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 IceRemarks
CY48R127/06/2023d 0-46

Tco319L137 (about 32 km) 

101

daily

on the flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes
CY47R313/10/2021d 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 flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes
CY47R211/05/2021d 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 flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes
CY47R130/06/2020d 0-46

Tco639 L91 (about 16 km) up to day 15 and Tco319 (about 32 km) after day 15 day 15 L91

51

2/week

(Mon/Thu)
on the flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes

6-hourly 10u/v added since  

CY46R111/06/2019d 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 flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes

additional ocean parameters  added since 2020/01/02

CY45R106/06/2018d 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 flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes
CY43R3

11/07/2017

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 flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes
CY43R122/11/2016d 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 flypast 20 years

2/week

(Mon/Thu)

111/4 degreeYes
CY41R208/03/2016d 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 flypast 20 years

2/week

(Mon/Thu)

111 degreeNo
CY41R114/05/2015d 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 flypast 20 years

2/week

(Mon/Thu)

111 degreeNo
CY40R101/01/2015d 0-32TL639 L91 (about 32 km) up to day 10 and TL319 (about 64 km) after day 10 51

2/week

(Mon/Thu)

on the flypast 20 years

once a week

(Thu)

5 1 degreeNo

Description of the main changes

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)