Correctly using the Data Store to obtain Seasonal Forecast rasters

Datasets and Usage C3S - Datasets and Usage
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Hello,

I would like to download the raster or mesh data that this map is created from: Charts | Copernicus

I mean, as a file I can work with in GIS software, not as a PNG with all of the formattting provided by Copernicus.

However, I don’t understand what options I should select in this Data Store wizard: Seasonal forecast anomalies on single levels

In general, is there a method or manner for interpreting the source information on the ready-made graphic?

I understand “Variable”, and suppose I should choose “Ensemble: Ensemble mean” for Product type.

But the other options are confusing to me. For example, does it matter which “originating centre” I pick? What is “System”, and how should I know which to choose? And what does “leadtime month” mean?

I made choices that I thought would make sense, but I get a result which is different to the ready-made map, so suspect I’m doing something wrong.

Thanks in advance!

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Hi Alex, sorry for the slow response!

There are two resources linked below which might help, otherwise, feel free to follow-up again. In general, the graphical products always use the latest version from each system, you can find these define here: Summary of available data - Copernicus Knowledge Base - ECMWF Confluence Wiki. There are some notes on how to use the forms here: How to use the CDS interactive forms and CDS API for seasonal forecast datasets - Copernicus Knowledge Base - ECMWF Confluence Wiki.

1] C3S seasonal forecast product descriptions: C3S seasonal forecast product descriptions - Copernicus Knowledge Base - ECMWF Confluence Wiki
2] C3S seasonal forecast Jupyter Notebook on reproducing some of the products (single- rather than multi-system): Reproducing the single-system graphical products for additional variables — c3sSeasonal