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:

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

read_background: (optional): False

Read sensitivity to the background according to FLEXPART

accepted type: bool

read_surface_sensitivity: (optional): True

Read sensitivity to the surface fluxes according to FLEXPART

accepted type: bool

footprint_type: (optional): FLEXPART

Type of footprints to read

accepted values:

  • FLEXPART: Footprints generated by FLEXPART

  • STILT: Footprints generated by STILT

period: (optional): 1MS

Length of periods along which FLEXPART simulations are split

accepted type: str

subperiod: (optional):

Complementary to period if inputs should be at a better resolution than period

accepted type: str

numscale: (optional): 1000000000000.0

Scaling factor to convert from footprint native resolution to`ppm / (ng/m2/s)`

accepted type: float

coeff: (optional): 0.001

Conversion coefficient to convert from native output unit to ppb/ppt/ppm, etc. A coefficient of 1 returns ppm; 1e-3 returns ppb, etc.

accepted type: float

mmair: (optional): 28.97

Molar mass of dry air

accepted type: float

footprint_dir_format: (optional): %Y%m

Structure for the footprints per stations. The format can use date formatting

accepted type: str

footprint_date_format: (optional): %Y%m%d%H%M%S

Date format for converting observation dates to footprint data

accepted type: str

file_nest_format: (optional):

Format of the footprint file names.


It is possible to dynamically include the name of the station in file_nest_format (but also in footprint_date_format and footprint_dir_format.

To do so, simply include the string {stat} in the variable.

For instance, if file_nest_format is footprint_{stat}_%Y%m.nc, it will be replaced by footprint_PAL_201001.nc for the station PAL for the month of January 2010.

accepted type: str

run_dir_nest: (optional):

Directory where footprints for the nested domain are stored. In the case of a non-nested domain, this argument is used for the overall domain.


The expected structure of the footprint folder is:

run_dir_nest ├── station_ID#1 │ └── footprint_dir_format │ └── file_nest_format └── station_ID#1

└── footprint_dir_format

└── file_nest_format

accepted type: str

run_dir_glob: (optional):

Same as run_dir_nest for the outer domain.


For non-nested domains, run_dir_glob is used by default to read footprints. It is possible to force reading the inside domain with force_read_nest

accepted type: str

run_dir_bg: (optional):

Same as run_dir_nest for reading the influence of the background.

accepted type: str

release_shift: (optional): 0H

Releases start X time before observation starts. Accepts pandas date syntax

accepted type: str

footprint_format: (optional): bin

Format of FLEXPART output files ‘grid_time’

accepted values:

  • bin: standard FLEXPART outputs

  • nc: netCDF adaptation of FLEXPART outputs

force_read_nest: (optional): False

Use it to force using the nested format even when simulations where nested, but the CIF uses them as non-nested. It has no impact for nested simulations, but for non-nested, if the original FLEXPART simulation was nested and force_read_nest is False, the CIF will use the outer domain by default, which may lead to shape issues

accepted type: bool

dump_debug: (optional): False

Dumps intermediate datastores (contributions from nested fluxes, global fluxes and initial conditions) in the model sub-directory

accepted type: bool

backward_trajdays: (optional):

Duration of backward trajectories. If not specified, automatically inferred from the domain information.


This argument should be explicitly specified only with STILT

accepted type: str

ref_header_ID: (optional)

Name of the station to be used to initialize the header for the model footprints. If not specified, The first station of the observation files will be used.

accepted type: str

nthreads: (optional): 1

Number of threads to read in parallel grid files. There is a balance to find between to few threads which do not optimize anything and too many threads that overload I/O.

accepted type: int

flexversion: (optional): 10.4

Version of FLEXPART used to generate footprints

accepted type: float


The current plugin requires the present plugins to run properly:

Requirement name

Requirement type

Explicit definition

Any valid

Default name

Default version













Yaml template

Please find below a template for a Yaml configuration:

 2  plugin:
 3    name: FLEXPART
 4    version: std
 5    type: model
 7  # Optional arguments
 8  autoflush: XXXXX  # bool
 9  read_background: XXXXX  # bool
10  read_surface_sensitivity: XXXXX  # bool
11  footprint_type: XXXXX  # FLEXPART|STILT
12  period: XXXXX  # str
13  subperiod: XXXXX  # str
14  numscale: XXXXX  # float
15  coeff: XXXXX  # float
16  mmair: XXXXX  # float
17  footprint_dir_format: XXXXX  # str
18  footprint_date_format: XXXXX  # str
19  file_nest_format: XXXXX  # str
20  run_dir_nest: XXXXX  # str
21  run_dir_glob: XXXXX  # str
22  run_dir_bg: XXXXX  # str
23  release_shift: XXXXX  # str
24  footprint_format: XXXXX  # bin|nc
25  force_read_nest: XXXXX  # bool
26  dump_debug: XXXXX  # bool
27  backward_trajdays: XXXXX  # str
28  ref_header_ID: XXXXX  # str
29  nthreads: XXXXX  # int
30  flexversion: XXXXX  # float