气候变化领域集成服务门户(CCPortal): Augmentations to the Noah Model Physics for Application to the Yellow River Source Area. Part I: Soil Water Flow

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DOI	10.1175/JHM-D-14-0198.1
	Augmentations to the Noah Model Physics for Application to the Yellow River Source Area. Part I: Soil Water Flow
	Zheng, Donghai; van der Velde, Rogier; Su, Zhongbo; Wang, Xin; Wen, Jun; Booij, Martijn J.; Hoekstra, Arjen Y.; Chen, Yingying
通讯作者	Zheng, DH (通讯作者)
发表日期	2015
ISSN	1525-755X
EISSN	1525-7541
起始页码	2659
结束页码	2676
卷号	16 期号:6
英文摘要	This is the first part of a study focusing on evaluating the performance of the Noah land surface model ( LSM) in simulating surfacewater and energy budgets for the high-elevation source region of the Yellow River ( SRYR). A comprehensive dataset is utilized that includes in situ micrometeorological and profile soil moisture and temperature measurements as well as laboratory soil property measurements of samples collected across the SRYR. Here, the simulation of soil water flow is investigated, while Part II concentrates on the surface heat flux and soil temperature simulations. Three augmentations are proposed: 1) to include the effect of organic matter on soil hydraulic parameterization via the additivity hypothesis, 2) to implement the saturated hydraulic conductivity K-s as an exponentially decaying function with soil depth, and 3) to modify the vertical root distribution to represent the Tibetan conditions characterized by an abundance of roots in the topsoil. The diffusivity form of Richards' equation is further revised to allow for the simulation of soil water flow across soil layers with different hydraulic properties. Usage of organic matter for calculating the porosity and soil suction improves the agreement between the estimates and laboratory measurements, and the exponential function together with the Kozeny-Carman equation best describes the in situ Ks. Through implementation of the modified hydraulic parameterization alone, the soil moisture underestimation in the upper soil layer under wet conditions is resolved, while the soil moisture profile dynamics are better captured by also including the modified root distribution.
关键词	SATURATED HYDRAULIC CONDUCTIVITY LAND-SURFACE MODEL TIBETAN PLATEAU ROOT DISTRIBUTIONS ORGANIC-MATTER ENERGY-BALANCE MOISTURE HYDROLOGY PRODUCTS CLIMATE
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000364976900001
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/258466
推荐引用方式 GB/T 7714	Zheng, Donghai,van der Velde, Rogier,Su, Zhongbo,et al. Augmentations to the Noah Model Physics for Application to the Yellow River Source Area. Part I: Soil Water Flow[J]. 中国科学院青藏高原研究所,2015,16(6).
APA	Zheng, Donghai.,van der Velde, Rogier.,Su, Zhongbo.,Wang, Xin.,Wen, Jun.,...&Chen, Yingying.(2015).Augmentations to the Noah Model Physics for Application to the Yellow River Source Area. Part I: Soil Water Flow.JOURNAL OF HYDROMETEOROLOGY,16(6).
MLA	Zheng, Donghai,et al."Augmentations to the Noah Model Physics for Application to the Yellow River Source Area. Part I: Soil Water Flow".JOURNAL OF HYDROMETEOROLOGY 16.6(2015).