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Resources for input files

Where do you get the input files?

Distributed with LMDZ

Template .def and .xml files are distributed with LMDZ source files, in directory DefLists. For example:

  • physiq.def_AR4: physics used for AR4 (old physics)
  • physiq.def_NPv3.2: new physics of CMIP5
  • physiq.def_NPv6.1.3.newt2mq2m: physics of CMIP6

More details on the history of LMDZ physical parameterizations in the presentation LMDZ configurations: uses and tuning by F. Hourdin.

On the web and on supercomputing centers

You can find input files required by ce0l, as well as forcing data (ozone, aerosols, solar irradiance) used for CMIP5 and CMIP6, mainly NetCDF files, on a Thredds data server. If you use LMDZ at the national supercomputing centers IDRIS or TGCC, or at the IPSL computing center, then the same files are available there, so you do not need to download them. At the four locations, the Thredds server and the three supercomputing centers, the tree of files is the same. We will refer to the root of this tree of files as R_IN in the following paragraphs. On the three supercomputing centers, the value of R_IN is:

  • /gpfswork/rech/psl/commun/IGCM at IDRIS
  • /ccc/work/cont003/igcmg/igcmg/IGCM at TGCC
  • /projsu/igcmg/IGCM on spirit (IPSL machines)

See also: Repository for shared files.

Boundary conditions

In subdirectory:

$R_IN/ATM/LIMIT/AMIP.v20230512/original/360x180

you will find sea ice and sea surface temperature from 1870 to 2022, from input4MIPS (variables siconcbcs and tosbcs)

In subdirectory:

$R_IN/ATM/INPUT_CE0L

you will find:

  • landiceref_GA_HR.new.nc, recommended for landiceref.nc
  • Relief_GMTED2010_15n015_00625deg_plus_GA.nc, recommended for Relief.nc
  • Albedo.nc
  • Rugos.nc

Initial state

In subdirectory:

$R_IN/ATM/INPUT_CE0L

you will find ECDYN.nc and ECPHY.nc for a single date. If you need another date, see: Création d'un fichier ECDYN (from ERA interim). Useful for "transpose AMIP" runs or weather forecast runs.

Strataer

For the Strataer model, climatology of precursor gas species:

$R_IN/ATM/STRATAERO/Climato_OCS_SO2

Aerosol plumes

For use with flag_aerosol=7. See directory:

$R_IN/ATM/AEROSOLS/PLUME

Forcing data for CMIP 5

A lot of data, for pre-industrial, historical or future simulations (with different scenarios).

Ozone

$R_IN/ATM/OZONE/HYBRIDE/original/v2.$scenario/tro3_${year}.new.nc

(see definition of R_IN above) for the scenarios:

  • clim: historical then RCP 8.5
  • RCP26, RCP45, RCP60

See Information on ozone files.

Aerosols

$R_IN/ATM/LMD$resolution/AR5/$scenario/aerosols_11YearsClim_${year}_v5.nc

for the resolutions:

  • 128 × 118
  • 128 × 88
  • 144 × 142 (directory LMD144142, not LMD144X142)
  • 280 × 280
  • 96 × 95 (directory LMD9695)

And for the scenarios: HISTORIQUE, RCP26, RCP45, RCP60, RCP85, esm2_experiment. Each file contains all aerosol types. 855 for aerosols.nat.nc. See Informations on runs of LMDZ-Orchidée-Inca which produced aerosol files.

Forcing data for CMIP6

See information on greenhouse gases, tropospheric aerosols, solar irradiation, ozone, stratospheric aerosols and land use.

Ozone

Ozone input files for ce0l:

$R_IN/ATM/OZONE/UReading/historical.v20160711.v2/original
$R_IN/ATM/OZONE/UReading/Scenarios

(see definition of R_IN above). Origin: input4MIPs, variable vmro3. See information on the processing of ozone files at IPSL and the scripts producing ozone files

Aerosols

Tropospheric aerosol input files from INCA:

$R_IN/ATM/AEROSOLS/CMIP6/v1/$resolution/L79

aerosols1850_from_inca.nc for aerosols.nat.nc, aerosols1995_from_inca.nc for aerosols1980.nc (original resolution is 144×142×79, other resolutions by regridding). See information on the processing of aerosol emission at IPSL and the runs producing aerosol forcing.

For stratospheric aerosols (used when you set flag_aerosol_strat=2), look in:

$R_IN/ATM/STRATAERO/CMIP6/v3

The files tau[ls]wstrat.2D.YYYY.nc in this directory contain opacity for LMDZ cells for given latitude grid and number of vertical levels, in the 6 shortwave bands and the 16 longwave bands of RRTM. These are computed from extinction per unit length data. The files are available for the period from 1850 to 2023. Note there is also a post-CMIP6 version of these files in directory v4.

If you need a latitude grid or a number of vertical levels other than those available at the above location, you can download the program which prepares the input files for stratospheric aerosols:

svn checkout https://forge.ipsl.jussieu.fr/igcmg/svn/TOOLS/CMIP6_FORCING/AER_STRAT

or you can browse it with Trac. Ask for the identifier and password to a member of IPSL.

Solar

$R_IN/ATM/SOLAR/CMIP6/v3.2corr

See information on input files.