Find out how to access the archive (or historical data) stored in ECMWF's Meteorological Archive and Retrieval System (MARS)

There is an existing page here: Access to Archive data - but I think it is out of date.

Suggested structure and outline content for this page: 

What do we mean by archive (historical) data?

Use include to include a definition ...

At the moment it is a bit confusing because 'archive data' is used as a general term (to mean non-valid or expired data) AND it is used to refer to data in the archive catalogue; also sometimes the term historical is used.

Find out what archive data are available and what they cost

Explore the data - Direct people to web based catalogue: https://www.ecmwf.int/en/forecasts/datasets/search/

Find out what you can access and what the costs might be: see how to order archive (historical data)

We could direct people to the Product Requirements Catalogue  .... where they can get an archive licence: https://apps.ecmwf.int/shopping-cart/archive-orders/new

Some datasets are free (i.e. public): https://www.ecmwf.int/en/forecasts/datasets/search/?f%5B0%5D=sm_field_dataset_urls_filter%3Afield_dataset_public_url

Find out about the licence for the use of archive data

All archive data are covered by Creative Commons Licence ... link

Find out how to access archive data

• See how to access archive (historical) data.https://www.ecmwf.int/en/forecasts/datasets/archive-datasets
• ECMWF's archive data are stored within MARS (Meteorological Archival and Retrieval System) - link to MARS confluence space/section.

We need Copernicus links

 If you want to explore the open and free of charge (see Copernicus Licence for details) data of the Copernicus Climate Change Service (C3S)  please have a look here: 

What data and maps are available through C3S (Copernicus Climate Change Service)?

 If you want to explore the open and free of charge (see Copernicus Licence for details) data of the Copernicus Atmosphere Monitoring Service (CAMS) please have a look here:

What data and charts are available through CAMS (Copernicus Atmosphere Monitoring Service)?

A range of data related to atmospheric quality are available free of charge through the Copernicus Atmosphere Monitoring Service in the Atmosphere Data Store

For details on datasets and questions please have a look at the Copernicus knowledge base and Copernicus User Support Forum Home.