IFS HRES input fields for FLEXPART (Europe)

Domain: area = 65/-10/35/47 (N/W/S/E)

Grid: use a consistent grid across levtypes (e.g., 0.25/0.25 or 0.1/0.1)

Steps: typically 0/to/90/by/1 (request ≥ 2 steps)

Constants

• levtype: sfc · type: fc · levels: — · step: 0

short	code	description	units
z	129	Geopotential height	m²/s²
lsm	172	Land–sea mask	—
sdor	160	Std. dev. of orography	—

Surface forecast fields

• levtype: sfc · type: fc · levels: — · steps: 0/to/90/by/1

short	code	description	units (input → preproc)
sp	134	Surface pressure	Pa → Pa
sd	141	Snow depth	m → m
tcc	164	Total cloud cover	— → —
10u	165	10 m eastward wind component	m s⁻¹ → m s⁻¹
10v	166	10 m northward wind component	m s⁻¹ → m s⁻¹
2t	167	2 m temperature	K → K
2d	168	2 m dewpoint temperature	K → K
lsp	142	Large-scale precipitation (accum)	m → mm h⁻¹ (de-accum)
cp	143	Convective precipitation (accum)	m → mm h⁻¹ (de-accum)
sshf	146	Surface sensible heat flux (accum)	J m⁻² → W m⁻² (rate)
ssr	176	Surface net shortwave rad. (accum)	J m⁻² → W m⁻² (rate)
ewss	180	Eastward turb. surface stress (accum)	N·s m⁻² → N m⁻² (rate)
nsss	181	Northward turb. surface stress (accum)	N·s m⁻² → N m⁻² (rate)

Note

“accum” fields are converted to rates by differencing consecutive steps and dividing by elapsed time.

Model-level forecast fields

• levtype: ml · type: fc · levelist: 40/to/137 · steps: 0/to/90/by/1

short	code	description	units
u	131	Eastward wind (model levels)	m s⁻¹
v	132	Northward wind (model levels)	m s⁻¹
t	130	Temperature (model levels)	K
q	133	Specific humidity (model levels)	kg/kg

Vertical motion (eta levels)

• levtype: ml · type: fc · levelist: 1/to/137 · steps: 0/to/90/by/1

short	code	description	units
etadot	77	Eta-coordinate vertical velocity	s⁻¹

Hybrid coefficients: ak, bk are derived from GRIB pv metadata when available.