Dear authors,

Thank-you for your extensively revised manuscript. It has been re-reviewed by the original referee who requested the extension to 4 areas, and as you see they are satisfied with your changes. Their only further request is that you specify (p 17 & 19) the tendency of phase-lag changes of the Kelvin wave in KS according to length, width and depth change of JS. I suggest that the sensitivity would also be valuable, and that this is done in the form of specific examples, eg "if the bathymetry is increased by 1 m this leads to a shift in phase of x" etc. It should be quite quick to calculate.

Once that's done, the paper can go forward for typesetting. Please accept my apologies for the slowness of the review process on this paper, it has been a difficult year. I hope that next time you publish with OS we are able to respond more promptly!

Best wishes,
Joanne Williams

Many thanks for your final revisions to the manuscript. I am now passing it on to the next publication stage, with typesetting etc. The typesetter may find a few more points (they usually do!) but otherwise it is ready.
Best wishes, and thank-you for your patience
Jo Williams