Changes between Version 39 and Version 40 of DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic


Ignore:
Timestamp:
2015-03-19T16:33:47+01:00 (9 years ago)
Author:
jpolcher
Comment:

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  • DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

    v39 v40  
    437437  - GK/PP will ask IG if she wants to further work on improving the scheme (given that she is working a bit with ORC) with the objective of energy conservation per layer and not only over the whole year; Other person to work on it are welcome! 
    438438   
    439  
     439== Some comments on hte vertical discretisation by Jan == 
     440 
     441I worked on the vertical discretization scheme as we outlined it in the meeting. I coded up the scheme we chose and found a few problems which we oversaw during the discussion. 
     442 
     443The list of parameters as I see them today : 
     444- depth_max = OK 
     445- depth_Wmax = OK 
     446- depth_geom = OK 
     447- reason_geom_below = OK 
     448 
     449- depth_lin : is probably a bad choice of words. We decided it to have a region of layers with a constant thickness. So I propose the following name instead : depth_cstthickness. 
     450 
     451- depth_topthickness : this is a parameter we forgot. In order to start the geometric series, without a fixed number of layers, we need to choose the thickness of the top most layer. Furthermore this is an important parameter as it is key in the infiltration of water in CWRR. 
     452 
     453- depth_refinebottom (Boolean) : Aurélien and Tristan have demonstrated that if we want to change the lower boundary condition in CWRR we will need to refine the resolution at the bottom. Using symmetry, we can easily set a refinement at the bottom while respecting all the above parameters. 
     454 
     455There are a few dependences between these parameters. I have tried to put them into the code as well. 
     456 
     457This is all coded up in python for testing purposes( https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Meetings/CMIP6/Physic/FinalHydroVert.py). It prints to the screen the levels computed and makes a graphic of the levels for T and W and corresponding layer thickness. So please play around with it and if all are happy we can implement it in the code. 
     458 
     459 
     460