Dear authors,

the manuscript is accepted, although few technical corrections have to be
made before final publication.

1) Please mentioned how the emissions in the boundary layer were treated in the
control run (as requested by referee #1). Was the emission distributed
equally over the 15 layers forming the Boundary layer in the model?
Or just at the surface level?

2) Please add the figure in the reply to the electronic supplement of the
manuscript. You should refer to these figures at the end of section 2.

3) The sentence about DOF "peaking" is still not fully clear.
Please reformulate mentioning that the DOFs are considered from the
ensemble of profiles.

4) Please reformulate and clarify very briefly what is meant with MOPITT
space (i.e. with the Averaging Kernels application),
as requested by referee #2.

5) Please reformulate the last paragraph of the conclusion, which should
be considered as outlook/hypothesis. The statement
is not corroborate by this study and this should be clear.

6) Please take particular care in the figure preparation to make them
hard-copy readable.


Andrea Pozzer