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	Modeling hydrothermal transfer processes in permafrost regions of Qinghai-Tibet Plateau in China
	Hu Guojie; Zhao Lin; Li Ren; Wu Tonghua; Wu Xiaodong; Pang Qiangqiang; Xiao Yao; Qiao Yongping; Shi Jianzong
刊名	CHINESE GEOGRAPHICAL SCIENCE
	2015-12-01
卷号	25期号:6页码:713-727
关键词	permafrost coupled heat and mass transfer model (CoupModel) soil temperature soil moisture hydrothermal processes active layer
ISSN号	1002-0063
DOI	10.1007/s11769-015-0733-6
通讯作者	Zhao Lin(linzhao@lzb.ac.cn)
英文摘要	Hydrothermal processes are key components in permafrost dynamics; these processes are integral to global warming. In this study the coupled heat and mass transfer model for (CoupModel) the soil-plant-atmosphere-system is applied in high-altitude permafrost regions and to model hydrothermal transfer processes in freeze-thaw cycles. Measured meteorological forcing and soil and vegetation properties are used in the CoupModel for the period from January 1, 2009 to December 31, 2012 at the Tanggula observation site in the Qinghai-Tibet Plateau. A 24-h time step is used in the model simulation. The results show that the simulated soil temperature and water content, as well as the frozen depth compare well with the measured data. The coefficient of determination (R (2)) is 0.97 for the mean soil temperature and 0.73 for the mean soil water content, respectively. The simulated soil heat flux at a depth of 0-20 cm is also consistent with the monitored data. An analysis is performed on the simulated hydrothermal transfer processes from the deep soil layer to the upper one during the freezing and thawing period. At the beginning of the freezing period, the water in the deep soil layer moves upward to the freezing front and releases heat during the freezing process. When the soil layer is completely frozen, there are no vertical water exchanges between the soil layers, and the heat exchange process is controlled by the vertical soil temperature gradient. During the thawing period, the downward heat process becomes more active due to increased incoming shortwave radiation at the ground surface. The melt water is quickly dissolved in the soil, and the soil water movement only changes in the shallow soil layer. Subsequently, the model was used to provide an evaluation of the potential response of the active layer to different scenarios of initial water content and climate warming at the Tanggula site. The results reveal that the soil water content and the organic layer provide protection against active layer deepening in summer, so climate warming will cause the permafrost active layer to become deeper and permafrost degradation.
收录类别	SCI
WOS关键词	MASS-TRANSFER ; ACTIVE LAYER ; SOIL ; HEAT ; WATER ; TEMPERATURE ; MOISTURE ; BALANCE
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000367015500005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557150
专题	寒区旱区环境与工程研究所
通讯作者	Zhao Lin
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Hu Guojie,Zhao Lin,Li Ren,et al. Modeling hydrothermal transfer processes in permafrost regions of Qinghai-Tibet Plateau in China[J]. CHINESE GEOGRAPHICAL SCIENCE,2015,25(6):713-727.
APA	Hu Guojie.,Zhao Lin.,Li Ren.,Wu Tonghua.,Wu Xiaodong.,...&Shi Jianzong.(2015).Modeling hydrothermal transfer processes in permafrost regions of Qinghai-Tibet Plateau in China.CHINESE GEOGRAPHICAL SCIENCE,25(6),713-727.
MLA	Hu Guojie,et al."Modeling hydrothermal transfer processes in permafrost regions of Qinghai-Tibet Plateau in China".CHINESE GEOGRAPHICAL SCIENCE 25.6(2015):713-727.

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