Dear authors,

both reviewers have carefully reviewed you manuscript and have raised a number of questions which you have addressed in you response letter. However, I still feel that some of the major concerns of the reviewer's need some further clarification, e.g. comment of reviewer #2:
"3. The lack of detectable DMSP concentrations is obviously surprising. Although the
authors offer possible solutions to this conundrum, the fact remains that they are able
to detect a by-product of DMSP degradation but not DMSP itself, known to be, in many
circumstances, orders of magnitude higher than DMS. It is difficult to believe that 30
days worth of samples within a diverse community of phytoplankton did not generate
a single detectable nmol of DMSP. Some loss can be explained through the presence
of acid-sensitive species (colonial Phaeocystis etc.), but the authors rule this out them-
selves as an important process by specifying that this type of phytoplankton accounted
for less than 10% of the community. In fact cryptophytes and chlorophytes dominated
the community. Various species of these two groups are known to produce DMSP
(Keller et al 1989) but not known to be sensitive to the acid treatment. As stated by the
authors, a methodological problem can probably explain these results."
has not been addressed in sufficient detail. I would find it disappointing if methodological problems would be the sole explanation for the observed patterns...
Im my opinion, the study in the fjord should add to the observations retrieved from the mesocosm experiment, but it should not represent a full story by itself.

Therefore, I ask you to carefully address all issues raised by the reviewers in a revised version of the manuscript. Please keep in mind to have the manuscript as focussed and concise as possible.

Dear authors,

as you can see: both reviewers are positive about your revised manuscript and recommend "publish subject to technical corrections"!
Please include all suggested changes (in particular those of reviewer #2) and, thereafter, I will accept your manuscript for publication in BGE.
Many thanks and best wishes,
yours Hans-Peter