Modelled glacier equilibrium line altitudes during the mid-Holocene in the southern mid-latitudes

Bravo, C.; Rojas, M.; Anderson, B. M.; Mackintosh, A. N.; Sagredo, E.; Moreno, P. I.

doi:https://doi.org/10.5194/cp-11-1575-2015

Articles | Volume 11, issue 11

https://doi.org/10.5194/cp-11-1575-2015

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

https://doi.org/10.5194/cp-11-1575-2015

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

Articles | Volume 11, issue 11

Research article

|

26 Nov 2015

Research article |

| 26 Nov 2015

Modelled glacier equilibrium line altitudes during the mid-Holocene in the southern mid-latitudes

C. Bravo, M. Rojas, B. M. Anderson, A. N. Mackintosh, E. Sagredo, and P. I. Moreno

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Final revised paper (published on 26 Nov 2015)
Supplement to the final revised paper
Preprint (discussion started on 06 Mar 2015)

Interactive discussion

Status: closed

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

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- Supplement

RC C200: 'General comments', Jose Úbeda, 02 Apr 2015
RC C268: 'Modelled glacier equilibrium line altitudes during the mid-Holocene in the southern mid-latitudes', Anonymous Referee #2, 23 Apr 2015
- AC C565: 'Reply to Anonymous Referee #2', Claudio Bravo, 08 Jun 2015
RC C299: 'Reviewer comment on "Modelled glacier equilibrium line altitudes during the mid-Holocene in the southern mid-latitudes"', Ann Rowan, 01 May 2015
- AC C571: 'Reply to A V Rowan', Claudio Bravo, 09 Jun 2015
EC C800: 'Editor's comment', Volker Rath, 25 Jun 2015

Peer-review completion

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

AR by Claudio Bravo on behalf of the Authors (21 Jul 2015) Author's response Manuscript

ED: Referee Nomination & Report Request started (22 Jul 2015) by Volker Rath

RR by Ann Rowan (11 Aug 2015)

RR by Anonymous Referee #2 (17 Oct 2015)

Suggestions for revision or reasons for rejection

The authors have carefully and successfully reorganized their paper. It has now become an interesting, well focused and useful contribution towards a better understanding of the mid-Holocene climate and glacial history of the southern mid-latitudes. Congratulations.

A few minor suggestions may be considered before publishing the paper in CP:

1. Page 3 lines 3 – 5. The details given for this study are a bit decoupled from the else more general summary of glacier dating in the study areas. I would leave such details for chapter 4.4.
2. P 3, l 14: remove the comma.
3. P 3, l 17: either “the/a hypothesis” or “hypotheses”
4. P 4, l 2: Here seems to be the right pace to add the necessary information on why the Pre-Industrial period is chosen as reference.
5. P 4, l 3 – 5: the sentence is a bit awkward; a comma after (MH hereafter) may help.
6. P 5, l5 and 9 – 14. I would just say “regional ELA” in line 5 and remove the sentence in lines 9 – 14. One cannot expect individual ELAs anyway when using regional model output without downscaling to high resolution local scale.
7. P 5, l 17 – 18: I would remove the statement about the absolute values because it is neither convincing (given the lack of precise ELA assessment for the PI) nor relevant for the study.
8. P 5, l 22 – 23: This sentence is superfluous and can be removed.
9. P 6, l 19: add runoff to melting; only both together contribute to ablation.
10. P 10, l 28: Start the sentence as “PI-ELA estimates …” for clarity.
11. P 11, l 1: do you refer to “present day” observed values or reconstructed (from moraine observations) PI values?
12. Figures 7 and 8: insert fonts are too small

Referee Report: PDF

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ED: Publish subject to minor revisions (review by Editor) (17 Oct 2015) by Volker Rath

AR by Claudio Bravo on behalf of the Authors (20 Oct 2015) Author's response Manuscript

ED: Publish as is (12 Nov 2015) by Volker Rath

AR by Claudio Bravo on behalf of the Authors (12 Nov 2015)

Short summary

We examine the climatic forcing of glacier expansion in the mid-Holocene (MH) by evaluating modelled glacier equilibrium line altitude (ELA) and climate conditions during the MH compared with pre-industrial (PI) time in the mid-latitudes of the Southern Hemisphere. Glaciers in both analysed regions have an ELA that is 15-33m lower than the PI during the MH. We postulate that the modelled ELA changes may help to explain larger glacier extents observed in the mid-Holocene in both regions.