IFS#
Model description#
Contact#
Peter Dueben and Nils Wedi, European Centre for Medium-Range Weather Forecasts (ECMWF), UK
Data structure#
Horizontal#
Here we offer two runs with TCo1279 (~9km) (ECMWF’s operational configuration) and TCo2559 (~4km) following the Dyamond protocol.
Vertical#
The runs use 137 vertical levels (data provided from level 137 to level 25). The number of grid columns is 26 306 560 (4km) and 6 599 680 (9km). The vertical discretisation uses hybrid vertical levels defined as A(eta) + B(eta)*p_s, with A, B ixed defined parametersand where p_s is the provided surface pressure. Pressure on model levels needs to be calculated by the given formula.
Data#
gg_uv_mars_out_ml_vor_div_sh.*.grib, output interval: PT03h (levels 125-137)
Please ignore the dates indicated in these files and concentrate on step for time.
u |
velocity u |
v |
velocity v |
mars_out.*, output interval: PT01h
ci |
sea ice area fraction |
asn |
snow albedo |
rsn |
snow density |
sst |
sea surface temperature |
istl1 |
ice temperature layer 1 |
istl2 |
ice temperature layer 2 |
istl3 |
ice temperature layer 3 |
istl4 |
ice temperature layer 4 |
swvl1 |
volumetric soli water layer 1 |
swvl2 |
volumetric soli water layer 2 |
swvl3 |
volumetric soli water layer 3 |
swvl4 |
volumetric soli water layer 4 |
es |
snow evaporation |
smlt |
snowmelt |
dsrp |
direct solar radiation |
lspf |
large-scale precipitation fraction |
uvb |
downward UV radiation at the surface |
par |
photosynthetically active radiation at the surface |
cape |
convective available potential energy |
tclw |
total column liquid water |
tciw |
total column cloud ice water |
z |
geopotential |
tcw |
total column water |
tcwv |
total column water vapour |
stl1 |
soil temperature level 1 |
Sd |
solar duration |
lsp |
large-scale precipitation |
cp |
convective precipitation |
tp |
total precipitation |
sf |
snowfall |
bld |
boundary layer dissipation |
sshf |
surface sensible heat flux |
slhf |
surface latent heat flux |
chnk |
Charnock |
msl |
mean sea level pressure |
blh |
boundary layer height |
tcc |
total cloud cover |
10 u |
10m zonal wind |
10 v |
10m meridional wind |
2 t |
2m temperature |
2d |
2 metre dewpoint temperature |
ssrd |
surface solar radiation downwards |
stl2 |
soil temperature level 2 |
lsm |
land sea mask |
strd |
surface thermal radiation downwards |
ssr |
sub-surface runoff |
str |
surface net thermal radiation |
tsr |
top net solar radiation |
ttr |
top net thermal radiation |
ewss |
eastward turbulent surface stress |
nsss |
northward turbulent surface stress |
e |
evaporation |
stl3 |
soil temperature level 3 |
lcc |
low cloud cover |
mcc |
medium cloud cover |
hcc |
high cloud cover |
sund |
sunshine duration |
lgws |
eastward gravity wave surface stress |
mgws |
northward gravity wave surface stress |
gwd |
gravity wave dissipation |
src |
skin reservoir content |
ro |
runoff |
tsrc |
top net solar radiation |
ttrc |
top net thermal radiation |
ssrc |
surface net solar radiation |
strc |
surface net thermal radiation |
skt |
skin temperature |
stl4 |
soil temperature level 4 |
tsn |
temperature of snow layer |
fal |
forecast albedo |
fsr |
forecast surface roughness |
flsr |
forecast logarithm of surface roughness for heat |
iews |
instantaneous eastward turbulent surface stress |
inss |
instantaneous northward turbulent surface stress |
ishf |
instantaneous surface sensible heat flux |
ie |
instantaneous moisture flux |
vimd |
vertically integrated moisture divergence |
tisr |
TOA incident solar radiation |
sro |
surface runoff |
ssro |
sub-surface runoff |
tcrw |
total column rain water |
tcsw |
total column snow water |
cin |
convective inhibition |
kx |
k index |
totalx |
total totals index |
vis |
visibility |
i10fg |
instantaneous 10 metre wind gust |
pev |
potential evaporation |
fzra |
accumulated freezing rain |
ilspf |
instantaneous large-scale surface precipitation fraction |
crr |
convective rain rate |
lsrr |
large scale rainfall rate |
csfr |
convective snowfall rate water equivalent |
lssfr |
large scale snowfall rate water equivalent |
ptype |
precipitation type |
mars_out_ml_moist.*, output interval: PT03h
q |
specific humidity |
clwc |
specific cloud liquid water content |
ciwc |
specific cloud ice water content |
mars_out_pl_gg.*, output interval: Pt1h
w |
vertical velocity m/s |
r |
relative humidity |
mars_out_sfc_ps_orog_gg.*, output interval: Pt3h
lnsp |
logarithm of surface pressure |
|---|---|
geopotential |
Topography stored as geopotential (z). Multiply with 1/g ? m |
gg_mars_out_ml_upper_sh.*.grib, output interval: Pt3h (levels 125-137)
t |
temperature |
vertical velocity/omega in Pa/s |
Initialisation and Boundary conditions#
Soil Initialisation#
Initial soil data from the ECMWF IFS model state at the initialisation date are time and spatially interpolated.
Input Data#
Input data are extracted from mars for the specified start date 2016080100.
Treatment of SST and Sea Ice#
Daily updated SST/CI from ECMWF analysis is used.