气候变化领域集成服务门户(CCPortal): Dynamics of freezing/thawing indices and frozen ground from 1900 to 2017 in the upper Brahmaputra River Basin, Tibetan Plateau

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DOI	10.1016/j.accre.2020.10.003
	Dynamics of freezing/thawing indices and frozen ground from 1900 to 2017 in the upper Brahmaputra River Basin, Tibetan Plateau
	Liu Lei; Luo Dong-Liang; Wang Lei; Huang Ya-Dong; Chen Fang-Fang
通讯作者	Luo, DL (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggang West Rd, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1674-9278
起始页码	6
结束页码	17
卷号	12 期号:1
英文摘要	Dynamics of the frozen ground are key to understand the changes of eco-environment in cold regions, especially for areas with limited field observations. In this study, we analyzed the spatial and temporal variations of the ground surface freezing and thawing indices from 1900 to 2017 for the upper Brahmaputra River (also called the Yarlung Zangbo River in China) Basin (UBRB), southwestern Tibetan Plateau, with the air freezing and thawing indices using the University of Delaware (UDEL) monthly gridded air temperature dataset. The abrupt change years for air freezing index (AFI) and ground surface freezing index (GFI) were detected in 1999 and 2002, respectively, and for both air thawing index (ATI) and ground surface thawing index (GTI) were 2009. With the air temperature rising at a rate of 0.006 degrees C per year over 1900-2017, the AFI and GFI decreased at a rate of -0.1 degrees C d per year, while the ATI and GTI increased at rates of 0.3 and 0.5 degrees C d per year before the abrupt change year, respectively; all changing trends of freezing/thawing indices increased after the abrupt year, which was -2.9, -0.8, 7.3, and 21.7 degrees C d per year for the AFI, GFI, ATI, and GTI, respectively. We utilized the surface frost number model to obtain the dynamics of the frozen ground over the UBRB. When the empirical coefficient of E was assigned to 1.2, the simulated frozen ground occupied about 53.2% of the whole UBRB in the 1990s, which agreed well with the existing permafrost map published in 1996. The area of frozen ground accounts for 51.5%-54.5% of the UBRB during 1900-2017. This result may facilitate further studies of the multi-interactions among the frozen ground and relevant eco-environment, such as the air-ground surface energy exchange, hydrological cycles, and changes of the active layer thickness over the UBRB.
关键词	CLIMATE-CHANGE PERMAFROST DISTRIBUTION SURFACE TEMPERATURES VARIABILITY CHINA AIR MAP
英文关键词	Upper Brahmaputra River Basin; Tibetan Plateau; Surface frost number model; Permafrost distribution; Dynamics of frozen ground
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000629700700002
来源期刊	ADVANCES IN CLIMATE CHANGE RESEARCH
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/253925
作者单位	[Liu Lei; Luo Dong-Liang; Huang Ya-Dong; Chen Fang-Fang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggang West Rd, Lanzhou 730000, Peoples R China; [Liu Lei; Wang Lei; Huang Ya-Dong; Chen Fang-Fang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang Lei] Chinese Acad Sci, Inst Tibetan Plateau Res, 16 Cuilin Rd, Beijing 100101, Peoples R China; [Wang Lei] CAS Ctr Excellence Tibetan Plateau Earth Sci, 16 Cuilin Rd, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Liu Lei,Luo Dong-Liang,Wang Lei,et al. Dynamics of freezing/thawing indices and frozen ground from 1900 to 2017 in the upper Brahmaputra River Basin, Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,12(1).
APA	Liu Lei,Luo Dong-Liang,Wang Lei,Huang Ya-Dong,&Chen Fang-Fang.(2021).Dynamics of freezing/thawing indices and frozen ground from 1900 to 2017 in the upper Brahmaputra River Basin, Tibetan Plateau.ADVANCES IN CLIMATE CHANGE RESEARCH,12(1).
MLA	Liu Lei,et al."Dynamics of freezing/thawing indices and frozen ground from 1900 to 2017 in the upper Brahmaputra River Basin, Tibetan Plateau".ADVANCES IN CLIMATE CHANGE RESEARCH 12.1(2021).