Description of the model changes
(follow the model version links below for more details)
CY47R1
CY46R1
CY45R1
CY43R3
CY43R1
- changes include increased ocean model resolution to 1/4 degree and active sea-ice
- operational since 22/11/2016 (included)
CY41R2
- operational from 8/03/2016 (included) to 22/11/2016 (excluded)
CY41R1
- changes include extension of re-forecast ensemble size to 11 twice-weekly and forecast length to 46 days
- operational from 14/05/2015 (included) to 8/03/2016 (excluded)
CY40R1
- operational before 14/05/2015 (excluded)
Overview of the model changes
| Model version | Implementation Date in S2S | Time range | Atmosphere Resolution | Ens. Size | Frequency | Re-forecasts | Rfc length | Time range | Rfc size | Ocean Resolution | Active Sea Ice |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CY47R1 | 30/06/2020 | d 0-46 | 16 km up to day 15 31 km after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes |
| CY46R1 | 11/06/2019 | d 0-46 | 16 km up to day 15 31 km after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes |
| CY45R1 | 06/06/2018 | d 0-46 | 16 km up to day 15 31 km after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes |
| CY43R3 | 11/07/2017 | d 0-46 | 16 km up to day 15 31 km after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes |
| CY43R1 | 22/11/2016 | d 0-46 | 16 km up to day 15 31 km after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes |
| CY41R2 | 08/03/2016 | d 0-46 | 16 km up to day 15 31 km after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1 degree | No |
| CY41R1 | 14/05/2015 | d 0-46 | 32 km up to day 10 64 km after day 10 | 51 | 2/week Mon/Thu | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1 degree | No |
| CY40R1 | 01/01/2015 | d 0-32 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | once a week (Thu) | 5 | 1 degree | No |
The text in red indicates changes to the model configuration (in addition to model physics) introduced with a new version of the ECMWF model