A multi-level canopy radiative transfer scheme for ORCHIDEE (SVN r2566), based on a domain-averaged structure factor
- 1Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
- 2Land Resources Management Unit, Institute for Environment and Sustainability, Joint Research Centre, European Commission, Ispra, Italy
- 3Institut Pierre Simon Laplace, Place Jussieu 4, 75010 Paris, France
- 4VU Amsterdam, Department of Ecological Science, 1081 HV Amsterdam, Netherlands
- anow at: Climate Service Center Germany, Helmholtz-Zentrum Geesthacht, 20095 Hamburg
- bnow at: Max Planck Institute for Meteorology, Hamburg, Germany
- cnow at: National Central University, Graduate Institute of Hydrological & Oceanic Sciences, Taoyuan City, Taiwan
- dnow at: VU Amsterdam, Department of Ecological Science, 1081 HV Amsterdam, Netherlands
- *Equal contributions
- 1Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
- 2Land Resources Management Unit, Institute for Environment and Sustainability, Joint Research Centre, European Commission, Ispra, Italy
- 3Institut Pierre Simon Laplace, Place Jussieu 4, 75010 Paris, France
- 4VU Amsterdam, Department of Ecological Science, 1081 HV Amsterdam, Netherlands
- anow at: Climate Service Center Germany, Helmholtz-Zentrum Geesthacht, 20095 Hamburg
- bnow at: Max Planck Institute for Meteorology, Hamburg, Germany
- cnow at: National Central University, Graduate Institute of Hydrological & Oceanic Sciences, Taoyuan City, Taiwan
- dnow at: VU Amsterdam, Department of Ecological Science, 1081 HV Amsterdam, Netherlands
- *Equal contributions
Abstract. In order to better simulate heat fluxes over multilayer ecosystems, in particular tropical forests and savannahs, the next generation of Earth system models will likely include vertically-resolved vegetation structure and multi-level energy budgets. We present here a multi-level radiation transfer scheme which is capable of being used in conjunction with such methods. It is based on a previously established scheme which encapsulates the three dimensional nature of canopies, through the use of a domain-averaged structure factor, referred to here as the effective leaf area index. The fluxes are tracked throughout the canopy in an iterative fashion until they escape into the atmosphere or are absorbed by the canopy or soil; this approach explicitly includes multiple scattering between the canopy layers. A series of tests show that the results from the two-layer case are in acceptable agreement with those from the single layer, although the computational cost is necessarily increased due to the iterations. The ten-layer case is less precise, but still provides results to within an acceptable range. This new approach allows for the calculation of radiation transfer in vertically resolved vegetation canopies simulated in global circulation models.
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Matthew J. McGrath et al.


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RC1: 'A useful incremental advance', Anonymous Referee #1, 08 Dec 2016
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AC1: 'Response to referee #1', James Ryder, 01 Aug 2017
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AC1: 'Response to referee #1', James Ryder, 01 Aug 2017
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RC2: 'Reviewer comments to "A multi-level canopy radiative transfer scheme for ORCHIDEE (SVN r2566), based on a domain-averaged structure factor"', Anonymous Referee #2, 05 Feb 2017
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AC2: 'Response to referee #2', James Ryder, 01 Aug 2017
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AC2: 'Response to referee #2', James Ryder, 01 Aug 2017


-
RC1: 'A useful incremental advance', Anonymous Referee #1, 08 Dec 2016
-
AC1: 'Response to referee #1', James Ryder, 01 Aug 2017
-
AC1: 'Response to referee #1', James Ryder, 01 Aug 2017
-
RC2: 'Reviewer comments to "A multi-level canopy radiative transfer scheme for ORCHIDEE (SVN r2566), based on a domain-averaged structure factor"', Anonymous Referee #2, 05 Feb 2017
-
AC2: 'Response to referee #2', James Ryder, 01 Aug 2017
-
AC2: 'Response to referee #2', James Ryder, 01 Aug 2017
Matthew J. McGrath et al.
Matthew J. McGrath et al.
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Cited
8 citations as recorded by crossref.
- ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales C. Qiu et al. 10.5194/gmd-11-497-2018
- Effects of Incorporating Measured Leaf Optical Properties in Land Surface Models W. Dong et al. 10.3389/feart.2021.663917
- Evaluation of leaf-level optical properties employed in land surface models T. Majasalmi & R. Bright 10.5194/gmd-12-3923-2019
- Simulating damage for wind storms in the land surface model ORCHIDEE-CAN (revision 4262) Y. Chen et al. 10.5194/gmd-11-771-2018
- Models meet data: Challenges and opportunities in implementing land management in Earth system models J. Pongratz et al. 10.1111/gcb.13988
- A vertically discretised canopy description for ORCHIDEE (SVN r2290) and the modifications to the energy, water and carbon fluxes K. Naudts et al. 10.5194/gmd-8-2035-2015
- A multi-layer land surface energy budget model for implicit coupling with global atmospheric simulations J. Ryder et al. 10.5194/gmd-9-223-2016
- Development and Verification of a Numerical Library for Solving Global Terrestrial Multiphysics Problems G. Bisht & W. Riley 10.1029/2018MS001560