FLEXPART species

The species (chemical elements) released during a simulation are specified as integer numbers in the release_species parameter in flexpart_run(). The integer ID of the individual species are taken from the name of the species definition files. These have to be located in the directory defined

• via the users_species_path parameter in flexpart_run()

• or if it is left blank (this is the default value) Metview will use the MV_FLEXPART_SPECIES environment variable.

The species distributed with FLEXPART

Folder option/SPECIES in the FLEXPART distribution contains a default set of species definitions. Here each species is represented by a file called SPECIES_NNN , where NNN is the integer ID of the given species.The table below summarises what species are available:

File	Des cription		File	Des cription		File	D escription
SPE CIES_001	TRACER		SPE CIES_011	NH3		SP ECIES_021	Xe-133
SPE CIES_002	O3		SPE CIES_012	SO4-areo		SPE CIES_022:	CO
SPE CIES_003	NO		SPE CIES_013	SO4-areo		SP ECIES_024	AIRTRACER
SPE CIES_004	NO2		SPE CIES_014	I2-13		SP ECIES_025	A ERO-TRACER
SPE CIES_005	HNO3		SPE CIES_015	I-131
SPE CIES_006	HNO2		SPE CIES_016	Cs-137
SPE CIES_007	H2O2		SPE CIES_017	Y-91
SPE CIES_008	SO2		SPE CIES_018	Ru-106
SPE CIES_009	HCHO		SPE CIES_019	Kr-85
SPE CIES_010	PAN		SPE CIES_020	Sr-90

At ECMWF

The species are located in the directory specified by environment variable MV_FLEXPART_SPECIES. The contents of this directory is the same as that of folder option/SPECIES in the FLEXPART distribution.

At other sites

Instructions to setup the species path can be found here.

Using your own definitions

If you want create your own species definition you need make a copy of this directory and add your own species to it. Then set the path in User Species Path so that FLEXPART could pick up your definitions.