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titleSeasonal forecast daily and subdaily data on single levels from 2017 to present

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

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02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

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03. Variable

Select the parameter(s) you are interested in.

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04. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that there could be differences in the options available depending on your selection of forecast or hindcast yearsyears in both the hindcast period and real-time forecasts are shown here together. You can find more details about hindcast and forecast years availability in the Start dates available in the CDS per forecast system page.

Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

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05. Month

Select the month of the initialization date of the model run(s) you are interested in.

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06. Day

Select the day of the initialization date of the model run(s) you are interested in.
Note that due to different production schedules, the available dates may differ between hindcasts and forecasts and between "originating centres".
You can find more details about the production schedules in the "Documentation" tabthe Description of the C3S multi-system table.

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07. Leadtime Hour

Select the lead time(s) you are interested in. This is the time, in hours, from the initialization date.
Bear in mind that some variables are available every 6 hours, and some every 24 hours. You will find that information in the full list of available parameters from the "Documentation" tab and also in the summary table shown in the "Overview" tab of this CDS dataset.
Note that the length of the outputs is at least 6 calendar months, but it may not be the same for all "originating centres".

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08. Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners

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09. Format

You can select the data format for your data retrieval.
Currently, just GRIB format is available for used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed by using the CDS API. You can find some related information in the "Documentation" tab.Image Removed

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09

10. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

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titleSeasonal forecast daily subdaily data on pressure levels from 2017 to present

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

Image RemovedImage Added

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

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03. Variable

Select the parameter(s) you are interested in.

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04. Pressure Level

Select the pressure level(s) for the variables you are interested in.

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05. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that there could be differences years in the options available depending on your selection of forecast or hindcast years.both the hindcast period and real-time forecasts are shown here together. You can find more details about hindcast and forecast years availability in the Start dates available in the CDS per forecast system page.

Please note that Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

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06. Month

Select the month of the initialization date of the model run(s) you are interested in.

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07. Day

Select the day of the initialization date of the model run(s) you are interested in.
Note that due to different production schedules, the available dates may differ between hindcasts and forecasts and between "originating centres".
You can find more details about the production schedules in the "Documentation" tabthe Description of the C3S multi-system table.

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08. Leadtime Hour

Select the lead time(s) you are interested in. This is the time, in hours, from the initialization date.
Note that the length of the outputs is at least 6 calendar months, but it may not be the same for all "originating centres".

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09.

Format

Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

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10. Format

You can select the data format for your data the data format for your data retrieval.
Currently, just GRIB format is available for used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed by using the CDS API. You can find some related information in the "Documentation" tab.

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10

11. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

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Monthly data

Outputs from the atmospheric component of the forecasting systems

You will find You will find two CDS catalogue entries for monthly statistics: monthly average, minimum, maximum and standard deviation are available for all initialization dates. Additionally, for real-time forecast initialization dates you will find the ingredients to calculate the forecast monthly anomalies: the forecast ensemble mean and the hindcast climate mean. The output of the different forecasting systems is available both for real-time forecasts (from 2017 onwards) and retrospective forecasts (referred to as hindcasts) for the period 1993-2016.

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titleSeasonal forecast monthly statistics on single levels from 2017 to present

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

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02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.
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03. Variable

Select the parameter(s) you are interested in.

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04. Product Type

Select the monthly product you are interested in.
Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

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05. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that there could be differences years in the options available depending on your selection of forecast or hindcast years.both the hindcast period and real-time forecasts are shown here together. You can find more details about hindcast and forecast years availability in the Start dates available in the CDS per forecast system page.

Please note that you must use the hindcast Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

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06. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

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07. Leadtime Month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

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08.

Format

Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

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09. Format

You can select the data format for your data retrieval.
Currently, GRIB format is used to store the data format for your data retrieval.
Currently, just GRIB format is available for C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed by using the CDS API. You can find some related information in the "Documentation" tab.

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09

10. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

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Expand
titleSeasonal forecast monthly statistics on pressure levels from 2017 to present

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

Image RemovedImage Added

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

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03. Variable

Select the parameter(s) you are interested in.

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04. Pressure Level

Select the pressure level(s) for the variables you are interested in.

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05. Product Type

Select the monthly product you are interested in.
Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

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06. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that there could be differences years in the options available depending on your selection of forecast or hindcast yearsboth the hindcast period and real-time forecasts are shown here together. You can find more details about hindcast and forecast years availability in the Start dates available in the CDS per forecast system page.

Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

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07. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

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08. Leadtime Month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

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09.

Format

Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

Image Added

10. Format

You can select the data format for your data the data format for your data retrieval.
Currently, just GRIB format is available for used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed by using the CDS API. You can find some related information in the "Documentation" tab.

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10

11. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

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Outputs from the ocean component of the forecasting systems

You will find

...

one CDS catalogue

...

entry for

...

monthly averages of ocean variables available for all initialization dates (both hindcasts and real-time forecasts

...

).

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titleSeasonal forecast monthly averages of global ocean variables

One dataset contains surface (or single level) parameters, the other contains variables on 11 pressure levels spanning 925 hPa to 10 hPa.

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titleSeasonal forecast anomalies on single levels from 2017 to present

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

Image RemovedImage Added

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres".
A full description of the use of the Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.
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03. Variable

Select the parameter(s) you are interested in.

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04.

Product Type

Forecast type

Select the monthly product type of the forecast you are interested in from real-time forecasts ("forecast") or retrospective forecasts ("hindcast").Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

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05. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that anomalies are just available for real-time forecasts start dates.

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06. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

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07.

Leadtime Month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

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08. Format

You can select the data format for your data retrieval.
Currently, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. You can find some related information in the "Documentation" tab.

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09. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

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Format

The individual data files in this dataset are stored in netCDF format and the multiple files from a single data request will be bundled together on a single file.
You can choose the format of your preference for that single file.

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08. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

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Post-processed data

You will find two CDS catalogue entries for real-time forecast monthly anomalies; each contains the anomalies for the ensemble mean for each system and the individual ensemble members.
Anomalies are just available for real-time forecasts start dates (from 2017 onwards).

One dataset contains surface (or single level) parameters, the other contains variables on 11 pressure levels spanning 925 hPa to 10 hPa.


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titleSeasonal forecast anomalies on single levels
Expand
titleSeasonal forecast anomalies on pressure levels from 2017 to present

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

Image RemovedImage Added

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres".
A full description of the use of the system keyword is available from the "Documentation" tab.

Image RemovedImage Added

03. Variable

Select the parameter(s) you are interested in.

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04.

Pressure Level

Product Type

Select the pressure level(s) for the variables monthly product you are interested in.

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05. Product Type

Select the monthly product you are interested in.
Note that the Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

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06

05. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that anomalies are just available for real-time forecasts start dates.

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07

06. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

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08

07. Leadtime Month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

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09. Format

You can select the data format for your data retrieval.
Currently, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. You can find some related information in the "Documentation" tab.

Image Removed

10. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

08. Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

Image Added

09. Format

You can select the data format for your data retrieval.
Currently, GRIB format is used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed. You can find some related information in the "Documentation" tab.

Image Added

10. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

Image Added


Expand
titleSeasonal forecast anomalies on pressure levels

01. Originating Centre

Select the name of the institution the forecasting system of your interest originates from.

Image Added

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres".
A full description of the use of the system keyword is available from the "Documentation" tab.

Image Added

03. Variable

Select the parameter(s) you are interested in.

Image Added

04. Pressure Level

Select the pressure level(s) for the variables you are interested in.

Image Added

05. Product Type

Select the monthly product you are interested in.
Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

Image Added

06. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that anomalies are just available for real-time forecasts start dates.

Image Added

07. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

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08. Leadtime Month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

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09. Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

Image Added

10. Format

You can select the data format for your data retrieval.
Currently, GRIB format is used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed. You can find some related information in the "Documentation" tab.

Image Added

11. Terms of Use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

Image Added


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.Image Removed