DOI: 10.5194/hess-24-3753-2020
论文题名: Weak sensitivity of the terrestrial water budget to global soil texture maps in the ORCHIDEE land surface model
作者: Tafasca S. ; Ducharne A. ; Valentin C.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 7 起始页码: 3753
结束页码: 3774
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
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). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162630
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Hydrology and Earth System Sciences,2020-01-01,24(7)