Dear Authors,

thank you very much for your revision and your detailed
replies. However, before final publication in ACP two issues
still need to be resolved (besides a typo on page 15 in line 14):

1) As referee #1 points out, there might be a potential issue
with inter-hemispheric transport in TM5. Even though you are probably not able
to resolve this issue within the scope of your study, it must be
mentioned/discussed (with references) in the manuscript
(the latter must stand on its own, without readers
beeing forced to read the previous discussion). Thus, please add a short
paragraph on this where appropriate.

2) Both referees raised their concern about using meteo-data (ECMWF operational
analyses) which are not consistent over the studied period. As you mentioned the
vertical resolution changed, but also the assimilated data.
In addition you also modified the vertical resolution of TM5 in the studied
period.
Again, even though you might not be able to reveal the impact of those
inconsistencies within the present study, these important issued need to
be discussed in the manuscript, not only in the on-line discussion.
Thus, please add a short paragraph where appropriate, to make the reader
aware of the issues and briefly discuss it as in your replies.

Yours,

Patrick Jöckel

Dear Authors,

thank you very much for your quick revision.

Yours,

Patrick Jöckel