DevelopmentActivities/ORCHIDEE-CN/CERA20C – ORCHIDEE

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Version 25 (modified by pmessina, 7 years ago) (diff)
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In this section the simulations done for ERACLIM2 project are described

1) Simulations set-up

Resolution : 1 x 1 degree

Model Version: 3977

Meteo forcing files :

/ccc/store/cont003/dsm/p24palm/CERA20C_ORCHIDEE

Run.def is set as follow:

   # Soil resistance
   DO_RSOIL=y

   # Stress on plants 
   STRESS_GS=1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.  
   STRESS_GM=1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.  
   STRESS_VCMAX=0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,1.,0.,1.

   # Albedo 
   ALB_LEAF_NIR = 0., 0.23, 0.18, 0.18, 0.20, 0.24, 0.15, 0.26, 0.20, 0.24, 0.27, 0.28, 0.26 
   ALB_LEAF_VIS = 0., 0.04, 0.04, 0.04, 0.04, 0.03, 0.03, 0.03, 0.03, 0.06, 0.06, 0.06, 0.06 
   SNOWA_AGED_NIR = 0.50, 0, 0, 0.10, 0.37, 0.08, 0.16, 0.17, 0.27, 0.44, 0.44, 0.44, 0.44   
   SNOWA_DEC_NIR = 0.13, 0, 0, 0.10, 0.10, 0.16, 0.04, 0.07, 0.08, 0.12, 0.12, 0.12, 0.12    
   SNOWA_AGED_VIS = 0.74, 0, 0, 0.08, 0.24, 0.07, 0.18, 0.18, 0.33, 0.57, 0.57, 0.57, 0.57   
   SNOWA_DEC_VIS = 0.21, 0, 0, 0.14, 0.08, 0.17, 0.05, 0.06, 0.09, 0.15, 0.15, 0.15, 0.15

Historical simulation period: 1901-01-01 - 2010-12-31

Land use:

/ccc/work/cont003/igcmg/igcmg/IGCM/SRF/albedo/alb_bg_modisopt_2D_ESA_v2.nc

Albedo:

/ccc/work/cont003/igcmg/igcmg/IGCM/SRF/PFTMAPS/CMIP6/ESA-LUH2/historical/v1/withoutNoBio/13PFTmap_1860_ESA_LUH2v2h_withoutNoBio_v1.nc

2) Where to find the principal files?

Three simulations were performed: CERA20C.3977, CERA20C.3977.test01 and CERA20C.3977.test02

a) CERA20C.3977 is the reference simulation

Outputs are stored in curie :

/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977

Configuration files are:

Spin-up: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG1med.CERA20C.3977
Transient: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG1transmed.CERA20C.3977
Historical: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977

b) CERA20C.3977.test01 simulation has the same configuration of CERA20C.3977, but the land use and albedo are those used by default by ORCHIDEE (PFTmap_IPCC_${year}.nc and alb_bg_modisopt_2D.nc)

Outputs are stored in curie :

/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977.test01

Configuration files are:

Spin-up: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG1med.CERA20C.3977.test01
Transient: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG1transmed.CERA20C.3977.test01
Historical: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977.test01

c) CERA20C.3977.test02 simulation has the same configuration of CERA20C.3977, but the land use does not change being alway at 1860

Outputs are stored in curie :

/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977.test02

Configuration files are:

Spin-up: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG1med.CERA20C.3977
Transient: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG1transmed.CERA20C.3977.test02
Historical: /ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977.test02

3) Where the CERA-20C files are stored and how these kind of files can be downloaded again

Meteorological CERA-20C are temporarily stored here:

/ccc/scratch/cont003/dsm/p24palm/CERA20C/NETCDF/GLOBAL_100/daily/FC_SF

If you want to download other files from ECMWF MARS system please contact:
Sophie Cloché
sbcipsl@… ou Sophie.Cloche@…

In general the files are put in the IDRIS server. So if you want to transfer the files from IDRIS to CURIE or other servers of the LSCE, please contact:
Anne Cozic
anne.cozic@…

A script to make the download from IDRIS to CURIE is here:
/ccc/cont003/home/dsm/p24palm/SYNC_CERA20C/synchro_ecmwf_gaya_to_mercure_2
But to run it the password from Anne is necessary.

4) How the forcing file are built up

The fortran script to transform the raw CERA-20C files in forcing for ORCHIDEE can be found here:

/ccc/work/cont003/dsm/p24palm/makeforc_CERA20C/prepare_forcing_cera20c.f90

To compile it, the following file has to be used:

/ccc/work/cont003/dsm/p24palm/makeforc_CERA20C/compile.sh

The Land-Sea-Mask file (lsm.19000101.fshce2.GLOBAL_100.nc), that is necessary to run the script, is copied in the same folder and it can be also found here:

/ccc/scratch/cont003/dsm/p24palm/CERA20C/NETCDF/GLOBAL_100/daily/FC_SF/lsm.19000101.fshce2.GLOBAL_100.nc

Some parts of the script to verify, before running it again, are reported below:

CHARACTER(len=*), PARAMETER :: pathin ='/ccc/scratch/cont003/dsm/p24palm/CERA20C/NETCDF/GLOBAL_100/daily/FC_SF'      ! This has to be modified = Where are located the raw data
CHARACTER(len=*), PARAMETER :: pathout='/ccc/store/cont003/dsm/p24palm/CERA20C_ORCHIDEE/' ! This has to be modified = Where do you want to put the output files

! Initialisations
! This has to be modified - (could become arguments of the executable)
! Insert the day, month and year from which you want to start 
day=1
month=1
year=1955
! Insert the number of year for which you want to create the ORCHIDEE meteo forcing files
nbyear=2

!@FM_090609 Lecture Land-Sea-Mask
! This can be change, but you should search for another land-sea mask at 1deg resolution
cfile_lsm='lsm.19000101.fshce2.GLOBAL_100.nc'           !@PM_161205

! Change the name here with one appropriate file, if you change the dataset
! This file is only used for reading the latitude and longitude  
cfile_lsm='/ccc/scratch/cont003/dsm/p24palm/CERA20C/NETCDF/GLOBAL_100/daily/FC_SF/1900/t2.19000101.fshce2.GLOBAL_100.nc'      !@PM_161205

5) How the plant death due to low precipitation bias in the Amazon area is fixed in ORCHIDEE

The low precipitation biases in Amazon area kill a big part of the vegetation there. The resulting vegetation distribution is not realistic at all.
To overcome this problem, avoiding the bias correction of the precipitation field, we can set ALWAYS_INIT = .TRUE. in the run.def.
Activating this flag we impose to vegetation to always start growing at the beginning of the growing season. By default this flag can be activated only for deciduous plants.
To impose the ALWAYS_INIT to all plants we change few lines in stomate_phenology.f90:

    !! 4. Leaf growth and biomass allocation when leaf biomass is low.
    !!   Leaves start to grow if biometeorological conditions are favourable (::begin_leaves == TRUE) and if
    !!   leaf growth is allowed (::allow_initpheno == TRUE).
    !!   PFTs and then grid cells are looped over.
    !

    DO j = 2,nvm ! Loop over # PFTs

       age_reset(:) = .FALSE.

       DO i = 1, npts

          !! Added the case((pheno_model(j) == "none") .AND. (biomass(i,j,ileaf,icarbon).LT. min_sechiba)) condition
          !! to deal with extreme cases when the evergreen leaf biomass reaches zero 
          IF ( (veget_max(i,j) .GT. min_sechiba) .AND. (always_init .AND. (pheno_model(j) == "none") .AND. (biomass(i,j,ileaf,icarbon) .LT. min_sechiba) ) )  THEN
             lm_min(i) = lai_initmin(j) / sla(j)
             biomass(i,j,ileaf,icarbon) = biomass(i,j,ileaf,icarbon) + lm_min(i)
             biomass(i,j,iroot,icarbon) = biomass(i,j,iroot,icarbon) + lm_min(i)
             co2_to_bm(i,j) = co2_to_bm(i,j) + ( lm_min(i) * 2 ) / dt
          ENDIF

Some tests are done to check that these changes allow the plants to survive over the Amazonian area:

1) CERA20C.3977.AMAZ07: ALWAYS_INIT = .TRUE. 2) CERA20C.3977.AMAZ09: ALWAYS_INIT = .TRUE. and imposing the vegetation to PFT = 2 3) CERA20C.3977.AMAZ11: ALWAYS_INIT = .FALSE. 4) CERA20C.3977.AMAZ12: ALWAYS_INIT = .FALSE. and imposing the vegetation to PFT = 2

Outputs are stored in curie :

/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977/FG2med.CERA20C.3977.AMAZ07
/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977/FG2med.CERA20C.3977.AMAZ09
/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977/FG2med.CERA20C.3977.AMAZ11
/ccc/store/cont003/dsm/p24palm/IGCM_OUT/OL2/PROD/ref3977/FG2med.CERA20C.3977.AMAZ12

Configuration files are:

/ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977.AMAZ07
/ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977.AMAZ09
/ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977.AMAZ11
/ccc/work/cont003/dsm/p24palm/ORCHIDEE_TRUNK/modipsl/config/ORCHIDEE_OL/FG2med.CERA20C.3977.AMAZ12

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