Changes between Version 37 and Version 38 of Documentation/Drivers


Ignore:
Timestamp:
10/01/21 16:42:38 (4 months ago)
Author:
xnwang
Comment:

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  • Documentation/Drivers

    v37 v38  
    99We have two drivers available, src_driver/dim2driver and src_driver/orchideedriver. We would like to have only one standard driver for ORCHIDEE in the end. 
    1010 
    11 == The old driver (src_driver/dim2driver) == 
     11''' I) The old driver (src_driver/dim2driver)''' 
    1212   This driver assumes that scalar variables (Tair,Qair,Psurf,Wind) are instantaneous values at the timestamp, while flux variables (Rainf,Snowf, SWdown, LWdown) are mean values over the interval ending at the timestamp. This driver also requires that the first value of the annual files corresponds to 00UTC+dt_forcing (for instance 03UTC for a 3hourly forcing), and that the last value is for Dec 31st at 24UTC = 00UTC on Jan 1st of the following year. Your files must be prepared accordingly.  
    1313 
     
    1818* '''SPRED_PREC''': By default, we spread the precipitation over half the forcing time step (1.5h and 3h respectively for 3-hourly and 6-hourly files).  
    1919 
    20 == The new driver (src_driver/orchideedriver.f90) == 
     20''' II) The new driver (src_driver/orchideedriver.f90)''' 
    2121  This driver is expected to be more flexible and to deal with any temporal structure of the forcing datasets, provided the required attributes are inserted in the forcing files. This document [attachment:Description_Forcing_Files.pdf] provides details of how forcing files need to be prepared. It addresses in particular the issues one may face when the fluxes are averaged and scalar variables are instantaneous. The driver needs to take this into account,otherwise the diurnal cycle can be misplaced. Some data providers have different conventions for representing averaged fluxes, and such information is important to know.   
    2222 
     
    3737 
    3838== Previous discussion and recent efforts about the new driver == 
    39 A long discussion on the differences between the two drivers (dated in 2016) can be found on https://forge.ipsl.jussieu.fr/orchidee/wiki/Branches/Driver_Improvements. 
     39The new driver was initially developed by Jan in the branch Routing, and then it was included in ORCHIDEE by Josefine. A long discussion on the differences between the two drivers (dated in 2016) can be found on https://forge.ipsl.jussieu.fr/orchidee/wiki/Branches/Driver_Improvements. 
    4040 
    41 The work on the new driver has been picked up since July 2020 by X. Wang. A short report summarizes the first part of this efforts and can be found on https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Documentation/Forcings/nouveau_driver_doc.2.pdf. 
    4241 
    43 '''Recent progress ''' on the integration of new driver into the trunk: 
     42'''I) Recent progress ''' 
     43 
     44Recently, the work on the new driver has been picked up by X. Wang since July 2020. A short report summarizes the first part of this efforts and can be found on https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Documentation/Forcings/nouveau_driver_doc.2.pdf. The continued efforts are summarized below. 
    4445 
    4546* the recent version of new driver is included in the trunk. This is committed in r7082.