气候变化领域集成服务门户(CCPortal): Evaluation of CLM5.0 for simulating surface energy budget and soil hydrothermal regime in permafrost regions of the Qinghai-Tibet Plateau

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DOI	10.1016/j.agrformet.2023.109380
	Evaluation of CLM5.0 for simulating surface energy budget and soil hydrothermal regime in permafrost regions of the Qinghai-Tibet Plateau
	Ma, Junjie; Li, Ren; Liu, Hongchao; Huang, Zhongwei; Wu, Tonghua; Wu, Xiaodong; Zhao, Lin; Hu, Guojie; Xiao, Yao; Jiao, Yongliang; Liu, Wenhao; Wang, Shenning; Shi, Jianzong; Qiao, Yongping
发表日期	2023
ISSN	0168-1923
EISSN	1873-2240
卷号	332
英文摘要	Surface energy budget and soil hydrothermal regime are crucial for understanding the interactions between the atmosphere and land surface. However, large uncertainties in current land surface process models exist, espe-cially for the permafrost regions in the Qinghai-Tibet Plateau. In this study, observed soil temperature, moisture, and surface energy fluxes at four sites in permafrost regions are chosen to evaluate the performance of CLM5.0. Furthermore, the soil property data, different thermal roughness length schemes, and dry surface layer (DSL) scheme are investigated. The results show that the soil property data is important for CLM5.0. The default scheme in CLM5.0 yields large errors for surface energy fluxes. The combination of the thermal roughness length and DSL scheme significantly improved the simulation of surface energy fluxes, especially for latent heat flux. The optimization of DSL scheme significantly improved soil temperature simulation and decreased the RMSE from 1.95 degrees C, 2.07 degrees C, 2.02 degrees C, and 2.95 degrees C to 1.34 degrees C, 1.35 degrees C, 1.35 degrees C and 2.29 degrees C in TGL site, respectively. The combination of the thermal roughness length and DSL scheme performed the best in shallow soil moisture, decreasing the RMSE from 0.136 m3 m- 3 to 0.049 m3 m- 3 in the XDT site but slightly enhancing the errors in middle soil. The interactions between surface energy and soil hydrothermal regime also discussed. However, the thermal roughness length and the DSL schemes are highly dependent on the condition of the underlying surface. Different schemes should be selected for different regions.
关键词	Surface energy fluxes Soil temperature and moisture CLM Thermal roughness length Dry surface layer
英文关键词	COMMUNITY LAND MODEL; FREEZE-THAW PROCESSES; ACTIVE LAYER; HEAT FLUXES; SKIN TEMPERATURE; PARAMETERIZATION; ROUGHNESS; CLIMATE; BALANCE; IMPACT
WOS研究方向	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000949793000001
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283078
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Lanzhou University; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Ma, Junjie,Li, Ren,Liu, Hongchao,et al. Evaluation of CLM5.0 for simulating surface energy budget and soil hydrothermal regime in permafrost regions of the Qinghai-Tibet Plateau[J],2023,332.
APA	Ma, Junjie.,Li, Ren.,Liu, Hongchao.,Huang, Zhongwei.,Wu, Tonghua.,...&Qiao, Yongping.(2023).Evaluation of CLM5.0 for simulating surface energy budget and soil hydrothermal regime in permafrost regions of the Qinghai-Tibet Plateau.AGRICULTURAL AND FOREST METEOROLOGY,332.
MLA	Ma, Junjie,et al."Evaluation of CLM5.0 for simulating surface energy budget and soil hydrothermal regime in permafrost regions of the Qinghai-Tibet Plateau".AGRICULTURAL AND FOREST METEOROLOGY 332(2023).