Changes between Version 2 and Version 3 of DevelopmentActivities/ORCHIDEE-CNP

10/02/15 15:59:15 (5 years ago)



  • DevelopmentActivities/ORCHIDEE-CNP

    v2 v3  
    22= ORCHIDEE-CNP = 
    4 This page describes the work done to include the phosphorus cycle into ORCHIDEE.  
     4This page describes the work done to include the phosphorus cycle into ORCHIDEE. It is based on MERGE-OCN, which was extended and corrected as described here: 
     5The phosphorus cycle is an adaptation of the the model described by 
    8 == Preliminary work : add extra dimensions for some carbon variables (October 2012) == 
     10== Soil type problem == 
     11The phosphorus model needs soil type specific parameters. Therefore, a new input routine is going to be written which reads in USDA soil orders. According to the soil order the parameter values are set for each grid box. 
     13The problem is that ORCHIDEE already reads in fields of soil texture classes which were originally derived from soil orders. According to the soil texture classes, parameter related to soil hydrology are set. As the original data cannot be found anymore, ORCHIDEE will run with two independent sets of soil order specific parameters. Thereby inconsistencies between the phosphorus related parameters and the the hydrology related parameters can be introduced. The practice of reading in soil texture classes instead of soil orders is also problematic in respect of future developments and I suggest this should be changed. 
     15== Work for Albert == 
     16We need a routine which reads the soil orders (n=12) from this file: /home/users/dgoll/ORC_data/USDA_soilorders/ 
     17Currently, all input reading routines are located in src_stomate/stomate_io.f90 
     18There is quite some doubling of code which could be minimized by re-writting the routines, for example outsourcing the remap procedure in a own subroutine/function. 
     20The soil orders as read in from the file should be assigned to a new variable of your choice (following the texture classes of lithological fractions). I handle the rest.