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DOI	10.1016/j.coldregions.2022.103526
	Characteristic analysis of the spatio-temporal distribution of key variables of the soil freeze-thaw processes over the Qinghai-Tibetan Plateau
	Liu, Wenhui; Wen, Jun; Chen, Jinlei; Wang, Zuoliang; Lu, Xuancheng; Wu, Yueyue; Jiang, Yuqin
通讯作者	Wen, J (通讯作者)，Chengdu Univ Informat Technol, Coll Atmospher Sci, 24 Block 1,Xuefu Rd, Chengdu, Sichuan, Peoples R China.
发表日期	2022
ISSN	0165-232X
EISSN	1872-7441
卷号	197
英文摘要	The soil freeze-thaw phenomenon is one of the most distinguishing peculiarities of the land surface processes over the Qinghai-Tibetan Plateau. By utilizing soil temperature/moisture and air temperature data from the GLDAS-NOAH product, 4 observing networks and 10 meteorological stations over the Qinghai-Tibetan Plateau, the spatio-temporal distribution of the start/end date and the duration of soil freezing and their relationships with air temperature and altitude were investigated with the analytical methods of linear regression model, correlation analysis, sliding t-test and Mann-Kendall test. As a result, the spatial distribution of top-layer soil freeze-thaw processes was characterized by a trend of delaying freezing and advancing thawing from the northwest to the southeast throughout the Qinghai-Tibetan Plateau. Moreover, in the period 1948-2019, the begin date of soil freezing was delayed at a rate of 1.2 d/10a (p-lev < 0.0001, R-2 = 0.40), and the end date of the soil freezing was advanced at a rate of 0.5 d/10a (p-lev = 0.105, R-2 = 0.04). The duration of the soil freeze was shortened with a rate of 2.1 d/10a (p-lev < 0.0001, R-2 = 0.23) in the southern Changtang but 0.4 d/10a (p-lev < 0.0001, R-2 = 0.47) in Qinghai and the southern Tibet Plateau. Additionally, the start date of the soil freeze is to be delayed by 2.8 days (p-lev < 0.0001, R-2 = 0.53), and the end date of the soil freeze is to be advanced by 3.6 (p -lev < 0.0001, R-2 = 0.61) days as the air temperature rises by 1.0 C. In the high cold climatological zone on the Qinghai-Tibetan Plateau, there is a trend toward earlier start date of soil freezing by 9.9 days (p-lev < 0.0001, R-2 = 0.36), and later end date of soil freezing by 14.4 days (p-lev < 0.0001, R-2 = 0.56) as the altitude increases by 1000.0 m. Furthermore, the seasonal variations of soil temperature and moisture were significantly different from typical strong and weak freezing years, which were defined according to the duration of soil freezing period. These results are of great significance for understanding the soil freeze-thaw process and its variation over the Qinghai-Tibetan Plateau.
关键词	SURFACE-ENERGY BUDGET EURASIAN SNOW COVER CLIMATE-CHANGE MOISTURE TEMPERATURE PERMAFROST STATE SATELLITE NETWORK CYCLES
英文关键词	Soil freeze-thaw process; The Qinghai-Tibetan Plateau; Spatio-temporal distribution; Climate change; GLDAS
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:000783133600002
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
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/254317
作者单位	[Liu, Wenhui; Wen, Jun; Wu, Yueyue; Jiang, Yuqin] Chengdu Univ Informat Technol, Coll Atmospher Sci, Key Lab Plateau Atmosphere & Environm, Sichuan Prov, Chengdu 610225, Sichuan, Peoples R China; [Chen, Jinlei] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Lanzhou 730000, Peoples R China; [Wang, Zuoliang] Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change, Cold & Arid Region, Northwest Inst Ecol Environm & Resources, Chinese Acad Sci Room, Lanzhou 730000, Peoples R China; [Lu, Xuancheng] Sun Yat Sen Univ, Coll Marine Sci, Zhuhai 519082, Peoples R China
推荐引用方式 GB/T 7714	Liu, Wenhui,Wen, Jun,Chen, Jinlei,et al. Characteristic analysis of the spatio-temporal distribution of key variables of the soil freeze-thaw processes over the Qinghai-Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2022,197.
APA	Liu, Wenhui.,Wen, Jun.,Chen, Jinlei.,Wang, Zuoliang.,Lu, Xuancheng.,...&Jiang, Yuqin.(2022).Characteristic analysis of the spatio-temporal distribution of key variables of the soil freeze-thaw processes over the Qinghai-Tibetan Plateau.COLD REGIONS SCIENCE AND TECHNOLOGY,197.
MLA	Liu, Wenhui,et al."Characteristic analysis of the spatio-temporal distribution of key variables of the soil freeze-thaw processes over the Qinghai-Tibetan Plateau".COLD REGIONS SCIENCE AND TECHNOLOGY 197(2022).