globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000507
Scopus记录号: 2-s2.0-84959469848
论文题名:
Development and evaluation of a new soil moisture and runoff parameterization for the CABLE LSM including subgrid-scale processes
作者: Decker M
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期:4
起始页码: 1788
结束页码: 1809
语种: 英语
英文关键词: Cables ; Catchments ; Climate models ; Digital storage ; Evapotranspiration ; Groundwater ; Hydrology ; Moisture ; Parameterization ; Soil moisture ; Soils ; Vegetation ; Water supply ; Evaluation study ; Land surface models ; Northern Hemispheres ; Runoff generation ; Runoff generation process ; Sub-grid scale process ; Subsurface run-off ; Surface runoff generation ; Runoff ; catchment ; evapotranspiration ; groundwater flow ; heterogeneity ; hydrology ; land surface ; Northern Hemisphere ; numerical model ; runoff ; soil moisture ; vegetation type ; water storage
英文摘要: New conceptual parameterizations of subgrid-scale soil moisture, runoff generation, and groundwater are developed and tested in the offline version of the Community Atmosphere and Biosphere Land Exchange (CABLE) model. These developments are designed to address a known bias in CABLE: The excess simulation of mean evapotranspiration over most of the Northern Hemisphere and over most vegetation types at global scales. The inclusion of subgrid-scale soil moisture parameterizations and runoff generation processes largely mitigates the overestimation of evapotranspiration, and simultaneously improves the simulation of mean runoff. There are also pronounced improvements in total water storage anomalies as compared to various observationally derived estimates. It is shown that surface and subsurface runoff generation resulting from subgrid-scale soil moisture heterogeneity is necessary to accurately simulate the mean observed runoff and evapotranspiration. Surface runoff generation is largely responsible from reducing the mean evapotranspiration bias north of 30°N. We note that the inability of previous CABLE evaluation studies to demonstrate the need for subgrid-scale heterogeneity is likely due to only testing at flux tower site scales. Evaluating land models at point scale and catchment scale across a large range of climate and vegetation types is necessary to evaluate the contributions of processes that influence the model at various spatial scales. Flux tower data are therefore a necessary but insufficient constraint on land surface models. © 2015. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75971
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: ARC Centre of Excellence for Climate System Science, Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia

Recommended Citation:
Decker M. Development and evaluation of a new soil moisture and runoff parameterization for the CABLE LSM including subgrid-scale processes[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(4)
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