Changes between Version 4 and Version 5 of Documentation/EvolutionOfFunctionality


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Timestamp:
2020-04-27T11:38:22+02:00 (4 years ago)
Author:
luyssaert
Comment:

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  • Documentation/EvolutionOfFunctionality

    v4 v5  
    33Table 1. Concise description of processes (in alphabetical order) simulated in subsequent model versions 
    44|| '''Process''' || '''ORCHIDEE Krinner et al 2005''' || '''ORCHIDEE v2.1''' || '''ORCHIDEE v3.0''' || '''ORCHIDEE v4.0''' || 
    5 || Albedo  || For each PFT the total albedo for the grid square is computed as a weighted average of the vegetation albedo and the background albedo. The background albedo is composed by a snow and soil albedo. The soil albedo depends on the soil properties.|| Rather than using soil properties, ORCHIDEE v2.1 uses spatially explicit observation-derived estimates for its background albedo in the absence of snow. || Not changed || ORCHIDEE trunk 4 makes use of a two stream radiative transfer scheme through the canopy, extended to multiple canopy levels (​https://doi.org/10.5194/gmd-2016-280). The scheme is based on Pinty et al 2006. This approach accounts not only for the leaf mass but also for the vertical and horizontal distribution of the leaf mass (= canopy structure), calculating an effective LAI based on the solar angle. Light from collimated (black sky) and diffuse (white sky) sources are used, and both are weighted equally as information about this partitioning is not yet available in forcing data.|| 
     5|| Albedo  || For each PFT the total albedo for the grid square is computed as a weighted average of the vegetation albedo and the background albedo. The background albedo is composed by a snow and soil albedo. The soil albedo depends on the soil properties.|| Rather than using soil properties, ORCHIDEE v2.1 uses spatially explicit observation-derived estimates for its background albedo in the absence of snow. || Not changed || ORCHIDEE trunk 4 makes use of a two stream radiative transfer scheme through the canopy, extended to multiple canopy levels (​https://doi.org/10.5194/gmd-2016-280). The scheme is based on Pinty et al 2006. This approach accounts not only for the leaf mass but also for the vertical and horizontal distribution of the leaf mass (= canopy structure), calculating an effective LAI based on the solar angle. Light from collimated (black sky) and diffuse (white sky) sources are used, and both are weighted equally as information about this partitioning is not yet available in forcing data. || 
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