11/December/2023
With the release of December 2023 forecasts (10th December 2023) a new view of the SST indices time series have been included for the ENSO regions in the C3S seasonal graphical products (https://climate.copernicus.eu/charts/packages/c3s_seasonal)
In addition to the plot showing individual ensemble members a new time series plot is now available showing some of the percentiles for each month's distribution. This was already available for the IOD indices and it has been now also extended to ENSO indices.
22/November/2023
Please note that a "data gap" issue has been documented in our C3S Seasonal Forecast known issues page affecting availability of MetOffice system 602 hindcast data for December nominal start dates (see details for issue G10. in the "Data gaps" table)
10/November/2023
Please note that a "data gap" issue has been documented in our C3S Seasonal Forecast known issues page affecting availability of MetOffice system 602 hindcast data for November nominal start dates (see details for issue G10. in the "Data gaps" table)
8/September/2023
Please note that a "data gap" issue has been documented in our C3S Seasonal Forecast known issues page affecting availability of MetOffice system 602 data for 8/August/2023 (see details for issue G10. in the "Data gaps" table)
9/August/2023
Please note that a "data gap" issue has been documented in our C3S Seasonal Forecast known issues page affecting availability of MetOffice system 602 data for 15/July/2023 (see details for issue G9. in the "Data gaps" table)
20/July/2023
New C3S seasonal forecast products available: 10m wind speed and sea ice concentration plots; additional documentation and training materials
Soon after the release of our July 2023 seasonal forecasts new features have been made available to users of the C3S seasonal forecast service:
- New graphical products for 10m wind speed and sea ice concentration
- A new Copernicus Knowledge Base (CKB) article describing the processing performed to create all C3S seasonal forecast products
C3S seasonal forecast product descriptions - A new Jupyter Notebook included in the "C3S Data Tutorials" training materials showing how to produce some verification metrics and scores equivalent to those currently provided in the CKB:
https://ecmwf-projects.github.io/copernicus-training-c3s/sf-verification.html
9/June/2023
New C3S seasonal forecast products available: total column water quantities data and SST indices verification plots
With the release of our June 2023 seasonal forecasts a couple of additions have been made to the offering of the C3S seasonal forecast service:
- New variables for water quantities integrated over the whole atmospheric column (water vapour, cloud liquid water and cloud ice water) are available. Initially, in June 2023, these data variables are available from ECMWF SEAS5, CMCC SPS3.5 and DWD GCFS2.1.
- New verification plots have been added to our C3S seasonal forecasts verification plots page, including correlation for SST-based indices (NINO regions and Indian Ocean Dipole)
Please also note that a "data gap" issue has been documented in our C3S Seasonal Forecast known issues page affecting availability of NCEP CFS2 data for 22/May/2023 (see details for issue G8. in the "Data gaps" table)
10/March/2023
New C3S seasonal forecast dataset and earlier publication date
With the release of our March 2023 seasonal forecasts a new dataset has been included, containing global ocean monthly data for a set of variables in the upper part of the ocean.
More details here: Seasonal forecast monthly averages of ocean variables
Additionally, we would like to remind our users that starting today, 10th March 2023, all the products from the C3S seasonal forecast component are made publicly available on a slightly earlier schedules:
- 6th of the month at 12 UTC: ECMWF data will be available
- 10th of the month at 12 UTC: the remaining forecast systems data and all graphical products will be available
1/March/2023
Summary of new features in C3S seasonal forecast service
Around the release of our March forecast a few new features enhancing the service are being put in place, from changes in the publication date of the data and products, to the inclusion of new features in the web application displaying our graphical products, and including information about verification of the forecast systems. A new seasonal forecast dataset will be published in the CDS catalogue, as described below.
- Changes to publication dates: all graphical and data products are now published earlier than usual. Specifically:
- 6th of the month at 12 UTC: ECMWF data will be available
- 10th of the month at 12 UTC: the remaining forecast systems data and all graphical products will be available
- Change to the graphical products web page:
- A new application using ECMWF's OpenCharts engine integrated in the C3S website will replace the current page from 1st March 2023 at 12UTC
- WARNING: With this change the URL will be affected, and the URL for the new starting point through the graphical products will now be: http://climate.copernicus.eu/charts/packages/c3s_seasonal/
- The new interface introduces some useful features, among others:
- Chartsets: allowing users to show side-by-side graphical products belonging to the same "chartset group" (gray bubbles above the plot thumbnail title).
- Share: this allows users to obtain a widget to be embedded in a web page or to share a given plot over social networks.
- Export: with the enhancements in this feature, on top of being able to export the plot and save it as an image (PNG/PDF), users will have access to an API allowing them to programatically access the plots of their choice.
- New contents in the graphical products:
- Starting from the February 2022 real-time forecast, monthly plots will be now also available, in addition to the 3-month aggregations in the new web interface
- Enhanced documentation with information about verification:
- Some verification metrics and scores for all current forecast systems, and the multi-system combination, will be made available as part of the C3S seasonal forecast documentation:
C3S seasonal forecasts verification plots - A Jupyter Notebook will be also soon released (date yet to be confirmed) allowing users to reproduce those plots and giving them a starting point to create similar ones for the variables of their interest.
- Some verification metrics and scores for all current forecast systems, and the multi-system combination, will be made available as part of the C3S seasonal forecast documentation:
- New CDS dataset with ocean variables:
- A new dataset containing 1-month averages of 2-D fields for variables coming from the ocean component of the contributing forecast systems.
- The dataset called "Seasonal forecast monthly averages of ocean variables" will be available here: http://cds.copernicus-climate.eu/cdsapp#!/dataset/seasonal-monthly-ocean
- The dataset will be published with the update of the March real-time forecast at 12UTC on the 10th March 2023
13/Jan/2023
Introduction of new features in plots and data
...
- New observational dataset in SST indices (NINO, IOD) plots: ERA5 SST has been introduced to substitute NCEP OIv2. This affects all new plots created from January 2023, specifically all new real-time forecast plots released but also the updates with new observations to previously released plots (: from MarchApril/2022 for NINO indices (March/2022 in the case of C3S multi-model and ECCC multi-model) and May/2022 for IOD)
- New pressure level (1000hPa) available from UK MetOffice GloSea6 data
...