Hauptseite > Publikationsdatenbank > Effects of horizontal grid resolution on evapotranspiration partitioning using TerrSysMP > print

001     857176
005     20210129235518.0
024 7 _ |a 10.1016/j.jhydrol.2018.01.024
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024 7 _ |a 1879-2707
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100 1 _ |a Shrestha, P.
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245 _ _ |a Effects of horizontal grid resolution on evapotranspiration partitioning using TerrSysMP
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a Biotic leaf transpiration (T) and abiotic evaporation (E) are the two major pathways by which water is transferred from land surfaces to the atmosphere. Earth system models simulating the terrestrial water, carbon and energy cycle are required to reliably embed the role of soil and vegetation processes in order to realistically reproduce both fluxes including their relative contributions to total evapotranspiration (ET). Earth system models are also being used with increasing spatial resolutions to better simulate the effects of surface heterogeneity on the regional water and energy cycle and to realistically include effects of subsurface lateral flow paths, which are expected to feed back on the exchange fluxes and their partitioning in the model.Using the hydrological component of the Terrestrial Systems Modeling Platform (TerrSysMP), we examine the uncertainty in the estimates of T/ET ratio due to horizontal model grid resolution for a dry and wet year in the Inde catchment (western Germany). The aggregation of topography results in smoothing of slope magnitudes and the filtering of small-scale convergence and divergence zones, which directly impacts the surface-subsurface flow. Coarsening of the grid resolution from 120 m to 960 m increased the available soil moisture for ground evaporation, and decreased T/ET ratio by about 5% and 8% for dry and wet year respectively. The change in T/ET ratio was more pronounced for agricultural crops compared to forested areas, indicating a strong local control of vegetation on the ground evaporation, affecting the domain average statistics.
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536 _ _ |a Towards regional-scale groundwater-atmosphere coupled climate simulations (hbn33_20170501)
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700 1 _ |a Sulis, M.
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700 1 _ |a Simmer, C.
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700 1 _ |a Kollet, S.
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773 _ _ |a 10.1016/j.jhydrol.2018.01.024
|g Vol. 557, p. 910 - 915
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856 4 _ |u https://juser.fz-juelich.de/record/857176/files/1-s2.0-S0022169418300246-main.pdf
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