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(follow the model version links below for more details)
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)
Detailed model description
Page containing details for all model configurations available in S2S since the project start =>ECMWF model description
Overview of the model changes
| Model version | Implementation Date in S2S | Time range | Atmosphere Resolution | Ens. Size | Frequency | Rfc type | Rfc length | Rfc frequency | Rfc size | Ocean Resolution | Active Sea Ice | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CY48R1 | 27/06/2023 | d 0-46 | Tco319L137 (about 32 km) | 101 | daily | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes | |
| CY47R3 | 13/10/2021 | d 0-46 | Tco639 L137 (about 16 km) up to day 15 and Tco319 (about 32 km) after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes | |
| CY47R2 | 11/05/2021 | d 0-46 | Tco639 L137 (about 16 km) up to day 15 and Tco319 (about 32 km) after day 15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu) | 11 | 1/4 degree | Yes | |
| CY47R1 | 30/06/2020 | d 0-46 | Tco639 L91 (about 16 km) up to day 15 and Tco319 (about 32 km) after day 15 day 15 L91 |
Implementation
Date in S2S
Time range
Atmosphere
Resolution
Ocean
Resolution
| 51 | 2/week (Mon/Thu) | on the fly | past 20 years |
2/week (Mon/Thu |
) |
| 11 |
| 1/4 degree | Yes | 6-hourly 10u/v added since |
| CY46R1 | 11/06/2019 |
|---|
| d 0-46 |
Tco639 L91 (about 16 km) up to day |
15 and Tco319 (about 32 km) after day |
15 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | 2/week (Mon/Thu |
) | 11 | 1/4 degree |
| Yes | additional ocean parameters added since 2020/01/02 |
| CY45R1 | 06/06/2018 |
|---|
| d 0-46 |
Tco639 L91 (about 16 km) up to day 15 |
and Tco319 (about 32 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/ |
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07/ |
|---|
2017 | d 0-46 |
|---|
Tco639 L91 (about 16 km) up to day 15 |
and Tco319 (about 32 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 |
|---|
Tco639 L91 (about 16 km) up to day 15 |
and Tco319 (about 32 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 |
|---|
Tco639 L91 (about 16 km) up to day 15 |
and Tco319 (about 32 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/ |
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| 05/ |
|---|
| 2015 | d 0-46 |
|---|
TL639 L91 (about 32 km) up to day |
10 and TL319 (about 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 | TL639 L91 (about 32 km) up to day 10 and TL319 (about 64 km) after day 10 | 51 | 2/week (Mon/Thu) | on the fly | past 20 years | once a week (Thu) | 5 | 1 degree | No |
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Description of the main changes
| Info |
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For the full details refer to the official IFS documentation. |
CY48R1
- increased eps size to 101 for the real-time forecasts
- the frequency changed to daily for the real-time forecasts since 28/06/2023
- the same horizontal resolution for the atmosphere Tco319L137 (about 32 km) and the whole forecast range
- the first reforecasts run with the new cycle on 29/06/2023
2020/01/02 Addition of ocean parameters
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)