干旱区生态环境知识资源中心(Arid): Thermal properties of active layer in permafrost regions with different vegetation types on the Qinghai-Tibetan Plateau

Arid

DOI	10.1007/s00704-019-03008-2
	Thermal properties of active layer in permafrost regions with different vegetation types on the Qinghai-Tibetan Plateau
	Hu, Guojie 1; Zhao, Lin 1,3; Li, Ren 1; Wu, Xiaodong 1; Wu, Tonghua 1; Xie, Changwei 1; Zhu, Xiaofan 1; Hao, Junming 1,2
通讯作者	Hu, Guojie
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
ISSN	0177-798X
EISSN	1434-4483
出版年	2020
卷号	139 期号:3-4 页码:983-993
英文摘要	Active layer plays a key role in regulating the dynamics of hydrothermal processes and ecosystems that are sensitive to the changing climate in permafrost regions. However, little is known about the hydrothermal dynamics during freeze-thaw processes in permafrost regions with different vegetation types on the Qinghai-Tibetan Plateau (QTP). In the present study, the freezing and thawing processes at four sites (QT01, 03, 04, and 05) with different vegetation types on the QTP was analyzed. The results indicated that the impact on the soil water and heat during the summer thawing process was markedly greater than that during the autumn freezing process. Furthermore, the thermal-orbit regression slopes for all sites exhibited a homologous variation as the depth increased, with the slowest attenuation for the meadow sites (QT01 and QT03) and a slightly faster attenuation for the desert steppe site (QT05). The air and ground surface temperatures were similar in winter, but the ground surface temperature was significantly higher than the air temperature in summer in the radiation-rich environment at all sites on the QTP. The results also indicated that the n-factors were between 0.36 and 0.55 during the thawing season, and the annual mean temperature near the permafrost table was between - 1.26 and - 1.84 degrees C. In the alpine desert steppe region, the thermal conditions exhibited to show a warming trend, with a current permafrost table temperature of - 0.22 degrees C. The annual changing amplitude of the ground temperature at the permafrost table was different for different vegetation types.
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000499198700002
WOS关键词	NEAR-SURFACE PERMAFROST ; SOIL-TEMPERATURE ; CLIMATE ; REGIME ; SITES ; AIR ; KARKEVAGGE ; DYNAMICS ; IMPACTS ; ALASKA
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
EI主题词	2019-11-28
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311007
作者单位	1.Chinese Acad Sci, Cryosphere Res Stn Qinghai Xizang Plateau, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Donggang West Rd 320, Lanzhou 730000, Gansu, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Jiangsu, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hu, Guojie,Zhao, Lin,Li, Ren,et al. Thermal properties of active layer in permafrost regions with different vegetation types on the Qinghai-Tibetan Plateau[J]. 南京信息工程大学,2020,139(3-4):983-993.
APA	Hu, Guojie.,Zhao, Lin.,Li, Ren.,Wu, Xiaodong.,Wu, Tonghua.,...&Hao, Junming.(2020).Thermal properties of active layer in permafrost regions with different vegetation types on the Qinghai-Tibetan Plateau.THEORETICAL AND APPLIED CLIMATOLOGY,139(3-4),983-993.
MLA	Hu, Guojie,et al."Thermal properties of active layer in permafrost regions with different vegetation types on the Qinghai-Tibetan Plateau".THEORETICAL AND APPLIED CLIMATOLOGY 139.3-4(2020):983-993.