气候变化领域集成服务门户(CCPortal): Modelling the Influence of Vegetation on the Hydrothermal Processes of Frozen Soil in the Qinghai-Tibet Plateau

CCPortal

DOI	10.3390/w15091692
	Modelling the Influence of Vegetation on the Hydrothermal Processes of Frozen Soil in the Qinghai-Tibet Plateau
	Yang, Han; Hong, Xiaofeng; Yuan, Zhe; He, Xiaobo
发表日期	2023
EISSN	2073-4441
卷号	15 期号:9
英文摘要	Climate changes and vegetation conditions are key factors affecting the hydrothermal processes of frozen soil in the Qinghai-Tibet Plateau. Due to the complex relationship between climate factors, vegetation conditions and hydrothermal processes, few studies analyze the individual influences of climate changes and vegetation conditions on hydrothermal processes. Compared to changes in climate, it is easier to control other influential factors of vegetation change, especially human activities. Thus, it is necessary to analyze the possible influence of vegetation change on hydrothermal processes in specific climate conditions; this analysis could provide technical support to inform future human activities on frozen soil. This study uses a vertical hydrothermal process model, the SHAW model, based on meteorological and soil observation data from 2020 to 2021, to model the influence of vegetation changes on the soil temperature and moisture simulations at each layer of frozen soil by changing the key input values that represent vegetation conditions from -100% to 100% at 10% intervals. The results show that: (1) the simulated values have a certain credibility since the simulated soil temperature and moisture are basically consistent with the observed values over time; (2) the performance of soil temperature simulations in the deep layer is better than that in the shallow layer, while the performances of both soil temperature and moisture simulations in the warm season are better than those in the cold season; (3) among the LAI, dry biomass and surface albedo, the LAI is the main vegetation factor that affects the soil temperature and moisture simulations of the SHAW model in the frozen soil; (4) both the soil temperature and moisture simulations show declining trends when the LAI decreases by a large extent (larger than 60%) or increases, and show increasing trends when the LAI decreases by a small extent (smaller than 50%); (5) the warm period and the freeze-thaw alternating period are, respectively, the key periods when the soil temperature and moisture are affected by vegetation changes. The results of this study can provide theoretical supports for the prediction of the hydrothermal processes of frozen soil under a changing vegetation environment in the future.
关键词	vegetation changes soil temperature soil moisture frozen basin Yangtze River source region
英文关键词	CLIMATE-CHANGE; WATER; HEAT; DEGRADATION; MOISTURE; RUNOFF
WOS研究方向	Environmental Sciences ; Water Resources
WOS记录号	WOS:000988079600001
来源期刊	WATER
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283270
作者单位	Yangtze River Water Resources Protection Bureau; Yangtze River Water Resources Protection Bureau; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Yang, Han,Hong, Xiaofeng,Yuan, Zhe,et al. Modelling the Influence of Vegetation on the Hydrothermal Processes of Frozen Soil in the Qinghai-Tibet Plateau[J],2023,15(9).
APA	Yang, Han,Hong, Xiaofeng,Yuan, Zhe,&He, Xiaobo.(2023).Modelling the Influence of Vegetation on the Hydrothermal Processes of Frozen Soil in the Qinghai-Tibet Plateau.WATER,15(9).
MLA	Yang, Han,et al."Modelling the Influence of Vegetation on the Hydrothermal Processes of Frozen Soil in the Qinghai-Tibet Plateau".WATER 15.9(2023).