Parallelisms between sea surface temperature changes in the western tropical Atlantic (Guiana Basin) and high latitude climate signals over the last 140 000 years

Rama-Corredor, O.; Martrat, B.; Grimalt, J. O.; López-Otalvaro, G. E.; Flores, J. A.; Sierro, F.

doi:https://doi.org/10.5194/cp-11-1297-2015

Articles | Volume 11, issue 10

https://doi.org/10.5194/cp-11-1297-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Millennial-scale variability in the American tropics and...

https://doi.org/10.5194/cp-11-1297-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 11, issue 10

Research article

|

06 Oct 2015

Research article |

| 06 Oct 2015

Parallelisms between sea surface temperature changes in the western tropical Atlantic (Guiana Basin) and high latitude climate signals over the last 140 000 years

O. Rama-Corredor, B. Martrat, J. O. Grimalt, G. E. López-Otalvaro, J. A. Flores, and F. Sierro

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Final revised paper (published on 06 Oct 2015)
Supplement to the final revised paper
Preprint (discussion started on 02 Apr 2015)

Interactive discussion

Status: closed

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

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RC C312: 'Review of "Parallelisms between sea surface temperature changes in the western tropical Atlantic (Guiana basin) and high latitude climate signals over the last 140 000 years” by Rama-Corredor et al.', Anonymous Referee #1, 06 May 2015
- AC C1355: 'Description of the changes introduced into the manuscript following the indications of reviewer 1', Joan grimalt, 16 Aug 2015
RC C996: 'cp2015-16 comments', Anonymous Referee #2, 07 Jul 2015
- AC C1378: 'Description of the changes introduced into the manuscript following the indications of reviewer 2', Joan grimalt, 16 Aug 2015
EC C998: 'Annotated manuscript from Anonymous reviewer', Dunia Urrego, 08 Jul 2015
- AC C1382: 'Description of the changes introduced into the manuscript following the indications of the annotated manuscript', Joan grimalt, 16 Aug 2015

Peer-review completion

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

ED: Publish subject to technical corrections (02 Sep 2015) by Dunia H. Urrego

Dear authors,

Thanks for uploading responses to the reviewer’s comments, and for the high level of detail used in these responses. I have gone through the manuscript and the original reviews and I can appreciate how much the manuscript has improved thanks to the reviewers feedback. I think there are a few justifications and explanations presented in the responses to the reviewer’s comments that could be incorporated into the manuscript and that will provide further clarification to the reader. These are detailed below.

One of the main concerns of reviewer #1 related to the resolution of the SST record, and its suitability to address millennial-scale changes. You have provided a complete response to this concern, but it would be very useful to the reader if information from this response also appeared in the main manuscript. I refer specifically to the total number of samples and the average resolution, and making the case that the record is suitable to address millennial-scale changes.

Your decision on the timing of the last occurrence of P. obliquiloculata in the response to reviewers’ comments is well justified, but this is has not been incorporated into the manuscript. The reader is unlikely to review the discussion to find this information, therefore it would be more effective to add this justification to the methods section. I think this is what reviewer #2 intended by pointing this out, although I can appreciate this might not have come across.

Please also incorporate your response to reviewer #1’s comment on how the SST change has been calculated. The reviewer asks if this was calculated using only two adjacent samples. Your reply states that a new Figure has been added in the Supplementary material and provides additional information about how the change was calculated. However, it is unclear whether you have included an explanation of the calculation in the text.

The same applies for your response about the comparison of Cariaco reflectance with the SST record. Is the clarification in the response to reviewer’s comments included in the manuscript?

The English language has improved considerably. I would still encourage you to perform a final proof read before submitting the revised version for missed typos.

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AR by Joan grimalt on behalf of the Authors (08 Sep 2015) Author's response Manuscript

Short summary

The alkenone sea surface temperatures in the Guiana Basin show a rapid transmission of the climate variability from arctic to tropical latitudes during the last two interglacials (MIS1 and MIS5e) and warm long interstadials (MIS5d-a). In contrast, the abrupt variability of the glacial interval does follow the North Atlantic climate but is also shaped by precessional changes. This arctic to tropical decoupling occurs when the Atlantic meridional overturning circulation is substantially reduced.