The second round review of your paper is largely favourable, but has requested that you make additional minor revisions to remove lingering implications that strong flux attenuation was demonstrated by the observations. Because this request was initially made by all 3 reviewers in the first round, it is important that you make these additional changes to address this issue. The second round review also suggests that you describe in more detail the individual export methods and measurements that you compare. I agree that this would improve the paper, but also feel that it is somewhat beyond its scope, and has been done elsewhere (e.g. in the review by Buesseler et al., 2006). Therefore, to address this point, you may choose to only briefly expand the discussion of these techniques, with reliance mainly on citations. Please return your revised text with your changes clearly marked.

Dear Authors,
Thank you for your careful revisions following the second round review. Please complete the following list of technical corrections and return your manuscript for preparations for publication.
Associate Editor

Technical corrections
Line Number Correction
33 add a comma after plateau, to read “...over the plateau, and to deep-ocean...”
36-37 change “for the significant reduction in POC flux” to “for the low POC flux”
(This is a required correction to meet the perspectives of all reviews that reduction (i.e. attenuation) of flux has not been demonstrated, whereas low flux was measured.
42 change "vertical" to "downward" (biogenic particles are not dense enough to sink vertically with respect to the earth reference)
43 change “carbon in the ocean surface” to “carbon from the ocean surface”
45 change “ to 10 Pg C” to “and 10 Pg C” to accord with the preposition “between”
61 change “highlight that iron limits” to “highlight that the lack of iron limits”
75 change “POC export from naturally fertilized blooms” to “POC export over seasonal cycles from naturally fertilized blooms” (because many export measurements on shorter timescales have been done already by the KEOPS program.
84 add Jouandet et al., 2011 to the citation of Picheral et al, 2010, because it appears that the Picheral paper did not estimate export, whereas this aspect of the UVP technique was the focus of Jouandet et al., 2011.
89 consider adding Jouandet et al, 2008 to the citation of Blain and Pollard papers, because it was the Jouandet et al, 2008 paper that constructed the full seasonal DIC budget.
141 change “global Ocean” to “global ocean”
167 change “for sediment trap” to “for the sediment trap”
211 change “milliQ” to “Milli-Q” to be consistent with other uses later in paragraph
221 change “Hydrochloric” to “hydrochloric”
263 change “an integrated current” to “an effective eastward current” (because the unsmoothed integral would have a significantly higher value – i.e. the mean).
281 change “p>0,01” to “p>0.01”
300 change “were” to “where”
391 change “pressure that support” to “pressure that supports”
400 change “increasing contribution” to “increasing contributions”
413 change “chlorophyll maximum” to “chlorophyll maxima”
416 change “productivity feature” to “productivity features”, and add a comma “In support of this, detailed...”
417 change “highlight” to “highlights”
446 srping should be spring
455 define the acronym UVP at this first occurrence in this section (underwater video profiler)
468-70 should be written “at 350m were ....(Table 3), values close to ....” and “POC export at 330 m from the gel trap was 0.7..”
505-506 should be written “ocean was also reported by Laurenceau...2015) who associated this characteristic with a HBLE...”
525 change “may represents” to “may reflect”
527 remove the word “vertical”
545 change heterotriophic to heterotrophic
Table 3.
Change title to “Summary of estimates” ( a synthesis goes beyond a simple compilation) and “at station A3 from the KEOPS cruises’ (not the KEOPS1 cruise)
Ebersbach and Trull, 2008 used a fractal (power) law for aggregates and a constant C conversion for fecal pellets. So change “and constant C conversion factor” to “and both constant and power law C conversion factors”
Figure 3. Panel f y-axis label is missing, and should read “Current direction”