Dear Authors,

thank you very much for your revisions and for providing the document with highlighted
modifications, which facilitates the editorial process significantly.
Before final publication of your manuscript in GMD two technical changes are required:

1) According to the journal guidelines (see web-page), the title must contain the version number of the
software used. Moreover, referee #2 is right stating that you do NOT yet describe a complete new
air quality transport model. Thus I recommend to change the title into

"Towards a new multiscale air quality transport model using the fully unstructured
anisotropic adaptive mesh technology of Fluidity (version 4.1.9)"

In section 4 you might want to add a sentence that v4.1.9 of Fluidity is not necessarily required,
but older versions might work as well.

2) I strongly recommend to add your scripts, code etc.for setting up your experiments with Fluidity as electronic supplement and state this in your section "Code availability".
If you absolutely prefer to not providing it like this, you need to add a statement in section
"Code availability" on how and where to get it on request (see also the journal guidelines for this).

Sincerely,

Patrick Jöckel

Dear Dr. Zheng et al.,

thank you very much for your revisions.
Only one minor technical correction:
On page 23 in line 20, please give a hint to the supplement, e.g.,
"We offer all setup files of the first three test cases in the Supplement ..."

Yours,

Patrick Jöckel