Changes between Version 14 and Version 15 of Branches/ORCHIDEE_3


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Timestamp:
12/10/20 17:46:23 (12 months ago)
Author:
nvuilsce
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  • Branches/ORCHIDEE_3

    v14 v15  
    1212 
    1313== Model configurations and associated forcings == 
     14=== Standard configuration === 
    1415The standard configuration of ORCHIDEE_3 accounts for a dynamic nitrogen cycle in which Nitrogen content in soil and plant reservoirs varies accordingly to environmental conditions. In this configuration, compared to Carbon-only model versions like ORCHIDEE_2, additional forcings are needed related to the different nitrogen inputs: 
    1516 * '''Nitrogen atmospheric deposition''': ORCHIDEE_3 considers seperately reduced (NHx) and oxydised (NOy) forms of nitrogen. By default, one uses the monthly atmospheric N deposition during 1860 - 2014 from the IGAC/SPARC Chemistry-Climate Model Initiative (CCMI) as in the Tian et al. (2019) and the current GCB papers. They are stored on the shared repositories here:  
    1617  * ${R_IN}/SRF/NITROGEN/N_DEPOSITION/CCMI_ndep/historical/CCMI_ndep_nhx_${year}.nc  
    1718  * ${R_IN}/SRF/NITROGEN/N_DEPOSITION/CCMI_ndep/historical/CCMI_ndep_noy_${year}.nc   
    18  * ''Synthetic fertilizer use''': By default, one uses annual data from Lu and Tian, 2017 (https://doi.pangaea.de/10.1594/PANGAEA.863323) which provide the annual synthetic/mineral N fertilizer rate from 1960 to 2014 specifically for croplands and grasslands. They are stored on the shared repositories here:  
     19 * '''Synthetic fertilizer use''': By default, one uses annual data from Lu and Tian, 2017 (https://doi.pangaea.de/10.1594/PANGAEA.863323) which provide the annual synthetic/mineral N fertilizer rate from 1960 to 2014 specifically for croplands and grasslands. They are stored on the shared repositories here:  
    1920  * ${R_IN}/SRF/NITROGEN/N_FERTILISATION/NMIP/synthetic/historical/Nfer_pasture_${year}.nc 
    2021  * ${R_IN}/SRF/NITROGEN/N_FERTILISATION/NMIP/synthetic/historical/Nfer_cropland_${year}.nc 
     
    2526 * '''Biological nitrogen fixation''': In ORCHIDEE-3, there is no computation of the BNF rate. One uses a single climatology for BNF as a function of present-day evapotranspiration following the approach of Cleveland et al. (1999). The forcing used by default is stored on the shared repositories here:  ${R_IN}/SRF/NITROGEN/BNF/bnf_1850.nc  
    2627In addition to the Nitrogen-related forcings, the mineral nitrogen dynamic model needs soil pH and soil bulk density which are provided as model inputs. Default bulk density at 0.5×0.5 degree resolution is from the Harmonized World Soil Database (HWSD; FAO/IIASA/ISRIC/ISSCAS/JRC, 2012) and default soil pH from the International Geosphere–Biosphere Programme Data Information System (Global Soil Data Task Group, 2000). Datasets are stored on the shared repositories here: ${R_IN}/SRF/SOIL/soil_bulk_and_ph.nc  
     28 
     29=== Non interactive nitrogen configuration ===