气候变化领域集成服务门户(CCPortal): Evaluation of soil thermal conductivity schemes incorporated into CLM5.0 in permafrost regions on the Tibetan Plateau

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DOI	10.1016/j.geoderma.2021.115330
	Evaluation of soil thermal conductivity schemes incorporated into CLM5.0 in permafrost regions on the Tibetan Plateau
	Yang, Shuhua; Li, Ren; Wu, Tonghua; Wu, Xiaodong; Zhao, Lin; Hu, Guojie; Zhu, Xiaofan; Du, Yizhen; Xiao, Yao; Zhang, Yuxin; Ma, Junjie; Du, Erji; Shi, Jianzong; Qiao, Yongping
通讯作者	Li, R (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0016-7061
EISSN	1872-6259
卷号	401
英文摘要	Soil thermal conductivity (STC) is essential parameter for revealing thermodynamic changes and projecting changes in soil thermal regimes. However, the incorporation of different STC schemes into land surface process models (LSMs) can afford large errors. Thus, to accurately simulate soil thermal regimes in permafrost regions, a suitable STC scheme in LSMs is important. Herein, we selected nine normalized STC schemes and evaluated their performance in simulating STC and soil temperatures with in situ measurements in permafrost regions on the Tibetan Plateau (TP). These schemes were divided into three categories and incorporated into the latest version of the Community Land Model (CLM5.0). The results showed that the category comprising minerals, soil organic matter, and gravel soil afforded better performance at most sites than the other categories. The Balland and Arp (BA2005), Chadburn (C2015), and Bao (B2016) schemes had better performances in their affiliated categories, respectively. The BA2005 scheme ranked the best among the selected schemes with an average root-mean-square error decreased of 56.2% and 15.0% in simulating STC and soil temperatures compared to the default scheme, respectively. Additionally, the different schemes yielded a maximum difference of 2.69 W.m(-1) K-1 and 2.55 degrees C in simulating STC and soil temperature, respectively. Possible causes affecting the results were also investigated. The results indicated that soil moisture is a determinant: slight changes in soil moisture may cause large changes in thermal processes. However, the CLM5.0 yields large uncertainties of soil moisture. In addition, soil properties, atmospheric forcing data, and model structures also yielded errors in the simulated results. Note that no single STC scheme can be applied to all regions with satisfactory results. Therefore, multiple schemes need to be employed depending on their suitability in different regions. And more studies should focus on the accuracy of the hydraulic processes, especially soil hydraulic conductivity, unfrozen water, and snow processes.
关键词	COMMUNITY LAND MODEL WATER-CONTENT FROZEN SOIL NUMERICAL-MODEL SURFACE PARAMETERIZATION MOISTURE SIMULATIONS TEMPERATURE DYNAMICS
英文关键词	Soil thermal conductivity; Soil temperature; CLM; Permafrost; Tibetan Plateau
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000688573200010
来源期刊	GEODERMA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253898
作者单位	[Yang, Shuhua; Li, Ren; Wu, Tonghua; Wu, Xiaodong; Hu, Guojie; Zhu, Xiaofan; Du, Yizhen; Xiao, Yao; Zhang, Yuxin; Ma, Junjie; Du, Erji; Shi, Jianzong; Qiao, Yongping] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Gansu, Peoples R China; [Yang, Shuhua; Du, Yizhen; Zhang, Yuxin; Ma, Junjie; Du, Erji] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wu, Tonghua] Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China; [Zhao, Lin] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shuhua,Li, Ren,Wu, Tonghua,et al. Evaluation of soil thermal conductivity schemes incorporated into CLM5.0 in permafrost regions on the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,401.
APA	Yang, Shuhua.,Li, Ren.,Wu, Tonghua.,Wu, Xiaodong.,Zhao, Lin.,...&Qiao, Yongping.(2021).Evaluation of soil thermal conductivity schemes incorporated into CLM5.0 in permafrost regions on the Tibetan Plateau.GEODERMA,401.
MLA	Yang, Shuhua,et al."Evaluation of soil thermal conductivity schemes incorporated into CLM5.0 in permafrost regions on the Tibetan Plateau".GEODERMA 401(2021).