气候变化领域集成服务门户(CCPortal): Weak sensitivity of the terrestrial water budget to global soil texture maps in the ORCHIDEE land surface model

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DOI	10.5194/hess-24-3753-2020
	Weak sensitivity of the terrestrial water budget to global soil texture maps in the ORCHIDEE land surface model
	Tafasca S.; Ducharne A.; Valentin C.
发表日期	2020
ISSN	1027-5606
起始页码	3753
结束页码	3774
卷号	24 期号:7
英文摘要	Soil physical properties play an important role in estimating soil water and energy fluxes. Many hydrological and land surface models (LSMs) use soil texture maps to infer these properties. Here, we investigate the impact of soil texture on soil water fluxes and storage at different scales using the ORCHIDEE (ORganizing Carbon and Hydrology in Dynamic EcosystEms) LSM, forced by several complex or globally uniform soil texture maps. At the point scale, the model shows a realistic sensitivity of runoff processes and soil moisture to soil texture and reveals that loamy textures give the highest evapotranspiration and lowest total runoff rates. The three tested complex soil texture maps result in similar water budgets at all scales, compared to the uncertainties of observation-based products and meteorological forcing datasets, although important differences can be found at the regional scale, particularly in areas where the different maps disagree on the prevalence of clay soils. The three tested soil texture maps are also found to be similar by construction, with a shared prevalence of loamy textures, and have a spatial overlap over 40 % between each pair of maps, which explains the overall weak impact of soil texture map change. A useful outcome is that the choice of the input soil texture map is not crucial for large-scale modelling, but the added value of more detailed soil information (horizontal and vertical resolution, soil composition) deserves further studies. © 2020 Author(s).
语种	英语
scopus关键词	Clay products; Runoff; Soil moisture; Surface measurement; Horizontal and vertical resolutions; Land surface modeling; Land surface models; Meteorological forcing; Soil composition; Soil physical property; Soil water fluxes; Spatial overlap; Budget control; evapotranspiration; land surface; runoff; sandy loam; soil management; soil moisture; soil texture; soil water; water budget; water storage
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159340
作者单位	Tafasca, S., Metis (Milieux Environnementaux, Transferts et Interactions dans les Hydrosystèmes et les Sols), Institut Pierre Simon Laplace (IPSL), Sorbonne Université, Cnrs, Ephe, Paris, France; Ducharne, A., Metis (Milieux Environnementaux, Transferts et Interactions dans les Hydrosystèmes et les Sols), Institut Pierre Simon Laplace (IPSL), Sorbonne Université, Cnrs, Ephe, Paris, France; Valentin, C., IEES-Paris (Institut d'Ecologie et des Sciences de l'Environnement de Paris), Sorbonne Université, Cnrs, Inra, Ird, Paris, France
推荐引用方式 GB/T 7714	Tafasca S.,Ducharne A.,Valentin C.. Weak sensitivity of the terrestrial water budget to global soil texture maps in the ORCHIDEE land surface model[J],2020,24(7).
APA	Tafasca S.,Ducharne A.,&Valentin C..(2020).Weak sensitivity of the terrestrial water budget to global soil texture maps in the ORCHIDEE land surface model.Hydrology and Earth System Sciences,24(7).
MLA	Tafasca S.,et al."Weak sensitivity of the terrestrial water budget to global soil texture maps in the ORCHIDEE land surface model".Hydrology and Earth System Sciences 24.7(2020).