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TOC > MSC data > GDSPS > GDSPS on MSC Datamart

Global Deterministic Storm Surge Prediction System (GDSPS) data in NetCDF format

This page describes the Global Deterministic Storm Surge Prediction System data available in NetCDF format.

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 via the HTTP protocol. It is possible to access it with a standard browser. In this case, we obtain a list of links giving access to a NetCDF file.

The data can be accessed at the following address :

where :

  • HH : Model run start, in UTC [00 or 12]

A history of 24 hours is maintained in this directory.

Available domain

Global latitude-longitude grid.

Parameter Value
ni 1801
nj 1251
resolution 0.144° x 0.200°

Nomenclature of file directories

NOTE: ALL HOURS ARE IN UTC.

File names have the form:

{YYYYMMDD}T{HH}Z_MSC_GDSPS_{VAR}_{LVL}_{grille}{resolution}_PT{hhh}H.nc

Where:

  • YYYYMMDD: Year, month and day of the beginning of the forecast
  • T : Time delimiter according to ISO8601 norms
  • HH: UTC run time [00, 12]
  • Z : Time zone (UTC hour)
  • MSC : Constant string indicating the Meteorological Service of Canada, source of data
  • GDSPS : Constant string indicating that data is from the Global Deterministic Storm Surge Prediction System
  • VAR : Variable type included in the file [ETAS, SSH]
  • LVL : Vertical level [Sfc for the surface]
  • grille : Horizontal grid lat-lon [LatLon]
  • resolution : Indicating resolution in degreee in latitude and longitude directions [0.144x0.200]
  • PT{hhh}H: Forecast hours based on ISO8601 norms. P, T and H are constant character designating Period, Time and Hour. "hhh" is the forecast hour [000, 001, 002, ..., 240]
  • nc: constant string indicating the NetCDF format is used

Example of file name:

20180417T12Z_MSC_GDSPS_ETAS_Sfc_LatLon0.144x0.200_PT024H.nc

Variable list

NOTE :

  • Total water level (zos) is relative to Mean Water Level (MWL) as defined by the average the total water level over the last 365 days of pseudo-analysis.
  • During the post-processing phase, storm surge elevation (etas) is derived from total water level (zos) by harmonic analysis using t_tide (Foreman et al. 2009). The storm surge elevation has been computed for the [150W, 40W] X [40 N, 80 N] region around Canada and for a band 100 km wide along the shore worldwide. Elsewhere, etas is masked. The model tidal heights can be obtained by taking the difference zos-etas where etas is defined.

Support

If you have any questions about this data, please contact us.

Announcements from the dd_info mailing list

Announcements related to this dataset are available in the dd_info list.