TOC > MSC Open Data > WCPS > WCPS-NEMO on MSC Datamart
Water Cycle Prediction System (WCPS) NEMO data in NetCDF over the Great Lakes and St. Lawrence River
The ocean-ice model, NEMO-CICE, from WCPS produces hourly forecast products. This data is available in NetCDF format with a latitude and longitude grid, corresponding to a 1km resolution (0.009 x 0.009 degree).
Data location
MSC Datamart data can be automatically retrieved with the Advanced Message Queuing Protocol (AMQP) as soon as they become available. An overview and examples to access and use the Meteorological Service of Canada's open data is also available.
The data is available using the HTTPS protocol and resides in a directory that is plainly accessible to a web browser. Visiting that directory with an interactive browser will yield a raw listing of links, each link being a downloadable NetCDF file.
The data can be accessed at the following URLs:
where:
- nd : Spatial dimension, latitude and longitude [2d]
- HH : Model run start, in UTC [00, 06, 12, 18]
- hhh : Forecast hour [001, ..., 084]
A 30 day history is kept in this directory.
Technical specification of the grid
In the complete domain indicated by the white rectangle, the valide domain, which covers the lakes, is in color.
| Parameter | Value |
|---|---|
| ni | 1681 |
| nj | 3181 |
| resolution at 45° N | 1km |
Filename nomenclature
NOTE: ALL HOURS ARE IN UTC.
The files have the following nomenclature:
CMC_wcps_nemo_Variable_LevelType_Level_ProjectionResolution_YYYYMMDDHH_Phhh.nc
where:
- CMC : Constant string indicating that the data is from the Canadian Meteorological Centre (CMC)
- wcps_nemo : Constant string indicating that the data is from WCPS-NEMO component
- Variable : Variable type included in this file
- LevelType : Level type [sfc, depth, tgl]
- Level : Level value: 0 for sfc (surface), 0.5 for depth (lake depth in meters), 40 for tgl (altitude in meter)
- Projection : Constant string indicating the latitude and longitude projection [latlon]
- Resolution : Resolution in degreee 0.009x0.009 (about 1km) in latitude and longitude directions
- YYYYMMDD : Year, month and days of the beginning of the forecast
- HH : UTC run time [00, 06, 12, 18]
- Phhh : P constant character, hhh the forecast hour [001,002, ..., 084]
- nc : constant string indicating the NetCDF format
Example:
- CMC_wcps_nemo_vomecrty_depth_0.5_latlon0.009x0.009_2019011100_P036.nc
List of variables
List of 2D variables available in the files:
- tairsurf : Air temperature at about 40 meters in height
- uwindsurf : Wind X velocity at about 40 meters in height
- vwindsurf : Wind Y velocity at about 40 meters in height
- vozocrtx : Sea water X velocity at the first model layer
- vomecrty : Sea water Y velocity at the first model layer
- votemper : Sea water potential temperature at the first model layer
- vosaline : Sea water salinity at the surface
- sossheig : Sea surface height above geoid. For Great Lakes, the reference is IGLD85
- sokaraml : Ocean mixed layer depth based on density criterion
- iiceconc : Sea ice area fraction
- iicevol : Sea ice volume per unit grid cell area
- itzocrtx : Sea ice X velocity
- itmecrty : Sea ice Y velocity
- iicepressure : Depth-integrated internal sea ice pressure
- iicestrength : Depth-integrated compressive sea ice strength
Support
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