Changes between Version 9 and Version 10 of Documentation/EvolutionOfFunctionality


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Timestamp:
2020-04-27T13:18:56+02:00 (4 years ago)
Author:
luyssaert
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  • Documentation/EvolutionOfFunctionality

    v9 v10  
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    33Table 1. Concise description of processes (in alphabetical order) simulated in subsequent model versions 
    4 || '''Process''' || '''ORCHIDEE Krinner et al 2005''' || '''ORCHIDEE v2.1''' || '''ORCHIDEE v3.0''' || '''ORCHIDEE v4.0''' || 
     4|| '''Process''' || '''ORCHIDEE Krinner et al. 2005''' || '''ORCHIDEE v2.1 Peylin et al. ''' || '''ORCHIDEE v3.0 Vuichard et al 2019''' || '''ORCHIDEE 4.0 Naudts et al. 2015''' || 
    55|| Age classes || Not available || Not available || Not available || Age classes were introduced to better handle heterogeneity at the landscape level. Age classes are independent of the number of diameter classes. Using age classes adds a lot of details to both the biophysics and the biogeochemistry following natural disturbances, forest management and land cover change. Age classes are defined as separate PFTs that form an age group ([https://forge.ipsl.jussieu.fr/orchidee/wiki/Documentation/TrunkFunctionality4#Ageclassesr6614 More]) || 
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    7 || Albedo (background || || || || 
    8  
    9 || Albedo (snow) || || || || 
    10  
     6|| Albedo (background || || || || || 
     7|| Albedo (snow) || || || || || 
    118|| Albedo (vegetation)  || 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. || No changes from the previous version. || 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 More]). 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 ([https://forge.ipsl.jussieu.fr/orchidee/wiki/Documentation/TrunkFunctionality4#Albedor6614 More]). || 
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