatus was observed in the permafrost regions of the Northern Hemisphere. The spatial patterns of freezing degree-days (FDDs) and thawing degree-days (TDDs) had different spatial characteristics. The decreasing rate of FDDs was -6.97 degrees Cmiddotdays/year, while the increasing rate of TDDs was 6.4 degrees Cmiddotdays/year. The air temperatures and warming trends had largely regional differences with respect to high latitude, transitional, and high altitude permafrost regions. Air temperature and its warming trend was the highest in high altitude regions. In addition, air temperature warming trends gradually decreased from the continuous permafrost zone to the island permafrost zone. The FDDs had a significant decreasing trend from the continuous permafrost zone to the island permafrost zone, whereas TDDs exhibited the opposite trend. The results indicate that the air temperature warming rate in the permafrost regions was approximately 2.0 times that of the global warming rate, and 1.3 times the global land warming rate from 1980 to 2018. These findings offer a perspective on the differences in permafrost and its thermal state across different regions under climate change. (c) 2021 Elsevier B.V. All rights reserved.
关键词	CLIMATE-CHANGE THERMAL STATE ARCTIC AMPLIFICATION SOIL-TEMPERATURE ACTIVE LAYER POLAR AMPLIFICATION TIBETAN PLATEAU VARIABILITY DYNAMICS TREND
英文关键词	Permafrost; Air temperature; Climate change; Observation; Northern Hemisphere
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000686012800010
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/254247
作者单位	[Hu, Guojie; Wu, Tonghua; Wu, Xiaodong; Park, Hotaek; Li, Ren; Zhu, Xiaofan; Sun, Zhe; Ni, Jie; Zou, Defu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Peoples R China; [Zhao, Lin] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China; [Park, Hotaek] JAMSTEC, Inst Arct Climate & Environm Res, Yokosuka, Kanagawa, Japan; [Fedorov, Alexander] Russian Acad Sci, Melnikov Permafrost Inst, Siberian Branch, Yakutsk, Russia; [Wei, Yufei] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Peoples R China; [Wu, Tonghua] Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China; [Wu, Tonghua] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hu, Guojie,Zhao, Lin,Wu, Tonghua,et al. Spatiotemporal variations and regional differences in air temperature in the permafrost regions in the Northern Hemisphere during 1980-2018[J]. 中国科学院西北生态环境资源研究院,2021,791.
APA	Hu, Guojie.,Zhao, Lin.,Wu, Tonghua.,Wu, Xiaodong.,Park, Hotaek.,...&Zou, Defu.(2021).Spatiotemporal variations and regional differences in air temperature in the permafrost regions in the Northern Hemisphere during 1980-2018.SCIENCE OF THE TOTAL ENVIRONMENT,791.
MLA	Hu, Guojie,et al."Spatiotemporal variations and regional differences in air temperature in the permafrost regions in the Northern Hemisphere during 1980-2018".SCIENCE OF THE TOTAL ENVIRONMENT 791(2021).