-
Créée par
Roberge, François, dernière mise à jour le sept. 25, 2025
16 min de lecture
CERA-20C
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
All files are in netcdf4 format.
3D Fields (3-hourly)
| GZ | Geopotential [m**2 s**-2] | 3-hourly | analysis |
| HR | Relative humidity [%] | 3-hourly | analysis |
| TT | Temperature [K] | 3-hourly | analysis |
| UU | U component of wind [m s**-1] | 3-hourly | analysis |
| VV | U component of wind [m s**-1] | 3-hourly | analysis |
Location : ~archive/REANALYSES/cera20c/3h
2D Fields (3-hourly)
| MSLP | Mean sea level pressure [Pa] | 3-hourly | analysis |
| SIC | Sea-ice cover [0-1] | 3-hourly | analysis |
| SST | Sea surface temperature [K] | 3-hourly | analysis |
| TAS | 2 metre temperature [K] | 3-hourly | analysis |
Location : ~archive/REANALYSES/cera20c/3h
2D Fields (daily)
| MSLP | Mean sea level pressure [Pa] | daily | analysis |
| PR | Total precipitation [m] | daily | forecast |
| SIC | Sea-ice cover [0-1] | daily | analysis |
| SST | Sea surface temperature [K] | daily | analysis |
| SUND | Sunshine duration [s] | daily | analysis |
| TAS | 2 metre temperature [K] | daily | analysis |
Location : ~archive/REANALYSES/cera20c/daily
ERA40
Period : 195709 - 200208
Horizontal grid : 145x73 (2.5 deg) B grid (CMC/RPN)
Vertical info : 23 pressure levels from 1 hPa to 1000 hPa
Data source : http://data.ecmwf.int/data/d/era40/
Documentation : http://www.ecmwf.int/research/era/Products/Archive_Plan/Archive_plan_toc.html
Location : ~data/Validation/ERA40
Driving data : Atmospheric driving data on pressure levels
Other 6-hourly and monthly mean fields :
on 23 pressure levels (1, 2, 3, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200, 250, 300, 400, 500, 600, 700, 775, 850, 925, 1000 hPa) :
| NAME | DESCRIPTION | UNIT |
|---|---|---|
| TT | Air temperature | C |
| GZ | Geopotential | gdm |
| HU | Specific humidity | kg/kg |
| HR | Relative humidity | % |
| UU | U wind component | knots |
| VV | V wind component | knots |
| WP | vertical velocity | Pa/s |
| DD | Divergence | 1/s |
| QR | Relative vorticity | 1/s |
| PVOR | Potential vorticity | |
| OZ | Ozone gas | ppb |
on model levels :
| ACC | NAME | LEVEL | DESCRIPTION | UNIT |
|---|---|---|---|---|
| GL | Sea-ice cover | 0-1 | ||
| I0 | 1-4 | Soil temperature level 1-4 | K | |
| I1 | 1-4 | Volumetric soil water layer 1-4 | m3/m3 | |
| I5 | SWE, Snow depth (m of equivalent water) SNOMA(I5)=1000*SNORO(7S)*SD | m | ||
| I7 | 1-4 | Ice surface temperature layer 1-4 | K | |
| A | O7 | Snow evaporation (m of water) | m/s | |
| A | SMLT | Snowmelt (m of water) | m/s | |
| CWTR | Total column water (liquid+Ice+Vapour) (kg/m**2) | kg/m2 | ||
| PW | Total column water vapour (kg/m**2) | kg/m2 | ||
| A | AE | Stratiform precipitation (Large-scale precipitation) | m/s | |
| A | PC | Convective precipitation | m/s | |
| A | SN | Snowfall (convective + stratiform) | m/s | |
| A | AH | Surface sensible heat flux | W/m2 | |
| A | AV | Surface latent heat flux | W/m2 | |
| PN | Mean sea level pressure | hPa | ||
| H | Boundary layer height | m | ||
| NT | Total cloud cover (instantaneous) | 0-1 | ||
| UU | 1sg | 10 metre U wind component | knots | |
| VV | 1sg | 10 metre V wind component | knots | |
| TT | 1sg | 2 metre temperature | C | |
| TD | 1sg | 2 metre dewpoint temperature | C | |
| A | N4 | Surface solar radiation downwards = AS/(1-AL(5)) | W/m2 | |
| A | AD | Surface thermal radiation downwards | W/m2 | |
| A | AS | Surface solar radiation | W/m2 | |
| A | AI | Surface thermal radiation | W/m2 | |
| A | TOAS | Top solar radiation = (AB-AU) | W/m2 | |
| A | AR | Top thermal radiation | W/m2 | |
| A | S7 | East-West surface stress | (N/m2) | |
| A | S8 | North-South surface stress | (N/m2) | |
| A | EVAP | Evaporation (m of water) | m/s | |
| NB | Low cloud cover | 0-1 | ||
| NM | Medium cloud cover | 0-1 | ||
| NH | High cloud cover | 0-1 | ||
| A | UG | Latitudinal component of gravity wave stress | m/s3 | |
| A | V6 | Meridional component of gravity wave stress | m/s3 | |
| A | N0 | Runoff (m of water) | m/s | |
| O3 | Total column ozone (kg/m**2) | kg/m2 | ||
| A | SN_C | Top net solar radiation, clear sky | W/m2 | |
| A | LN_C | Top net thermal radiation, clear sky | W/m2 | |
| A | SN_C | Surface net solar radiation, clear sky | W/m2 | |
| A | LN_C | Surface net thermal radiation, clear sky | W/m2 | |
| WV_H | Significant wave height | |||
| WV_D | Mean wave direction | |||
| WV_P | Mean wave period | |||
| TN | Temperature of snow layer | K |
ERA-Interim
ERA-Interim, 2.0 degree
Period : 198901 - 200901
Horizontal grid : 181x91 (2.0 deg) B grid (CMC/RPN)
Vertical info : 22 pressure levels from 10 hPa to 1000 hPa
Data source : Colin Jones, SMHI
Driving data : Atmospheric driving data on pressure levels
SST & sea ice
Location : ~data/Validation/ERA-Interim
ERA-Interim, 1.5 degree
Period : 197901 - 201212
Horizontal grid : 241x121 (1.5 deg) B grid (CMC/RPN)
Vertical info : 34 pressure levels from 5 hPa to 1000 hPa
Data source : Michel Giguere, Ouranos
Driving data : 6-houtly atmospheric driving data on pressure levels (TT, HU, UU, VV, GZ, P0)
6-houtly SST & sea ice
CLASS offline driving data : 3- and 6-houly : PR, AD, N4
6-houly : TT, UV, HU, P0
Data source : Camille Garnaud, UQAM
Location : ~data/Validation/ERA-Interim_1.5
ERA-Interim, 0.75 degree
Period : 197901 - 201412
Horizontal grid : 481x241 (0.75 deg) B grid (CMC/RPN)
NOTE: Seems that there are some "problems" with the ECMWF sea ice cover fraction:
2003.10.22 06Z – 2003.10.23 00Z (Overestimated ice Baffin Bay, Greenland Sea)
2006.10.29 12Z – 2006.10.30 06Z (Laplev/Kara Sea hole)
2006.12.01 12Z – 2006.12.02 06Z (Chukchi/Beaufort Sea hole)
2008.03.08 12Z – 2008.03.09 06Z (Underestimate Labrador Sea, Gulf of St. Lawrence)
2008.04.03 12Z – 2008.04.04 06Z (Chukchi, Hudson/Baffin Bay holes)
2012.07.11 06Z – 2012.07.14 00Z (Ice-free North Pole)
2012.07.14 06Z – 2012.07.15 00Z (North of Greenland hole)
2013.01.20 06Z – 18Z (Ice-free Bering Strait/Sea)
Validation data :
Location: ~data/Validation/ERA-Interim_0.75
CRCM5 driving data : 6-hourly atmospheric driving data on pressure levels (TT, HU, UU, VV, GZ, P0)
6-hourly SST & sea ice
Location : ~data/Driving_data/Pilots/ERA-Interim_0.75
Data source : Michel Giguere, Ouranos and ECMWF
CLASS offline driving data : 3-hourly forecast : TT, UV, HU, P0, PR, AD, N4
6-hourly analysis : TT, UV, HU, P0 + 6-hourly forecast : PR, AD, N4
Location : ~data/Driving_data/Offline/ERA-Interim_0.75
Data source : http://apps.ecmwf.int/datasets
6-hourly analysis, 2-D
| NAME | DESCRIPTION | UNIT |
|---|---|---|
| TT | 2m temperature | oC |
| TD | 2m dew point temperature | oC |
| HU | 2m specific humidity | kg/kg |
| P0 | Surface pressure | hPa |
| UU | 10m U wind component | knots |
| VV | 10m V wind component | knots |
| UV | 10m wind speed | knots |
Location : ~data/Driving_data/Offline/ERA-Interim_0.75/6h_Analysis
Data source : http://apps.ecmwf.int/datasets
3-hourly forecast, 2-D
| NAME | DESCRIPTION | UNIT |
|---|---|---|
| TT | 2m temperature | oC |
| TD | 2m dew pont temperature | oC |
| HU | 2m specific humidity | kg/kg |
| P0 | Surface pressure | hPa |
| UU | 10m U wind component | knots |
| VV | 10m V wind component | knots |
| UV | 10m wind speed | knots |
| AS | Sensible heatflux | W/m2 |
| AV | Latent heatflux | W/m2 |
| AD | Surface thermal radiation downwards | W/m2 |
| N4 | Surface solar radiation downwards | W/m2 |
| AI | Surface thermal radiation | W/m2 |
| AS | Surface solar radiation | W/m2 |
| PR | Total precipitation | m/s |
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 (0.75 deg) B grid (CMC/RPN)
Data source : http://apps.ecmwf.int/datasets/data/interim-full-moda/
Location : ~data/Validation/ERA-Interim_0.75/Monthly_means
ERA5
Period : 197901 to current (new months added upon request)
Horizontal grid : 0.25° global B grid (CMC/RPN) Temporal resolution : 1-, 3-hourly resp. daily (for Tmin/Tmax/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).
2-D fields (RPN only)
Note: For fields valid only for a certain level the level is part of the file name but not of the variable name! For these fields the variable name is given in the column beside.
| ABE | Available buoyant energy [J/kg] | 1-hourly | analysis | |
| AD | Accum. of incoming IR flux at TOA [W/m²] | 1-hourly | forecast | |
| AH | Accum. of surface sensible heat flux [W/m²] | 1-hourly | forecast | |
| AI | Accum. of surface net thermal radiation [W/m²] | 1-hourly | forecast | |
| AR | Accum. of outgoing IR flux at TOA [W/m²] | 1-hourly | forecast | |
| AS | Accum. of absorbed visible flux at the surface [W/m²] | 1-hourly | forecast | |
| AV | Accum. of surface latent heat flux [W/m²] | 1-hourly | forecast | |
| DN | Snow density [kg/ m³] | 1-hourly | analysis | |
| EVAP | Accum. of evaporation [m/s of water equivalent] | 1-hourly | forecast | |
| GZ500 | GZ | Geopotential at 500 hPa [dam] (deca meters) | 1-hourly | forecast |
| HR2m | HR | 2 m relative humidity [fraction] | 1-hourly | analysis |
| HU2m | HU | 2 m specific humidity [kg/kg] | 1-hourly | analysis |
| I0_1 | I0 | Soil temperature of level 1 (1-7 cm) [°K] | 1-hourly | analysis |
| I0_2 | I0 | Soil temperature of level 2 (7-28 cm) [°K] | 1-hourly | analysis |
| IDMA | Vertically integrated divergence of total moisture (water vapor, cloud water and cloud ice) [g/m²/s] | 1-hourly | analysis | |
| IH | Vertically Integrated water vapor [kg/m²] | 1-hourly | analysis | |
| MS | Skin temperature [K] | 1-hourly | analysis | |
| N4 | Accum. of downward solar radiation at the surface [W/m²] | 1-hourly | forecast | |
| P0 | Surface pressure [hPa] | 1-hourly | analysis | |
| PC | Convective precipitation [m/s] | 1-hourly | forecast | |
| PN | Mean sea level pressure [hPa] | 1-hourly | analysis | |
| PR | Total precipitation [m/s] | 1-hourly | forecast | |
| PTYP | Precipitation type | 1-hourly | forecast | |
| SN | Snowfall [m/s of water equivalent] | 1-hourly | forecast | |
| SWE | Snow water equivalent [m of water equivalent] | 1-hourly | analysis | |
| T5 | 2 m min temperature [°K] | daily | derived from 1h 2m TT analysis | |
| T9 | 2 m max temperature [°K] | daily | derived from 1h 2m TT analysis | |
| TCC | 2-D total cloud cover [0-1] | 1-hourly | forecast | |
| TD2m | TD | 2 m dewpoint temperature [°C] | 1-hourly | analysis |
| TDRA | Accum. of sub-surface runoff [mm/s] | 1-hourly | forecast | |
| TRAF | Accum. of surface runoff [mm/s] | 1-hourly | forecast | |
| TT2m | TT | 2 m temperature [°C] | 1-hourly | analysis |
| TTRA | Accum. of total runoff (surface + drainage) [mm/s] | 1-hourly | forecast | |
| UU10m | UU | 10 m U-wind component [knots] | 1-hourly | analysis |
| VV10m | VV | 10 m V-wind component [knots] | 1-hourly | analysis |
| WGE | Wind gust estimate [m/s] | 1-hourly | forecast | |
| WGEX | Maximum of wind gust estimate [m/s] | 1-hourly | forecast | |
| WW500 | WW | Vertical wind at 500 hPa [Pa/s] | 1-hourly | analysis |
| TM | Sea surface temperature [K] | daily | analysis | |
| LG | Sea ice area fraction [0-1] | daily | analysis |
Note: Fields and units are given for RPN format. For fields and units in NetCDF format check table below!
Location: RPN format : ~data/ReAnalysis/ERA5/2D_Fields
~data/SST_SeaIce_degK/ERA5 (for 'TM' and 'LG' !!!)
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 03 May 2025 all months up to 202412 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.
| t2m | 2 metre temperature [K] | 1-hourly | analysis |
| d2m | 2 metre dewpoint temperature [K] | 1-hourly | analysis |
| q2m | 2 metre specific humidity1 [kg/kg] | 1-hourly | analysis |
| r2m | 2 metre relative humidity2 [%] | 1-hourly | analysis |
| cape | Convective available potential energy [J kg**-1] | 1-hourly | analysis |
| cp | Convective precipitation [m] | 1-hourly | forecast |
| tp | Total precipitation [m] | 1-hourly | forecast |
| ptype | Precipitation type [dimensionless] | 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 |
| i10fg | Instantaneous 10 metre wind gust [m/s] | 1-hourly | forecast |
| fg10 | Maximum 10m wind gust since previous post-processing[m/s] | 1-hourly | forecast |
| e | Evaporation [m of water equivalent] | 1-hourly | forecast |
| rsn | Snow density [kg m**-3] | 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 |
| smelt | Snowmelt [m of water equivalent] | 1-hourly | forecast |
| skt | Skin temperature [K] | 1-hourly | analysis |
| stl1 | Soil temperature level 1 [K] | 1-hourly | analysis |
| stl2 | Soil temperature level 2 [K] | 1-hourly | analysis |
| msl | Mean sea level pressure [Pa] | 1-hourly | analysis |
| sp | Surface pressure [Pa] | 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 | 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:
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/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] | 1-hourly | forecast |
| d2m | 2 metre dewpoint temperature [K] | 1-hourly | forecast |
| tp | Total precipitation1 [m] | 1-hourly | forecast |
| tp_deaccum | Deaccumulated total precipitation2 [mm] | 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 |
| e | Evaporation3 [m of water equivalent] | 1-hourly | forecast |
| 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] | 1-hourly | forecast |
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 ssrd_deaccum at hZ is then the accumulated surface solar radiation downwards from ]h-1,h].
Location:
UQAM:
NetCDF format: ~archive/REANALYSES/ERA5-Land/1h
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] |
Location:
UQAM:
NetCDF format: ~archive/REANALYSES/ERA5-Land/Invariant_fields
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:
| NAME | DESCRIPTION | UNIT |
|---|---|---|
| MG | Land-sea mask | [0-1] |
| GZ | Geopotential | dam |
| PN | Mean sea level pressure | hPa |
| J8 | Skin temperature | Kelvin |
| TM | SST | Kelvin |
| TT | 2m temperature | oC |
| UU | 10m U wind component | knots |
| VV | 10m V wind component | knots |
| PC | Convective precipitation | m/s |
| AE | Large scale precipitation | m/s |
| AL | Albedo | [0-1] |
| IWVM | Total column water vapor | kg/m2 |
Fields on pressure levels: 1000, 950, 925, 900, 850, 800, 700, 600, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30, 20, 10, 7, 5, 3, 2, 1
| NAME | DESCRIPTION | UNIT |
|---|---|---|
| TT | Air temperature | oC |
| UU | U wind component | knots |
| VV | V wind component | knots |
| WW | Vertical wind component | Pa/s |
| QR | Relative vorticity | s-1 |
| HR | Relative humidity | % |
| GZ | Geopotential | dam |
Fields on model levels:
| NAME | DESCRIPTION | UNIT |
|---|---|---|
| PR | Total precipitation | m/s |
JRA25
Period : 197901 - 201212
Horizontal grid : 289x145 (1.25 deg) L grid (CMC/RPN)
Vertical info : 23 pressure levels from 0.4 hPa to 1000 hPa
Documentation : http://jra.kishou.go.jp/JRA-25/AboutJRA25_en.html
http://jra.kishou.go.jp/JRA-25/JRA25quality_en.html
Driving data : Atmospheric driving data on pressure levels
Location : ~data/Driving_data/Pilots/JRA25
RCaS v3.1
La Réanalyse Canadienne de Surface (CaSR, anciennement RDRS/RCaS) est un jeu de données de réanalyse atmosphérique et de surface à haute résolution développé par Environnement et Changement climatique Canada (ECCC). Elle couvre l’Amérique du Nord, l’Amérique centrale et une grande partie du Groenland, et fournit des champs horaires de variables météorologiques et hydrologiques sur une grille régulière de 10 km.
Objectifs et méthodes
CaSR combine plusieurs composantes du système de prévision et d’assimilation canadien :
- Les conditions atmosphériques globales issues de ERA5 (ECMWF) servent de conditions aux frontières ;
- Le Système régional de réanalyse déterministe (SRRD) est utilisé pour la dynamique atmosphérique à l’échelle nord-américaine ;
- Le modèle de surface GEM-Surf et le système d’assimilation de données de surface CaLDAS assurent une représentation fine de l’énergie, de l’humidité et de la neige au sol ;
- Pour les précipitations, une approche hybride est utilisée :
- un champ prévu par le modèle atmosphérique,
- une réanalyse hors ligne corrigée grâce à CaPA (Système canadien d’assimilation des précipitations), intégrant un très grand nombre d’observations.
Cette approche permet d’obtenir un produit cohérent, spatialement et temporellement homogène, tout en maximisant la représentativité des observations disponibles.
Période : 198001-202312
Couverture spatiale : Amérique du Nord
Résolution spatiale : 0.09°
VARIABLES
Nom de la variable | Description | Type | Niveau | Unité | Fréquence |
CaSR_v3.1_P_PR0_SFC | Précipitation totale prévue | Prévision | Surface | m | 1h |
CaSR_v3.1_A_PR0_SFC | Précipitation totale analysée (désagrégée CaPA-24h/6h) | Analyse | Surface | m | 1h |
CaSR_v3.1_A_PR24_SFC | Précipitation totale analysée sur 24h (valide à 12 UTC) | Analyse | Surface | m | 24h |
CaSR_v3.1_A_CFIA_SFC | Indice de confiance de l’analyse 24h | Analyse | Surface | - | 24h |
CaSR_v3.1_P_PE0_SFC | Quantité de grésil (équivalent eau liquide) | Prévision | Surface | m | 1h |
CaSR_v3.1_P_FZ0_SFC | Quantité de précipitations verglaçantes (équivalent eau liquide) | Prévision | Surface | m | 1h |
CaSR_v3.1_P_SN0_SFC | Quantité de neige (équivalent eau liquide) | Prévision | Surface | m | 1h |
CaSR_v3.1_P_RN0_SFC | Quantité de précipitations liquides | Prévision | Surface | m | 1h |
CaSR_v3.1_A_TT_1.5m | Température de l’air analysée | Analyse | 1.5 m | °C | 3h |
CaSR_v3.1_P_TT_1.5m | Température de l’air prévue | Prévision | 1.5 m | °C | 1h |
CaSR_v3.1_P_TT_09975 | Température de l’air prévue | Prévision | ~20 m | °C | 1h |
CaSR_v3.1_A_TD_1.5m | Température du point de rosée analysée | Analyse | 1.5 m | °C | 3h |
CaSR_v3.1_P_TD_1.5m | Température du point de rosée prévue | Prévision | 1.5 m | °C | 1h |
CaSR_v3.1_P_TD_09975 | Température du point de rosée prévue | Prévision | ~20 m | °C | 1h |
CaSR_v3.1_P_HR_1.5m | Humidité relative prévue | Prévision | 1.5 m | - | 1h |
CaSR_v3.1_P_HR_09975 | Humidité relative prévue | Prévision | ~20 m | - | 1h |
CaSR_v3.1_P_HU_1.5m | Humidité spécifique prévue | Prévision | 1.5 m | kg/kg | 1h |
CaSR_v3.1_P_HU_09975 | Humidité spécifique prévue | Prévision | ~20 m | kg/kg | 1h |
CaSR_v3.1_P_P0_SFC | Pression de surface | Prévision | Surface | mb | 1h |
CaSR_v3.1_P_PN_SFC | Pression au niveau de la mer | Prévision | Surface | mb | 1h |
CaSR_v3.1_P_UU_10m | Vent – composante U | Prévision | 10 m | kts | 1h |
CaSR_v3.1_P_VV_10m | Vent – composante V | Prévision | 10 m | kts | 1h |
CaSR_v3.1_P_UUC_10m | Vent – composante U corrigée | Prévision | 10 m | kts | 1h |
CaSR_v3.1_P_VVC_10m | Vent – composante V corrigée | Prévision | 10 m | kts | 1h |
CaSR_v3.1_P_UVC_10m | Vent – module | Prévision | 10 m | kts | 1h |
CaSR_v3.1_P_WDC_10m | Vent – direction météorologique | Prévision | 10 m | ° | 1h |
CaSR_v3.1_P_UU_09975 | Vent – composante U | Prévision | ~20 m | kts | 1h |
CaSR_v3.1_P_VV_09975 | Vent – composante V | Prévision | ~20 m | kts | 1h |
CaSR_v3.1_P_UUC_09975 | Vent – composante U corrigée | Prévision | ~20 m | kts | 1h |
CaSR_v3.1_P_VVC_09975 | Vent – composante V corrigée | Prévision | ~20 m | kts | 1h |
CaSR_v3.1_P_UVC_09975 | Vent – module | Prévision | ~20 m | kts | 1h |
CaSR_v3.1_P_WDC_09975 | Vent – direction météorologique | Prévision | ~20 m | ° | 1h |
CaSR_v3.1_P_FB_SFC | Flux solaire descendant | Prévision | Surface | W/m² | 1h |
CaSR_v3.1_P_FI_SFC | Flux infrarouge entrant | Prévision | Surface | W/m² | 1h |
CaSR_v3.1_P_GZ_SFC | Hauteur géopotentielle | Prévision | Surface | dam | 1h |
CaSR_v3.1_P_GZ_09975 | Hauteur géopotentielle | Prévision | ~20 m | dam | 1h |
CaSR_v3.1_P_SWE_LAND | Équivalent en eau de la neige au sol | Prévision | Surface | kg/m² | 24h |
CaSR_v3.1_P_SD_LAND | Profondeur de neige au sol | Prévision | Surface | cm | 24h |
INFORMATIONS IMPORTANTES
Les analyses de précipitations sur 24 heures sont également diffusées publiquement, accompagnées de l’indice de confiance de l’analyse, c’est-à-dire des sorties directes de CaPA-24h : CaSR_v3.1_A_PR24_SFC correspond à l’analyse de précipitations sur 24 heures valides à 12 UTC. Cette variable est égale à la somme des 24 valeurs précédentes de CaSR_v3.1_A_PR0_SFC (c’est-à-dire que la somme des valeurs de CaSR_v3.1_A_PR0_SFC dans chaque fichier donne CaSR_v3.1_A_PR24_SFC).
Un bogue a été découvert dans l’analyse des précipitations pour les années 2005 à 2010 (variables : A_PR0_SFC, A_PR24_SFC, A_CFIA_SFC), affectant principalement le Québec (et très légèrement, de façon sporadique, ailleurs au Canada). Nous travaillons activement à corriger ce problème. La prochaine version corrigée, CaSRv3.2, devrait être publiée dans les prochaines semaines. Elle inclura non seulement la correction de ce bogue, mais aussi des améliorations supplémentaires des analyses de précipitations pour l’année 2024 ainsi que quelques changements techniques.
Location : ~archive/Other_ECCC_Data/CaSRv3.1/netcdf/