Namelist
Recommended ICON Namelist Settings
It is necessary for the user to choose the ICON settings carefully. Part of the values listed in are recommended to obtain a stable ICON-ART simulation with scientifically reasonable results. Another part is necessary to enable ART features like aerosol-cloud-interactions.
| Parameter | Value | Namelist | Description |
|---|---|---|---|
| dtime | - | run_nml | If facing stability problems, it is recommended to use a shorter time step as recommended by operational setups (e.g. 0.5*dtime). |
| inwp_gscp | 6 | nwp_phy_nml | In order to enable aerosol-cloud-interactions within ICON-ART, you have to specify this. Note, that you will still need to set iart_aci_warm and iart_aci_cold. |
| irad_aero | 6 | radiation_nml | aerosol optical properties are taken from climatology |
| 9 | optical properties depend on aerosol concentrations (set iart_ari = 1 in art_nml ) |
One caveat in the Table above is that inwp_gscp requires ICON to use the 2-moment scheme.
ART Namelists
ICON-ART has an own namelist to modify the setup of ART simulations at runtime. The main switch for ART, lart, is located inside run_nml. The namelist for the other ART switches is called art_nml.
A naming convention is used in order to show the type of data. An INTEGER namelist parameter starts with iart_, a REAL namelist parameter starts with rart_, a LOGICAL namelist parameter starts with lart_, and a CHARACTER namelist parameter starts with cart_.
The ICON-ART namelist is located in the module src/namelists/mo_art_nml.f90. General namelist parameters are listed and explained within . Namelist parameters for ART input are listed within . Namelist parameters related to atmospheric chemistry are listed within . Namelist parameters related to aerosol physics are listed within . Namelist parameters related to feedback processes between aerosols and meteorological variables are listed in . Finally, namelist parameters related to physics parameterizations in ICON are listed in .
| Name | function |
|---|---|
| General Variables | |
iart_init_aero
|
Initialization of aerosol species |
iart_init_gas
|
Initialization of gaseous species |
lart_diag_out
|
Enable output of diagnostic fields |
lart_pntSrc
|
Enables point sources |
lart_emiss_turbdiff
|
Switch if emissions should be included as surface flux condition |
cart_input_folder
|
Absolute Path to ART Input Files |
cart_io_suffix
|
user given suffix instead of automatically generated grid number |
| Atmospheric Chemistry | |
lart_chem
|
Main switch to enable chemistry |
lart_chemtracer
|
Switch for parametrised chemtracers |
lart_mecca
|
Switch for MECCA chemistry |
lart_psc
|
Switch for computation of PSCs |
cart_vortex_init_date
|
Date of vortex initialization |
cheminit_file(max_dom)
|
Path to chemical initialization file |
cart_cheminit_coord
|
Path to chemical initialization coordinate file |
cart_cheminit_type
|
Type of chemical initialization coordinate file |
| XML configuration | |
cart_chemtracer_xml
|
Path to XML file for parametrised chemtracers |
cart_mecca_xml
|
Path to XML file for MECCA tracers |
cart_aerosol_xml
|
Path to XML file for aerosol tracers |
cart_modes_xml
|
Path to XML file for modes |
cart_pntSrc_xml
|
Path to XML file for point sources |
cart_diagnostics_xml
|
Path to XML file for aerosol diagnostics |
cart_emiss_xml_file
|
Path to XML file for emission metadata |
cart_ext_data_xml
|
Path to XML file for metadata of datasets prescribing tracers |
cart_coag_xml
|
Path to XML file for coagulation processes |
| Atmospheric Aerosol | |
lart_aerosol
|
Main switch for the treatment of atmospheric aerosol |
iart_seasalt
|
Treatment of sea salt aerosol interaction with radiation |
iart_dust
|
Treatment of mineral dust aerosol interaction with radiation |
iart_anthro
|
Treatment of anthropogenic aerosol |
iart_fire
|
Enables treatment of wildfire aerosol |
iart_volcano
|
Enables treatment of volcanic ash aerosol |
iart_isorropia
|
Treatment of aerosol gas partitioning |
iart_nonsph
|
Treatment of nonspherical particles |
iart_pollen
|
Treatment of pollen |
iart_radioact
|
Treatment of radioactive particles |
cart_volcano_file
|
Absolute path + filename of input file for volcanoes |
cart_radioact_file
|
Absolute path + filename of input for radioactive emissions |
| Feedback Processes | |
iart_aci_warm
|
Nucleation of aerosol to cloud droplets |
iart_aci_cold
|
Nucleation of aerosol to cloud ice |
iart_ari
|
Direct interaction of aerosol with radiation |