Report on Common interfaces and standards for nesitng of air quality models

This is the first version of the report on interfaces and standards for harmonised nesting of air quality models, prepared for the project PASODOBLE. It describes the issues that are related to interfaces and nesting standards, some of which are not yet clear at the time of writing. This report therefore contains a discussion of these topics, including some proposed definitions of the nesting standards and suggestions for the interfaces. During the PASODOBLE project these issues will be further defined and it is expected that the second, final version of this report will contain the final definitions.