气候变化领域集成服务门户(CCPortal): Influence of Organic Matter on Soil Hydrothermal Processes in the Tibetan Plateau: Observation and Parameterization

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DOI	10.1175/JHM-D-21-0059.1
	Influence of Organic Matter on Soil Hydrothermal Processes in the Tibetan Plateau: Observation and Parameterization
	Sun, Jing; Chen, Yingying; Yang, Kun; Lu, Hui; Zhao, Long; Zheng, Donghai
通讯作者	Yang, K (通讯作者)
发表日期	2021
ISSN	1525-755X
EISSN	1525-7541
起始页码	2659
结束页码	2674
卷号	22 期号:10
英文摘要	In the central-eastern Tibetan Plateau (TP) there is abundant organic matter in topsoils, which plays a crucial role in determining soil hydraulic properties that need to be properly described in land surface models. Limited soil parameterizations consider the impacts of soil organic matter (SOM), but they still show poor performance in the TP. A dedicated field campaign is therefore conducted by taking undisturbed soil samples in the central TP to obtain in situ soil hydraulic parameters and to advance SOM parameterizations. The observed findings are twofold: 1) The SOM pore-size distribution parameter, derived from measured soil water retention curves, has been demonstrated to be much underestimated in previous studies. 2) SOM saturated hydraulic conductivity is overestimated. Accordingly, a new soil hydraulic parameterization is established by modifying a commonly used one based on observations, which is then evaluated by incorporating it into Noah-MP. Compared with the original ones, the new parameterization significantly improves surface soil liquid water simulations at stations with high surface SOM content, especially in the warm season. A further application with the revised Noah-MP indicates that SOM can enhance sensible heat flux but decrease evaporation and subsurface soil temperature in the warm season and tends to have a much weak effect in the cold season. This study provides insights into the role of SOM in modulating soil state and surface energy budget. Note that, however, there are many other factors at play and the new parameterization is not necessarily applicable beyond the TP.
关键词	SIMULATIONS CLIMATE CARBON MODEL CMIP5
英文关键词	Soil moisture; Soil temperature; Surface fluxes; Measurements; Parameterization
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000757151800011
来源期刊	JOURNAL OF HYDROMETEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260216
推荐引用方式 GB/T 7714	Sun, Jing,Chen, Yingying,Yang, Kun,et al. Influence of Organic Matter on Soil Hydrothermal Processes in the Tibetan Plateau: Observation and Parameterization[J]. 中国科学院青藏高原研究所,2021,22(10).
APA	Sun, Jing,Chen, Yingying,Yang, Kun,Lu, Hui,Zhao, Long,&Zheng, Donghai.(2021).Influence of Organic Matter on Soil Hydrothermal Processes in the Tibetan Plateau: Observation and Parameterization.JOURNAL OF HYDROMETEOROLOGY,22(10).
MLA	Sun, Jing,et al."Influence of Organic Matter on Soil Hydrothermal Processes in the Tibetan Plateau: Observation and Parameterization".JOURNAL OF HYDROMETEOROLOGY 22.10(2021).