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Comment: inclusion of seasonal-monthly-ocean dataset

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 Status on
Time range
(forecasts and
hindcasts)
Resolution of
atmospheric model
Resolution of
ocean model
Forecast initial
conditions
Forecast
ensemble size
Hindcast
initial conditions
Hindcasts
ensemble size
Hindcast period

Hindcast
production
schedule

ECMWF
(ecmf)		215 days

TCO319/L91

Dynamics:TCO319 cubic octahedral grid

Physics: O320 Gaussian grid (36 km)

91 levels in vertical, to 0.01hPa (80km)

0.25° ORCA grid

75 levels in vertical

 1st of month 51 members 1st of month251981-2016fixed
UKMO
(egrr)		215 days

N216/L85

0.83° x 0.56° (~ 60km in mid-latitudes)

85 levels in vertical, to 85km

0.25° ORCA grid

75 levels in vertical

 each day of month 2 members/day(4)

1st, 9th, 17th, 25th

of month

7 members/start

time

1993-2016on-the-fly(1)
Météo-France(3)
(lfpw)		7 calendar months

TL359/L137 (0.5°)

137 levels in vertical, to 0.01hPa

0.25° ORCA grid

75 levels in vertical

last and penultimate Thursday of previous month

1st of month

25 members each

1 member

last and penultimate Thursday of previous month

1st of month

12 members each

1 member

1993-2018fixed
DWD
(edzw)		6 calendar months

T127 (~100 km) 

95 levels in vertical, to 0.01hPa

0.4° TP04 grid

40 levels in vertical

1st of month

50 members

1st of month30 members1993-2019fixed
CMCC
(cmcc)		6 calendar months

approx  0.5° lat-long

46 levels in vertical, to 0.2hPa

0.25° ORCA grid

50 levels in vertical

1st of month50 members1st of month40 members1993-2016fixed

NCEP
(kwbc)

215 days

T128/L64 (~ 1°)

64 levels in vertical, to 0.02hPa

0.25° (equator) to 0.5° 

40 levels in vertical

each day of month

members initialised every 6 hours (at 0h, 6h, 12h and 18h UTC)

4 members/day

every 5 days (5)

members initialised every 6 hours (at 0h, 6h, 12h and 18h UTC)

4 members/start date

1993-2016fixed
JMA
(rjtd)		215 days

TL319 (approx. 55km)

100 levels in vertical, to 0.01hPa

0.25° tripolar grid

60 levels in vertical

every day of month5 members/day2 start dates lagged by 15 days (6)5 members/start date1993-2016fixed

ECCC (cwao) (7)
CanCM4i

(component of CanSIPSv2.1)

214 days

T63 (~2.8° lat-long)

35 levels in vertical, to 1hPa

~0.94° (lat)
~1.4° (lon)

40 levels in vertical


1st of the month10 members1st of the month10 members1993-2020fixed

ECCC (cwao) (7)
GEM5-NEMO

(component of CanSIPSv2.1)

214 days

~1.1° lat-long (~110 km)

85 levels in vertical, to 0.1hPa

1/3° (equator) to 1°

50 levels in vertical


1st of the month10 members1st of the month10 members1993-2020fixed


 NOTES

(1) For each real-time forecast start date, the associated hindcast data is produced and made available through the CDS at least one month in advance. The details about data availability can be found in "Summary of available data" page.

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For these forecasting systems, a unique value of the keyword "system" is assigned trying to map as close as possible the version numbering used by the forecasting centres. Specifically:

Forecasting centreForecasting system nameCDS 'system' valueCDS 'model_id'(*)
ECMWF

System 44
SEAS55
51(a)

SEAS5-v20171101

Météo-FranceSystem 55
System 66

System6-v20170501

System 77

System7-v20190301

System 88

System8-v20210101

CMCCSPS33

CMCC-CM2-v20160423

SPS3.535

CMCC-CM2-v20191201

DWDGCFS2.02

GCFS2.0-v20171123

GCFS2.121

GCFS2.1-v20200320

NCEPCFSv22

CFSv2-v20110310

JMACPS22

cps2-v20150526

CPS33

cps3-v20220201

ECCCGEM-NEMO1

GEM-NEMO-v20190731

CanCM4i2

CanCM4i-v20190731

GEM5-NEMO3

GEM5-NEMO-v20211130

(*) This model_id tag is used internally in some parts of the CDS infrastructure to label the seasonal forecast data. In particular data which is archived on netCDF format will use this labelling. Currently this only applies to ocean variables contained in the seasonal-monthly-ocean dataset.
(a) Due to technical reasons, a new version of ECMWF SEAS5 data has been created using the keyword system=51. See details on Announcements (date 12/October/2022)

...

The only producing centre following this approach in this period was the UK MetOffice, and the increments on the value of 'system' were introduced on the May nominal start date each year. Specifically:

Forecasting centreForecasting system nameReal-time forecast
nominal start dates		CDS 'system' valueCDS 'model_id' (*)
UK MetOfficeGloSea5-GC2September 2017 to April 201812

HadGEM3-GC2.0-v20150825

May 2018 to April 201913
GloSea5-GC2-LIMay 2019 to April 202014HadGEM3-GC2.0-v20190305
May 2020 to February 2021

15

(*) This model_id tag is used internally in some parts of the CDS infrastructure to label the seasonal forecast data. In particular data which is archived on netCDF format will use this labelling. Currently this only applies to ocean variables contained in the seasonal-monthly-ocean dataset.

After March 2021

With the start of operations of MetOffice GloSea6 forecasting system, a new numeric labelling paradigm has been introduced with two main aims: on one hand, to keep the incremental labelling when needed, and on the other hand, make more transparent and user-friendly the mapping between different versions of the forecasting system and that 'system' keyword.

...

The following table lists the values of 'system' keyword used in the CDS for on-the-fly hindcasts systems:

Forecasting centreForecasting system nameReal-time forecast
nominal start dates		CDS 'system' valueCDS 'model_id' (*)
UK MetOfficeGloSea6March 2021 to February 2022600HadGEM3-GC3.2-v20200929
March 2022 to February 2023601
from March 2023602

(*) This model_id tag is used internally in some parts of the CDS infrastructure to label the seasonal forecast data. In particular data which is archived on netCDF format will use this labelling. Currently this only applies to ocean variables contained in the seasonal-monthly-ocean dataset.

Info
iconfalse

This document has been produced in the context of the Copernicus Climate Change Service (C3S).

The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of C3S on behalf of the European Union (Delegation agreement signed on 11/11/2014). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose.

The users thereof use the information at their sole risk and liability. For the avoidance of all doubt, the European Commission and the European Centre for Medium-Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view.

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