Frequently asked questions about general aspects

What is the difference between the TOAR data portal and the TOAR database?

The portal ( only provides pointers to datasets, primarily those, which we cannot include in the TOAR database of surface observations. For example, satellite, aircraft, model, or ozone sonde and lidar data. The TOAR database ( contains as many time series of stationary surface observations as we can get and process.

How can I publish the data I have used for a journal publication?

In case the journal publication is contributing to the Tropospheric Ozone Assessment Report the related datasets can be published as part of the TOAR community. Get in contact with the TOAR data centre team, who will work with the authors to create the appropriate metadata record(s) and deposit the data with EUDAT’s B2SHARE service (

Under which licence will the data be published?

CC-BY 4.0

Can I make sure that the data is not published before the journal paper has been published?

It is possible to put an embargo on the data until the journal paper is out but no longer than 12 months.

What is the scope of the data collection in TOAR-II, both with respect to the portal and the database?

We aim to provide as much information about TOAR-related data as possible. Specifically, we really want to have links to all datasets referenced in any of the TOAR-II papers included, or, if these are ground-based time series, the data to be included on the TOAR database. While the portal focuses on ozone data only, the database also includes precursor and meteorological observations.

What are the design principles for a good REST API? Can you support us in developing a REST API?

We are certainly willing to share our experiences with you, but we cannot provide much support for API development. Please write to if you want to get in touch with us.