气候变化领域集成服务门户(CCPortal): Impact of Initial Soil Conditions on Soil Hydrothermal and Surface Energy Fluxes in the Permafrost Region of the Tibetan Plateau

CCPortal

DOI	10.1007/s00376-023-3100-z
	Impact of Initial Soil Conditions on Soil Hydrothermal and Surface Energy Fluxes in the Permafrost Region of the Tibetan Plateau
	Luo, Siqiong; Chen, Zihang; Wang, Jingyuan; Wu, Tonghua; Xiao, Yao; Qiao, Yongping
发表日期	2024
ISSN	0256-1530
EISSN	1861-9533
英文摘要	Accurate initial soil conditions play a crucial role in simulating soil hydrothermal and surface energy fluxes in land surface process modeling. This study emphasized the influence of the initial soil temperature (ST) and soil moisture (SM) conditions on a land surface energy and water simulation in the permafrost region in the Tibetan Plateau (TP) using the Community Land Model version 5.0 (CLM5.0). The results indicate that the default initial schemes for ST and SM in CLM5.0 were simplistic, and inaccurately represented the soil characteristics of permafrost in the TP which led to underestimating ST during the freezing period while overestimating ST and underestimating SLW during the thawing period at the XDT site. Applying the long-term spin-up method to obtain initial soil conditions has only led to limited improvement in simulating soil hydrothermal and surface energy fluxes. The modified initial soil schemes proposed in this study comprehensively incorporate the characteristics of permafrost, which coexists with soil liquid water (SLW), and soil ice (SI) when the ST is below freezing temperature, effectively enhancing the accuracy of the simulated soil hydrothermal and surface energy fluxes. Consequently, the modified initial soil schemes greatly improved upon the results achieved through the long-term spin-up method. Three modified initial soil schemes experiments resulted in a 64%, 88%, and 77% reduction in the average mean bias error (MBE) of ST, and a 13%, 21%, and 19% reduction in the average root-mean-square error (RMSE) of SLW compared to the default simulation results. Also, the average MBE of net radiation was reduced by 7%, 22%, and 21%.
关键词	initial soil conditions soil temperature soil liquid water soil ice surface energy fluxes permafrost
英文关键词	FREEZE-THAW PROCESS; MOISTURE MEMORY; THERMAL-CONDUCTIVITY; MODEL SIMULATIONS; XIZANG PLATEAU; LAND; CLIMATE; TEMPERATURE; PARAMETERIZATION; DATASET
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001142791900002
来源期刊	ADVANCES IN ATMOSPHERIC SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283749
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Luo, Siqiong,Chen, Zihang,Wang, Jingyuan,et al. Impact of Initial Soil Conditions on Soil Hydrothermal and Surface Energy Fluxes in the Permafrost Region of the Tibetan Plateau[J],2024.
APA	Luo, Siqiong,Chen, Zihang,Wang, Jingyuan,Wu, Tonghua,Xiao, Yao,&Qiao, Yongping.(2024).Impact of Initial Soil Conditions on Soil Hydrothermal and Surface Energy Fluxes in the Permafrost Region of the Tibetan Plateau.ADVANCES IN ATMOSPHERIC SCIENCES.
MLA	Luo, Siqiong,et al."Impact of Initial Soil Conditions on Soil Hydrothermal and Surface Energy Fluxes in the Permafrost Region of the Tibetan Plateau".ADVANCES IN ATMOSPHERIC SCIENCES (2024).