View Source

(follow the model version links below for more details)

changes include increased ocean model resolution to 1/4 degree and active sea-ice
operational since 22/11/2016 (included)

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)

Implementation Date in S2S	Model version	Time range	Atmosphere Resolution	Ens. Size	Frequency	Re-forecasts	Rfc length	Time range Atmosphere Resolution	Rfc size	Ocean Resolution	Active Sea Ice
01/01/2015	CY40R1	d 0-32		51	2/week Mon/Thu	on the fly	past 20 years	once a week (Thu real-time)	5	1 degree	No
14/05/2015	CY41R1	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 real time)	11	1 degree	No
08/03/2016	CY41R2	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 real time)	11	1 degree	No
22/11/2016	CY43R1	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 real time)	11	1/4 degree	Yes
11/07/2017	CY43R3	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 real time)	11	1/4 degree	Yes
06/06/2018	CY45R1	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 real time)	11	1/4 degree	Yes
11/06/2019	CY46R1	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 real time)	11	1/4 degree	Yes
30/06/2020	CY47R1	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 real time)	11	1/4 degree	Yes

The text in red indicates changes to the model configuration (in addition to model physics) introduced with a new version of the ECMWF model