AES40 Hindcast

The advent of long-term climate reanalysis projects undertaken by major numerical weather prediction centres has significantly changed the approach to the investigation of climate variability and trend on decadal and longer time scales.
AES40 is a project undertaken by Oceanweather Inc. for the Meteorological Service of Canada, formerly Atmospheric Environment Service (AES), to produce the first 40-year (1958-1997) wind and wave hindcast of the North Atlantic (AES40). The objective of the study was to use the NRA (NCEP-NCAR Reanalysis Project) on a high-resolution grid to produce a high-quality, homogeneous, long term wind and wave data base for assessment of the wave climate of the NA (North Atlantic Ocean), its trend and variability. The most important feature of the hindcast was the rigorous attention devoted to producing the wind fields used to drive the wave model.
Wind fields for all significant storms were painstakingly kinematically reanalyzed with the aid of an interactive Wind Workstation. Furthermore, high-resolution surface wind fields for all tropical cyclones, as specified by a proven tropical cyclone boundary layer model, were assimilated into the wind fields to provide greater skill and resolution in the resulting wave hindcasts. The wave model used for this hindcast is a discrete spectral type called OWI 3-G.
Since the completion of the 40-year hindcast, Oceanweather Inc. extended the project both forwards and backwards to cover 50 years, which now extends from July 1954 to June 2004. This hindcast was later updated by the MSC50 hindcast.

MSC50 Hindcast

In 2005, work was completed on an update to the AES40 hindcast in Canadian waters. The MSC50 applied a shallow version of the OWI-3G on a 0.1 degree grid covering much of the Canadian Maritimes. The North Atlantic basin model was also upgraded to OWI-3G shallow and run at a 0.5 degree resolution. Presently the hindcast covers the period from 1954-2013.
Presented here are select output from the MSC50 and original AES40 hindcast. Full details on the MSC50 hindcast can be found in the paper The MSC50 Wind and Wave Reanalysis given at the 9th International Workshop on Wave Hindcasting and Forecasting (www.waveworkshop.org).
Digital data in Canadian waters from the hindcast may be obtained from DFO Integrated Science Data Management (BradshawB@dfo-mpo.gc.ca). Standard output is 1-hourly wind/wave fields and spectra at select points. Value-added analysis may be obtained from MSC Climate Services (Rick.Fleetwood@ec.gc.ca) on a cost-recovery basis, on request.
Inquiries of a technical nature should be directed to Val Swail (Val.Swail@ec.gc.ca).


MSC Beaufort Hindcast

Presently the hindcast covers the period from 1970-2013.
This project is described in The MSC Beaufort Sea Wind and Wave Reanalysis paper and presentation given at the 10th International Workshop on Wave Hindcasting and Forecasting (www.waveworkshop.org).
Digital data in Canadian waters from the hindcast may be obtained from DFO Integrated Science Data Management (BradshawB@dfo-mpo.gc.ca). Standard output is 1-hourly wind/wave fields and spectra at select points. Value-added analysis may be obtained from MSC Climate Services (Rick.Fleetwood@ec.gc.ca) on a cost-recovery basis, on request.
Inquiries of a technical nature should be directed to Val Swail (Val.Swail@ec.gc.ca).