wrfchem / std

Description

VERSION HISTORY

2021-10-06 freum Moved copying namelist to native2inputs 2021-09-20 freum Removed CTDAS’ flux_optim etc. (now handled by CIF yml) 2021-09-09 freum Misc updates

  • Adapted ini_data to run WRF with preprocessed input data

  • Replaced input argument run_dir with plugin’s workdir

2021-08-17 freum Initial version
  • Based on LMDZ and TM5 plugins and CTDAS-WRF obsoper_wrfchem.rc

  • Some behavior is preliminary, e.g.: - Mandatory to fill ensemble member variables in wrfinput_d<nn> and wrfbdy_d01 in preprocessing instead of in cif - Mandatory to create wrfchemi-files in preprocessing

  • input_arguments that might need to be added (as in CTDAS’ obsoper_wrfchem.rc): - obs.column.footprint_samples_dim - no_rerun_wrf - save_wrf_step

Yaml arguments

The following arguments are used to configure the plugin. pyCIF will return an exception at the initialization if mandatory arguments are not specified, or if any argument does not fit accepted values or type:

Mandatory arguments

source_dir: (mandatory)

Directory like WRF/run/, including output of real.exe, i.e. wrfbdy_d01 and wrfinput_d%02d, both already containing tracer values.

Necessary files are linked/copied (as needed) from source_dir at the start of running CIF. Files that are already present in run_dir are skipped.

namelist.input is copied separately from path specified in argument namelist_input_file. Flux files are handled by the flux plugin.

accepted type: str

namelist_input_file: (mandatory)

Path to namelist.input. Namelist settings that are controlled (overwritten) by CIF:

  • run period (start_year, …, end_second)

  • restart flag / interval (restart, restart_interval)

Namelist settings necessary to run with CIF:
  • io_style_emissions = 2 # explicit fluxes per timestep

  • io_form_auxinput5 = 2 # netCDF

  • auxinput5_inname = wrfchemi_d<domain>_<date>

  • write_hist_at_0h_rst = .true.

  • chem_opt = 17

  • emiss_opt = 17

Recommended namelist settings:
  • Consider quilting to speed up i/o of history files

  • I only tested frames_per_auxinput5 = 1. The code is written to handle other cases as well, but this would have to be tested.

  • Use nudging to keep WRF meteorology close to the driving meteorology (e.g. spectral nudging)

accepted type: str

Optional arguments

autoflush: (optional): False

Cleans big temporary files when the simulation is done. Triggers the function flushrun of the model if available

accepted type: bool

mpirun: (optional):

Command that calls ./wrf.exe. Default is empty string, which is useful e.g. for interactive runs of small testcases. For using slurm inside a cif job, not sure about the format yet. Ultimately want something in the format srun -n 72 -t 10:00:00 - but need to read the resources the cif job has.

accepted type: str

Requirements

The current plugin requires the present plugins to run properly:

Requirement name

Requirement type

Explicit definition

Any valid

Default name

Default version

domain

Domain

False

False

wrfchem

std

flux

DataStream

False

False

wrfchem

std

latcond

DataStream

True

False

wrfchem

icbc

inicond

DataStream

True

False

wrfchem

icbc

Yaml template

Please find below a template for a Yaml configuration:

 1model:
 2  plugin:
 3    name: wrfchem
 4    version: std
 5    type: model
 6
 7  # Mandatory arguments
 8  source_dir: XXXXX  # str
 9  namelist_input_file: XXXXX  # str
10
11  # Optional arguments
12  autoflush: XXXXX  # bool
13  mpirun: XXXXX  # str