CERA-20C (Laloyaux et al., 2016) est une réanalyse couplée produite par ECMWF couvrant le 20e siècle (1901-2010). Elle est basée sur le système d'assimilation CERA qui assimile seulement les observations de pressions de surface et de vents de surface sur l'océan ainsi que les profils de salinités et de température de l'océan. Bien qu'étant une analyse ensembliste à la base, seul le membre contrôle est disponible dans la présente base de données.

Period : 190101 - 201012
Horizontal grid : 288x145 (1.25 deg) Global Lat/lon
Vertical info : 37 pressure levels from 1 hPa to 1000 hPa
Data source : https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/cera-20c
Documentation : https://www.ecmwf.int/en/newsletter/150/meteorology/cera-20c-earth-system-approach-climate-reanalysis

...

Location : ~data/Driving_data/Offline/ERA-Interim_0.75/3h_Forecast
Data source : http://apps.ecmwf.int/datasets

3-hourly forecast, 2-D NetCDF (only year 2019 for now)

NAME	DESCRIPTION	UNIT
tp	Total precipitation	m

Location : ~archive/REANALYSES/ERA-Interim/3h
Data source : http://apps.ecmwf.int/datasets

2-D monthly mean fields

Period : 197901 - 201412
Horizontal grid : 481x241 (0. monthly mean fieldsPeriod : 197901 - 201412
Horizontal grid : 481x241 (0.75 deg) B grid (CMC/RPN)
Data source : http://apps.ecmwf.int/datasets/data/interim-full-moda/

...

ERA5 (Hersbach et al., 2019) est la dernière version des réanalyses de ECMWF. Plusieurs sources d’informations sont assimillées dans le cadre de la réanalyse ERA5 comme les observations de stations de surface, les observations satellitaires, les METAR, etc. Les données ont été téléchargés à partir du Climate Data Store de Copernicus (C3S, 2017).

2-D fields (RPN only)

TT	2 metre temperature [°C]	1-hourly	analysis
T5	2m min temperature [°K]	daily	derived from 1h 2m TT analysis
T9	2m max temperature [°K]	daily	derived from 1h TT 2m analysis
ES TD	2 metre dewpoint temperature [°C]	1-hourly	analysis
PC	Convective precipitation [m/s]	1-hourly	forecast
PR	Total precipitation [m/s]	1-hourly	forecast
UU	10 metre U wind component [knots]	1-hourly	analysis
VV	10 metre V wind component [knots]	1-hourly	analysis
EVAP	Evaporation [m/s of water equivalent]	1-hourly	forecast
DN	Snow density [kg m-3]**	1-hourly	analysis
SWE	Snow water equivalent [m of water equivalent]	1-hourly	analysis
SN	Snowfall [m/s of water equivalent]	1-hourly	forecast
J8	Skin temperature [K]	1-hourly	analysis
PN	Mean sea level pressure [hPa]	1-hourly	analysis
P0	Surface pressure [hPa]	1-hourly	analysis
ro	Runoff [m]	1-hourly	forecast
TRAF	Surface runoff [mm/s]	1-hourly	forecast
TDRA	Sub-surface runoff [mm/s]	1-hourly	forecast
AV	Surface latent heat flux [W/m2]**	1-hourly	forecast
AH	Surface sensible heat flux [W/m2]**	1-hourly	forecast
AS	Surface net solar radiation [W/m2]**	1-hourly	forecast
AI	Surface net thermal radiation [W/m2]**	1-hourly	forecast
ABE	Convective available potential energy Available buoyant energy [J/kg]	1-hourly	analysis
IH	Total column water vapour [kg/m2]**	1-hourly	analysis
GZ	Geopotential at 500 hPa [dm]	1-hourly	analysis
TM	Sea surface temperature [K]	daily	analysis
LG	Sea ice area fraction [0-1]	daily	analysis

...

Location: RPN format : ~data/ReAnalysis/ERA5/2D_Fields

2-D fields (NetCDF only) (hourly fields)

Fields are in monthly files with one variable per file. Files are compressed with a deflate level of 6 and chunked to the grid dimension. Please note that as 04-03-2021 01 October 2024 all months in the database from 202101 up to 202102 are considered ERA5T.Please note that even if the output 202405 were downloaded and are the final version of ERA5.

Please note :

msl, sd, tp, t2m, u10, v10, i10fg, z_500, sst and siconc are available from 194001
even if the output of sst and siconc is available hourly from CDS API, it only change one time a day, so it was downloaded only at 12Z.

...

Due to interpolation from the gaussian grid to the global latlon grid by ECMWF and also due a precision loss when packing the fields into an integer, it can happen to have very small negative precipitation values.
- https://confluence.ecmwf.int/display/EMOS/Precipitation
- https://confluence.ecmwf.int/display/UDOC/Why+are+there+sometimes+small+negative+precipitation+accumulations+-+ecCodes+GRIB+FAQ

2 metre temperature [K]

t2m	1-hourly	analysis	d2m	2 metre dewpoint temperature [K]	1-hourly	analysis
cp d2m	Convective precipitation [m2 metre dewpoint temperature [K]	1-hourly	forecast analysis	tp
q2m	2 metre specific humidity¹ [kg/kg Total precipitation [m]	1-hourly	forecast analysis
u10 r2m	10 metre U wind component [m/s 2 metre relative humidity² [%]	1-hourly	analysis
v10 cape	10 metre V wind component [m/sConvective available potential energy [J kg-1]**	1-hourly	analysis
e cp	Evaporation Convective precipitation [m of water equivalent]	1-hourly	forecast
rsn tp	Snow density Total precipitation [kg m-3]**	1-hourly	analysis forecast
sd ptype	Snow depth (snow water equivalent) [m of water equivalent]Precipitation type [dimensionless]	1-hourly	analysis forecast
sf u10	Snowfall 10 metre U wind component [m of water equivalent/s]	1-hourly	forecast analysis
skt v10	Skin temperature [K10 metre V wind component [m/s]	1-hourly	analysis
msl i10fg	Mean sea level pressure [PaInstantaneous 10 metre wind gust [m/s]	1-hourly	analysis forecast
fg10	Maximum 10m wind gust since previous post-processing[m/s	sp	Surface pressure [Pa]	1-hourly	analysis forecast
ro e	Runoff Evaporation [m ]of water equivalent]	1-hourly	forecast
sro rsn	Surface runoff Snow density [kg m-3]**	1-hourly	forecast analysis
ssro sd	Sub-surface runoff Snow depth (snow water equivalent) [m of water equivalent]	1-hourly	forecast analysis
slhf sf	Surface latent heat flux Snowfall [J m-2m of water equivalent]**	1-hourly	forecast
sshf smelt	Surface sensible heat flux Snowmelt [J m-2m of water equivalent]**	1-hourly	forecast
ssr skt	Surface net solar radiation [J m-2]Skin temperature [K]**	1-hourly	forecast analysis
str stl1	Surface net thermal radiation [J m-2Soil temperature level 1 [K]**	1-hourly	forecast analysis
cape stl2	Convective available potential energy [J kg-1Soil temperature level 2 [K]**	1-hourly	analysis
tcwv msl	Total column water vapour [kg m-2Mean sea level pressure [Pa]**	1-hourly	analysis
z sp	Geopotential at 500 hPa (z_500) [m2/s2Surface pressure [Pa]	1-hourly	analysis
sst ro	Sea surface temperature Runoff [Km]	daily 1-hourly	analysis forecast
siconc sro	Sea ice area fraction [%Surface runoff [m]	daily 1-hourly	analysis forecast

...

SST & sea ice fraction (RPN only)

Even though these fields are available 1-hourly, they change over ocean only once a day between 22Z and 23Z. Therefore we only have these fields once per day at 12Z.

...

ssro	Sub-surface runoff [m]	1-hourly	forecast
slhf	Surface latent heat flux [J m-2]**	1-hourly	forecast
sshf	Surface sensible heat flux [J m-2]**	1-hourly	forecast
mslhf	Mean surface latent heat flux [W m-2]**	1-hourly	forecast
msshf	Mean surface sensible heat flux [W m-2]**	1-hourly	forecast
ssr	Surface net solar radiation [J m-2]**	1-hourly	forecast
str	Surface net thermal radiation [J m-2]**	1-hourly	forecast
ssrd	Surface solar radiation downwards [J m-2]**	1-hourly	forecast
strd	Surface thermal radiation downwards [J m-2]**	1-hourly	forecast
ttr	Top net long-wave (thermal) radiation [J m-2]**	1-hourly	forecast
tcc	Total cloud cover [0-1]	1-hourly	analysis
tcwv	Total column water vapour [kg m-2]**	1-hourly	analysis
vimd	Vertically integrated moisture divergence [kg m-2]**	1-hourly	forecast
w_500	Vertical velocity at 500 hPa [Pa s-1]**	1-hourly	analysis
z_500	Geopotential at 500 hPa [m2/s2]	1-hourly	analysis
sst	Sea surface temperature [K]	daily	analysis
siconc	Sea ice area fraction [0-1]	daily	analysis

¹q2m was computed from d2m and sp with Teten's formula using equations 7.4 and 7.5 from Part IV, Physical processes section (Chapter 7, section 7.2.1b) in the documentation of the IFS for CY41R2

²r2m was computed from d2m and t2m with Teten's formula using equation 7.5 from Part IV, Physical processes section (Chapter 7, section 7.2.1b) in the documentation of the IFS for CY41R2

Location:
UQAM:
NetCDF format: ~archive/REANALYSES/ERA5/1h

2-D fields (NetCDF only) (daily fields)

Daily fields are not directly available from ERA5. The daily minimum, maximum and average of the instantaneous hourly fields were computed with [00Z,23Z] of a given day. The data is available from 1940.

tavg	2 metre daily average temperature [K]	daily	analysis
tmax	2 metre daily maximum temperature [K]	daily	analysis
tmin	2 metre daily minimum temperature [K]	daily	analysis

Location:
UQAM:
NetCDF format: ~archive/REANALYSES/ERA5/daily

Invariant fields (NetCDF only)

Some invariant fields are dowloaded by user request. You can find a list of those downloaded fields below :

lsm	Land-sea mask [0-1]
z	Surface geopotential [m² s^-2]

Location:
UQAM:
NetCDF format: ~archive/REANALYSES/ERA5/Invariant_fields

SST & sea ice fraction (RPN only)

Even though these fields are available 1-hourly, they change over ocean only once a day between 22Z and 23Z. Therefore we only have these fields once per day at 12Z.

TM	sea surface temperature [°K]
GL	sea ice fraction [0-1]

Note: Units are given for RPN format. For units in NetCDF format check inside files!

Location:
    UQAM:
         RPN format      : ~data/ReAnalysis/ERA5/SST_SeaIce
    Beluga:
         RPN format      : ~winger/projects/rrg-laprise/GEM_Data/SST_SeaIce_degK/ERA5

3-D fields (RPN only)

1-hourly from 1979 to current. We keep adding recent months upon request.

The following fields are available on these pressure levels:

 1000, 975, 950, 925, 900, 875, 850, 825, 800, 775, 750, 700, 650, 600, 550, 500,
  450, 400, 350, 300, 250, 225, 200, 175, 150, 125, 100, 70, 50, 30, 20, 10, 7, 5, 3, 2, 1

TT	air temperature [°C]
HU	specific humidity [0-1]
GZ	geopotential [dm]
UU	u-wind [knots]
VV	v-wind [knots]

Note: Units are given for RPN format. For units in NetCDF format check inside files!

Location:
    UQAM:
         RPN format      : ~data/ReAnalysis/ERA5/Pilots
    Beluga:
         RPN format      : ~/projects/rrg-laprise/GEM_Data/Driving_data/ERA5

Storm tracking fields (RPN only)

Fields that can get used for storm tracking.

PN	sea level pressure [hPa]
PNS	smoothed sea level pressure [hPa]
VORT	relative vorticity at 850 hPa [1/s]
VORS	smoothed relative vorticity at 850 hPa [1/s]
UGEO	geostrophic u-wind at 500 hPa [m/s]
VGEO	geostrophic v-wind at 500 hPa [m/s]
UU	10m u-wind [knots]
VV	10m v-wind [knots]

Location:
UQAM: ~data/ReAnalysis/ERA5/Stormfields

ERA5.1

Period : 200001 to 200612
Horizontal grid : 0.25° global B grid (CMC/RPN) Temporal resolution : 1-hourly or daily (for SST/SIC)

ERA5 (Hersbach et al., 2019) est la dernière version des réanalyses de ECMWF. Plusieurs sources d’informations sont assimillées dans le cadre de la réanalyse ERA5 comme les observations de stations de surface, les observations satellitaires, les METAR, etc. Les données ont été téléchargés à partir du Climate Data Store de Copernicus (C3S, 2017). Une correction a été faites par ECMWF pour les années 2000 à 2006 dû à un biais froid dans la stratosphère. Voir https://www.ecmwf.int/en/elibrary/81149-global-stratospheric-temperature-bias-and-other-stratospheric-aspects-era5-and

3-D fields (RPN only)

1-hourly from 1979 to current. We keep adding recent months upon request.

The following fields are available on these pressure levels:

Note: Units are given for RPN format. For units in NetCDF format check inside files!

Location:
    UQAM:
         RPN format      : ~data/ReAnalysis/ERA5/SST_SeaIce
    Beluga:
         RPN format      : ~winger/projects/rrg-laprise/GEM_Data/SST_SeaIce_degK/ERA5

3-D fields (RPN only)

1-hourly from 1979 to current. We keep adding recent months upon request.

The following fields are available on these pressure levels:

 1000, 975, 950, 925, 900, 875, 850, 825, 800, 775, 750, 700, 650, 600, 550, 500,
  450, 400, 350, 300, 250, 225, 200, 175, 150, 125, 100, 70, 50, 30, 20, 10, 7, 5, 3, 2, 1

...

Note: Units are given for RPN format. For units in NetCDF format check inside files!

Location:
    UQAM:
         RPN format      : ~data/ReAnalysis/ERA5/Pilots:
    BelugaUQAM:
         RPN format            : ~/projects/rrg-laprise/GEM_Data/Driving_data/ERA5

ERA5 Preliminary backextension 1950-1978

Period : 195001 to 197812
Horizontal grid : 0.25° global Temporal resolution : 1-hourly for all variables except sst and siconc which are daily

ERA5 (Hersbach et al., 2019) est la dernière version des réanalyses de ECMWF. Plusieurs sources d’informations sont assimillées dans le cadre de la réanalyse ERA5 comme les observations de stations de surface, les observations satellitaires, les METAR, etc. Les données ont été téléchargés à partir du Climate Data Store de Copernicus (C3S, 2017). L'extension 1950-1978 est considérée comme étant préliminaire dû à un problème avec la vitesse des vents dans les cyclones tropicaux. L'utilisation de ces données pour l'étude des cyclones tropicaux n'est donc pas appropriée.

2-D fields (NetCDF only)

data/Driving_data/ERA5/ERA5.1

Beluga:
RPN format : ~/projects/rrg-adl561/GEM_Data/Driving_data/ERA5.1

SST & sea ice fraction (RPN only)

Even though these fields are available 1-hourly, they change over ocean only once a day between 22Z and 23Z. Therefore we only have these fields once per day at 12Z.

TM	sea surface temperature [°K]
GL	sea ice fraction [0-1]

Note: Units are given for RPN format. For units in NetCDF format check inside files!

Location:
UQAM:
RPN format : ~data/SST_SeaIce_degK/ERA5.1

Beluga:
RPN format : ~winger/projects/rrg-adl561/GEM_Data/SST_SeaIce_degK/ERA5.1

ERA5-Land

ERA5-Land (Muñoz Sabater, 2019) est une simulation hors-ligne du modèle de surface à 0.1° qui est forcé par les réanalyses ERA5. Il n’y a pas d’assimilation de données. Toutefois, les observations atmosphériques s’y retrouvent indirectement via le forçage. Ces données peuvent être très utiles dans des endroits où il y a peu d’observations au niveau de la surface. Les données ont été téléchargés à partir du Climate Data Store de Copernicus (C3S, 2019). En date du 19 avril 2024, les données jusqu'en 202312 sont issues de la version finale de ERA5-Landé

Period : 195001-202312
Spacial coverage :  global
Spacial resolution :  0.1°
Temporal resolution :  1-hourly

2-D fields (NetCDF only)

t2m	2 metre temperature [K
t2m	2 metre temperature [K]	1-hourly	analysis
d2m	2 metre dewpoint temperature [K]	1-hourly	analysis
cp	Convective precipitation [m]	1-hourly	forecast
tp	Total precipitation [m]	1-hourly	forecast
u10	10 metre U wind component [m/s]	1-hourly	analysis
v10	10 metre V wind component [m/s]	1-hourly	analysis
msl	Mean sea level pressure [Pa]	1-hourly	analysis
sd	snow depth (snow water equivalent) [m of water equivalent]	1-hourly	analysis
sf	Snowfall [m of water equivalent]	1-hourly	forecast
skt	Skin temperature [K]	1-hourly	analysis
ro	Runoff [m]	1-hourly	forecast
sro	Surface runoff [m]	1-hourly	forecast
ssro	Sub-surface runoff [m]	1-hourly	forecast
slhf	Surface latent heat flux [J m-2]**	1-hourly	forecast
sshf d2m	Surface sensible heat flux [J m-22 metre dewpoint temperature [K]**	1-hourly	forecast
ssr tp	Surface net solar radiation [J m-2Total precipitation¹ [m]**	1-hourly	forecast
tp_deaccum	Deaccumulated total precipitation² [mm	str	Surface net thermal radiation [J m-2]**	1-hourly	forecast
cape u10	Convective available potential energy [J kg-110 metre U wind component [m/s]**	1-hourly	analysis forecast
z v10	Geopotential at 500 hPa (z_500) [m2/s210 metre V wind component [m/s]	1-hourly	analysis forecast
sst e	Evaporation³ Sea surface temperature [K[m of water equivalent]	daily 1-hourly	analysis forecast
siconc	Sea ice area fraction [%]	daily	analysis

...

e_deaccum	Deaccumulated evaporation⁴ [mm]	1-hourly	forecast
sd	Snow depth (snow water equivalent) [m of water equivalent]	1-hourly	analysis
sde	Snow depth (physical snow depth) [m]	1-hourly	forecast
skt	Skin temperature [K]	1-hourly	analysis
ssrd	Surface solar radiation downwards⁵ [J m^-2]	1-hourly	forecast
ssrd_deaccum	Deaccumulated surface solar radiation downwards⁶ [W m^-2

ERA5-Land

ERA5-Land (Muñoz Sabater, 2019) est une simulation hors-ligne du modèle de surface à 0.1° qui est forcé par les réanalyses ERA5. Il n’y a pas d’assimilation de données. Toutefois, les observations atmosphériques s’y retrouvent indirectement via le forçage. Ces données peuvent être très utiles dans des endroits où il y a peu d’observations au niveau de la surface. Les données ont été téléchargés à partir du Climate Data Store de Copernicus (C3S, 2019)

Period : 198101-202011
Spacial coverage :  global
Spacial resolution :  0.1°
Temporal resolution :  1-hourly

2-D fields (NetCDF only)

t2m	2 metre temperature [K]	1-hourly	forecast
d2m	2 metre dewpoint temperature [K]	1-hourly	forecast
tp	Total precipitation [m]	1-hourly	forecast
u10	10 metre U wind component [m/s]	1-hourly	forecast
v10	10 metre V wind component [m/s]	1-hourly	forecast
sd	Snow depth (snow water equivalent) [m of water equivalent]	1-hourly	analysis
sde	Snow depth (physical snow depth) [m]	1-hourly	forecast
skt	Skin temperature [K]	1-hourly	analysis

¹tp is the total precipitation download directly from ERA5-Land which accumulate daily up to 00Z. tp at 00Z is then the total accumulation for the previous day.

²tp_deaccum is the deaccumulated total precipitation which was locally computed. The output of tp_deaccum at hZ is then the accumulated precipitation from ]h-1,h].

³e is the evaporation download directly from ERA5-Land which accumulate daily up to 00Z. tp at 00Z is then the total accumulation for the previous day.

⁴e_deaccum is the deaccumulated evaporation which was locally computed. The output of e_deaccum at hZ is then the accumulated evaporation from ]h-1,h].

⁵ssrd is the surface solar radiation downwards download directly from ERA5-Land which accumulate daily up to 00Z. tp at 00Z is then the total accumulation for the previous day.

⁶ssrd_deaccum is the deaccumulated surface solar radiation downwards which was locally computed. The output of e_deaccum at hZ is then the accumulated evaporation from ]h-1,h].

Location:
UQAM:
NetCDF format: ~archive/REANALYSES/ERA5-Land

Invariant fields (NetCDF only)

Some invariant fields are dowloaded by user request. You can find a list of those downloaded fields below :

lsm	Land-sea mask [0-1]
z	Surface geopotential [m² s^-2]
cl	Lake cover [0-1]

AMMA

Period : 200605 - 200609
Horizontal grid : Atlantic Africa area, 0.5x0.5deg
Data source : http://bddamma.ipsl.polytechnique.fr/ecmwf-amma-re-analysis-2.html
Location : ~data/Validation/AMMA
Data policy: http://bddamma.ipsl.polytechnique.fr/data-policy.html
Before using these data please read the CONDITIONS OF USE

2-D fields:

...

Raccourcis espace

Arborescence des pages

Comparaison des versions

Ancienne version 22

Nouvelle version Actuel

Légende

3-hourly forecast, 2-D NetCDF (only year 2019 for now)

2-D fields (RPN only)

2-D fields (NetCDF only) (hourly fields)

SST & sea ice fraction (RPN only)

2-D fields (NetCDF only) (daily fields)

Invariant fields (NetCDF only)

SST & sea ice fraction (RPN only)

3-D fields (RPN only)

Storm tracking fields (RPN only)

ERA5.1

3-D fields (RPN only)

3-D fields (RPN only)

ERA5 Preliminary backextension 1950-1978

2-D fields (NetCDF only)

SST & sea ice fraction (RPN only)

ERA5-Land

2-D fields (NetCDF only)

ERA5-Land

2-D fields (NetCDF only)

Invariant fields (NetCDF only)

AMMA

Raccourcis espace

Arborescence des pages

Historique de la page

Comparaison des versions

Ancienne version 22

Nouvelle version Actuel

Légende

3-hourly forecast, 2-D NetCDF (only year 2019 for now)

2-D fields (RPN only)

2-D fields (NetCDF only) (hourly fields)

SST & sea ice fraction (RPN only)

2-D fields (NetCDF only) (daily fields)

Invariant fields (NetCDF only)

SST & sea ice fraction (RPN only)

3-D fields (RPN only)

Storm tracking fields (RPN only)

ERA5.1

3-D fields (RPN only)

3-D fields (RPN only)

ERA5 Preliminary backextension 1950-1978

2-D fields (NetCDF only)

SST & sea ice fraction (RPN only)

ERA5-Land

2-D fields (NetCDF only)

ERA5-Land

2-D fields (NetCDF only)

Invariant fields (NetCDF only)

AMMA