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#!html
The NEMO configurations
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[[PageOutline(1-2,Table of contents,,numbered)]]
Person in charge: Christian Ethé
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# 1. Description #
The NEMO configuration described here is an ocean-sea ice configuration based on the version 3.6 stable of NEMO (Nucleus for European Models of the Ocean), which includes three major components: the ocean physics NEMO-OPA, the sea-ice dynamics and thermodynamics NEMO-LIM3 and the ocean biogeochemistry NEMO-PISCES. The available resolutions builded on the ORCA quasi-isotropic global tripolar grid are 2°, 1° and 1/4°. The 1° (eORCA1) and 1/4° (eORCA025) are extended to the south so as to better represent the contribution of Antarctic under-ice shelf seas to the Southern ocean freshwater cycle. Notice that the biogeochemical model PISCES can be run coupled online with the dynamics ( ORCA1-LIM3-PISCES for example ) or in a "stand-alone" ( ORCA2-LIM3-PISCES). This NEMO configuration has been builded to be able to perfom the OMIP6 experiments ( omip1 and omip2 protocol) ; thus some specific sources code are available through the shaconemo repository.
To find out more about the model description and the reference configurations, go here: http://www.nemo-ocean.eu/About-NEMO.
To use and extract NEMO, you first need to register and choose a login/passwd
# 1. Technical details #
## 1. 1 The configuration on mod.def ##
{{{
#-H- NEMO_v6_OMIP NEMOGCM for CMIP6 exercise
#-H- NEMO_v6_OMIP libIGCM trunk rev 1471
#-H- NEMO_v6_OMIP XIOS branch xios-2.5 rev 1550
#-M- NEMO_v6_OMIP Christian.Ethe@ipsl.fr
#-C- NEMO_v6_OMIP trunk/libIGCM 1476 10 libIGCM .
#-C- NEMO_v6_OMIP branches/2015/nemo_v3_6_STABLE/NEMOGCM 9455 7 . modeles
#-C- NEMO_v6_OMIP trunk/ORCA1_LIM3_PISCES 275 17 . modeles/NEMOGCM/CONFIG
#-C- NEMO_v6_OMIP trunk/eORCA025_LIM3 275 17 . modeles/NEMOGCM/CONFIG
#-C- NEMO_v6_OMIP trunk/eORCA025_LIM3_PISCES 275 17 . modeles/NEMOGCM/CONFIG
#-C- NEMO_v6_OMIP trunk/ORCA1_OFF_PISCES 275 17 . modeles/NEMOGCM/CONFIG
#-C- NEMO_v6_OMIP CONFIG/UNIFORM/v6/NEMO_v6 4716 8 NEMO_v6 config
#-C- NEMO_v6_OMIP XIOS/branchs/xios-2.5 1550 12 XIOS modeles
}}}
## 1.2. Setting up NEMO with the modipsl environment ##
### Retrieval ###
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mkdir $WORKDIR/NEMO_STD ; cd $WORKDIR/NEMO_STD
svn co http://forge.ipsl.jussieu.fr/igcmg/svn/modipsl/trunk modipsl
cd modipsl/util
./model NEMO_v6_OMIP
}}}
Several built-in configurations are provided to evaluate the skills and performances of the model ( cd ../config/NEMO_v6 ) . They can be used as as first easy set-up and as template for setting up a new configuration :
* ORCA2_LIM3_PISCES : the fully coupled global ocean on 2° horizontal grid and 31 vertical levels, with 10 levels in the top 100m
* ORCA2_OFF_PISCES : stand-alone PISCES biogeochemical model on ORCA2 - dynamical fields are pre-calculated and read with specific time frequency
* ORCA1_LIM3_PISCES : the fully coupled global ocean on 1° horizontal grid, extended to the south and 75 vertical levels ( from 1~m at the surface to 10~m at 100~m depth, and reaches 200~m at the bottom)
* ORCA1_LIM3_PISCES_CMIP6 : the ORCA1_LIM3_PISCES but to run the OMIP6 experiments
* ORCA1_OFF_PISCES : stand-alone PISCES biogeochemical model on ORCA1
* ORCA025_LIM3 : the global ocean on 1/4° horizontal grid, without the PISCES model
* ORCA025_LIM3_PISCES : the fully coupled global ocean on 1/4° horizontal grid
### Compiling and installing ###
Compiling NEMOGCM : config ORCA1_LIM3_PISCES on ADA/CURIE
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#!sh
cd modipsl/modeles/NEMOGCM/CONFIG
./makenemo -h all # help to see the options and the available arch
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Available compilers at CNRS :
* ALTIX_JADE : ifort compiler options for CINES SGI-ALTIX Jade, http://www.cines.fr/spip.php?rubrique291
* BG_BABEL : babel IBM !BlueGene/P at french IDRIS, http://www.idris.fr/su/Scalaire/babel
* X64_ADA : Ada IBM x3750 at french IDRIS, http://www.idris.fr/ada/ada-hw-ada.html
* TX7_ULAM : ulam IBM X3950 M2 at french IDRIS, http://www.idris.fr/su/Scalaire/ulam/hw-ulam.html
* X64_CURIE : Curie BULL at french TGCC, http://www-hpc.cea.fr/en/complexe/tgcc-curie.htm
* X64_TITANE : titane BULL at french CCRT, http://www-ccrt.cea.fr/fr/moyen_de_calcul/titane.htm
* X86_CESIUM : cesium pre/post processing HP at french CCRT, doesn't exist anymore.
{{{
#!sh
on ada : ./makenemo -n ORCA1_LIM3_PISCES -m X64_ADA -j 8
on curie : ./makenemo -n ORCA1_LIM3_PISCES -m X64_CURIE -j 8
}}}
And the copy the binary in the appropriate directory
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#!sh
cp ORCA1_LIM3_PISCES/BLD/bin/nemo.exe ../../../bin/.
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# 2. Creating the job #
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cd modipsl/config/NEMO_v6
cp EXPERIMENTS/ORCA1_LIM3_PISCES/ia/config.card .
../../libIGCM/ins_job
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# 3. Running the model #
## 3.1 Input files: atmospheric forcings, initial states, namelists ##
The card files ( opa9.card for orca1_lim and pisces.card for pisces) contain the list of files needed to perform the simulation.[[BR]]
These files are described here: https://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocImodelAnemo
## 3.2 The run ##
This example is a 50 years CORE2 forcing climatological run of ORCA1_LIM3_PISCES split in 1-year jobs.
{{{
JobName=eOR1L3P
#----- Short Name of Experiment
ExperimentName=ORCA1clim
#----- DEVT TEST PROD
SpaceName=DEVT
LongName="ORCA1_LIM3_PISCES NEMO configuration"
TagName=ORCA1_LIM3_PISCES
#D- Choice of experiment in EXPERIEMENTS directory
ExpType=ORCA1_LIM3_PISCES/clim
#============================
#-- leap, noleap, 360d
CalendarType=noleap
#-- Begin and end of Job
#-- "YYYY-MM-DD"
DateBegin=0001-01-01
DateEnd=0050-12-31
#============================
#-- 1Y, 1M, 5D, 1D
PeriodLength=1Y
}}}
## 3.2 Submlit the job ##
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#!sh
on ada : llsubmit Job_eOR1L3P
on curie: ccc_msub Job_eOR1L3P
}}}
## Performances ##
The performances of the eORCA1_LIM3_PISCES configuration can be find here: http://forge.ipsl.jussieu.fr/igcmg/wiki/PerformancesIPSLCM6