New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE
Abstract The Community Atmosphere Biosphere Land Exchange (CABLE) land surface model overestimates evapotranspiration (E) at numerous flux tower sites during boreal spring. The overestimation of E is not eliminated when the nonlinear dependence of soil evaporation on soil moisture or a simple litter...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2017-03-01
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| Series: | Journal of Advances in Modeling Earth Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/2016MS000832 |
| _version_ | 1797736038930579456 |
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| author | Mark Decker Dani Or Andy Pitman Anna Ukkola |
| author_facet | Mark Decker Dani Or Andy Pitman Anna Ukkola |
| author_sort | Mark Decker |
| collection | DOAJ |
| description | Abstract The Community Atmosphere Biosphere Land Exchange (CABLE) land surface model overestimates evapotranspiration (E) at numerous flux tower sites during boreal spring. The overestimation of E is not eliminated when the nonlinear dependence of soil evaporation on soil moisture or a simple litter layer is introduced into the model. New resistance terms, previously developed from a pore‐scale model of soil evaporation, are incorporated into the treatment of under canopy water vapor transfer in CABLE. The new resistance terms reduce the large positive bias in spring time E at multiple flux tower sites and also improve the simulation of daily sensible heat flux. The reduction in the spring E bias allows the soil to retain water into the summer, improving the seasonality of E. The simulation of daily E is largely insensitive to the details of the implementation of the pore model resistance scheme. The more physically based treatment of soil evaporation presented here eliminates the need for empirical functions that reduce evaporation as a function of soil moisture that are included in many land surface models. |
| first_indexed | 2024-03-12T13:07:47Z |
| format | Article |
| id | doaj.art-e5ec9d77380c42a5b4c184299877820c |
| institution | Directory Open Access Journal |
| issn | 1942-2466 |
| language | English |
| last_indexed | 2024-03-12T13:07:47Z |
| publishDate | 2017-03-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Journal of Advances in Modeling Earth Systems |
| spelling | doaj.art-e5ec9d77380c42a5b4c184299877820c2023-08-28T13:36:50ZengAmerican Geophysical Union (AGU)Journal of Advances in Modeling Earth Systems1942-24662017-03-019122023810.1002/2016MS000832New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLEMark Decker0Dani Or1Andy Pitman2Anna Ukkola3ARC Centre of Excellence for Climate System Science, Climate Change Research CentreUniversity of New South WalesSydney AustraliaDepartment of Environmental Systems Science, Soil and Terrestrial Environmental PhysicsETH Zürich Zürich SwitzerlandARC Centre of Excellence for Climate System Science, Climate Change Research CentreUniversity of New South WalesSydney AustraliaARC Centre of Excellence for Climate System Science, Climate Change Research CentreUniversity of New South WalesSydney AustraliaAbstract The Community Atmosphere Biosphere Land Exchange (CABLE) land surface model overestimates evapotranspiration (E) at numerous flux tower sites during boreal spring. The overestimation of E is not eliminated when the nonlinear dependence of soil evaporation on soil moisture or a simple litter layer is introduced into the model. New resistance terms, previously developed from a pore‐scale model of soil evaporation, are incorporated into the treatment of under canopy water vapor transfer in CABLE. The new resistance terms reduce the large positive bias in spring time E at multiple flux tower sites and also improve the simulation of daily sensible heat flux. The reduction in the spring E bias allows the soil to retain water into the summer, improving the seasonality of E. The simulation of daily E is largely insensitive to the details of the implementation of the pore model resistance scheme. The more physically based treatment of soil evaporation presented here eliminates the need for empirical functions that reduce evaporation as a function of soil moisture that are included in many land surface models.https://doi.org/10.1002/2016MS000832soil evaporationland surface modelparameterization |
| spellingShingle | Mark Decker Dani Or Andy Pitman Anna Ukkola New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE Journal of Advances in Modeling Earth Systems soil evaporation land surface model parameterization |
| title | New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE |
| title_full | New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE |
| title_fullStr | New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE |
| title_full_unstemmed | New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE |
| title_short | New turbulent resistance parameterization for soil evaporation based on a pore‐scale model: Impact on surface fluxes in CABLE |
| title_sort | new turbulent resistance parameterization for soil evaporation based on a pore scale model impact on surface fluxes in cable |
| topic | soil evaporation land surface model parameterization |
| url | https://doi.org/10.1002/2016MS000832 |
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