Tidal resonance in the Gulf of Thailand

Cui, Xinmei; Fang, Guohong; Wu, Di

doi:https://doi.org/10.5194/os-15-321-2019

Articles | Volume 15, issue 2

https://doi.org/10.5194/os-15-321-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-15-321-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 2

Research article

|

29 Mar 2019

Research article |

| 29 Mar 2019

Tidal resonance in the Gulf of Thailand

Xinmei Cui, Guohong Fang, and Di Wu

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Final revised paper (published on 29 Mar 2019)
Preprint (discussion started on 24 Aug 2018)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Comment on “Tidal resonance in the Gulf of Thailand”', Anonymous Referee #1, 24 Sep 2018
- AC1: 'Response to referee #1', xinmei cui, 09 Jan 2019
- AC3: 'Response to referee #1', xinmei cui, 09 Jan 2019
RC2: 'Review of "Tidal Resonance in the Gulf of Thailand"', David Webb, 29 Oct 2018
- AC2: 'repsonse to Dr. Webb', xinmei cui, 09 Jan 2019

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by xinmei cui on behalf of the Authors (01 Feb 2019) Author's response Manuscript

ED: Referee Nomination & Report Request started (04 Feb 2019) by Neil Wells

RR by David Webb (17 Feb 2019)

Suggestions for revision or reasons for rejection

Review of OS-2018-97, version 2 of the discussion paper.

This is much improved. I have a few comments below but I will not need to see the paper again.

Abstract.

The fact that the gulf is dominated by diurnal tides does not indicate that the resonant frequency of the gulf is close to one cycle per day. It 'might be taken to indicate', but then as the paper shows there can be other reasons.

Later: "of the tidal resonance in the Gulf of Thailand". This should be "... the resonance affecting the Gulf ..."

Introduction

Re: "cycles per day". As a unit Wikipedia recommends 'cpd' (https://en.wikipedia.org/wiki/Cycle_per_second).

Section 2.1

Line 4: Try:

"R indicates the Earth’s radius, Ω its angular velocity, g gravity, H the
undisturbed water depth and τ the linearized bottom friction coefficient".

Line 7: Try:

"The numerical model covers the ocean lying between 99°E, 131°E, 1.5°N and 42°N."

Section 3.2.

Line 15: Personally I would not expect the response curves of linear model to be affected by the phases used to force the open boundary - but as you did this you should keep it in.

Line 20: "In the last cycle of 1024 hours". How long was the model run before this last cycle?

Section 4.

Line 11: Try:

"we conduct six numerical experiments. In experiment 1 ... " or "... . In Expt 1 ...". You do not need to repeat yourselves.

Line 19:

You refer to different "resonant frequencies" in the Gulf and the South China Sea. It would be more correct to refer to the peak amplitudes in the two regions - which are close together in frequency and appear to be due to the same underlying resonance.

Page 6, line 28.

I would suggest replacing 'tidal resonance' by 'tidal response' as there is no quarter wave resonance of the Gulf of Thailand.

Figure 3.

The figure has four parts. The caption only refers to two.

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ED: Publish subject to technical corrections (18 Feb 2019) by Neil Wells

AR by xinmei cui on behalf of the Authors (25 Feb 2019) Author's response Manuscript

Short summary

The resonant period of the Gulf of Thailand is potentially close to 1 day. However, the classic quarter-wavelength resonant theory fails to give a diurnal resonant period. In this study, we first perform a series of numerical experiments showing that the resonance of the South China Sea body has a critical impact on the resonance of the gulf. An idealised two-channel model that can reasonably explain the dynamics of the tidal resonance in the Gulf of Thailand is then established in this study.