Thank you for revising the manuscript. Given the amount of changes, I will have to ask the same reviewers to evaluate the new version, but before that, please rewrite new Figures 3C and 3D. I belive these panels show power spectral density. If so, the y-axis is not just "Amplitude". (Please also add the unit.) It is well known that power spectral density requires accompanying confidence interval for comparision purposes. Please add confidence intervals. Once these two panels are updated appropriately, I will send the manuscript to the reviwers.

My decision might read "Reconsider after major revisions" but I mean "Ask the referees for a further review after technical corrections", which does not appear in my choice on the system.

Thank you for your patience; we now have reviewers' comments to the revision. Both reviewers are mostly satisfied with the revision and suggested a few minor but important points for further improvements. Once these are addressed, the manuscript is ready for publication. Thank you for choosing Ocean Science.

L.100, I think "29 days" for "0.035 cpd" and "7days" for "0.15 cpd". The same for the caption for Fig.2.