CSIB v1 (Canadian Sea-ice Biogeochemistry): a sea-ice biogeochemical model for the NEMO community ocean modelling framework

Hayashida, Hakase; Christian, James R.; Holdsworth, Amber M.; Hu, Xianmin; Monahan, Adam H.; Mortenson, Eric; Myers, Paul G.; Riche, Olivier G. J.; Sou, Tessa; Steiner, Nadja S.

doi:https://doi.org/10.5194/gmd-12-1965-2019

Articles | Volume 12, issue 5

https://doi.org/10.5194/gmd-12-1965-2019

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

https://doi.org/10.5194/gmd-12-1965-2019

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

Articles | Volume 12, issue 5

Development and technical paper

|

15 May 2019

Development and technical paper |

| 15 May 2019

CSIB v1 (Canadian Sea-ice Biogeochemistry): a sea-ice biogeochemical model for the NEMO community ocean modelling framework

Hakase Hayashida, James R. Christian, Amber M. Holdsworth, Xianmin Hu, Adam H. Monahan, Eric Mortenson, Paul G. Myers, Olivier G. J. Riche, Tessa Sou, and Nadja S. Steiner

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Final revised paper (published on 15 May 2019)
Supplement to the final revised paper
Preprint (discussion started on 23 Aug 2018)

Interactive discussion

Status: closed

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

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RC1: 'Review for "CSIB v1: a sea-ice biogeochemical model for the NEMO community ocean modelling framework" by Hayashida et al.', Achim Randelhoff, 19 Sep 2018
RC2: 'Review of the paper “CSIB v1: a sea-ice biogeochemical model for the NEMO community ocean modelling framework” by Hayashida H. et al.', Anonymous Referee #2, 02 Oct 2018
RC3: 'Review comments for gmd-2018-191', Anonymous Referee #3, 04 Oct 2018
AC1: 'final response', Hakase Hayashida, 04 Feb 2019
AC2: 'final response supplement', Hakase Hayashida, 04 Feb 2019

Peer-review completion

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

AR by Hakase Hayashida on behalf of the Authors (04 Feb 2019) Author's response Manuscript

ED: Referee Nomination & Report Request started (19 Feb 2019) by Andrew Yool

RR by Anonymous Referee #3 (28 Feb 2019)

Suggestions for revision or reasons for rejection

Review Comments
Geoscientific Model Development (Ms. No. gmd-2018-191)

Title:
CSIB v1: a sea-ice biogeochemical model for the NEMO community
ocean modelling framework

Authors:
Hakase Hayashida, James R. Christian, Amber M. Holdsworth, Xianmin Hu, Adam H. Monahan, Eric Mortenson, Paul G. Myers, Olivier G. J. Riche, Tessa Sou, and Nadja S. Steiner

#Summary
The authors sincerely responded to most review comments. In particular, my major concerns are resolved. On the other hand, I am not satisfied with some parts yet. The detailed comments are described below.

#Detailed Comments

>Line 1 and others
Terminology of “process-based model” does not remind potential readers of “numerical models”. Actually, there is a “process-based conceptual model”. I would suggest “process-based numerical models”.

>Line 8 in Page 19
My question was “what kinds of formulation or parameters are necessary to represent mat and stand contributions?” Do the authors assume that only parameter values (e.g., maximum growth rate) are different for “another state variable” or model formulation itself should be definitely changed to represent those communities?

>Line 29 in Page 23
A sentence “Using these higher i0 reduces light limitation for ice algal growth” is still misleading. Even though light intensity at ice bottom is overestimated, it is possible that formulation and parameter values are tuned for reasonable light limitation. For example, if strong-light inhibition is assumed, higher i0 may enhance light limitation. I would suggest that the authors revise this part again.

>Figure 4
I assumed that an increase in vertical resolution was directly linked to an increase in vertical layers. So, I feel to need a description that the resolution below the upper layers becomes slightly coarser in this configuration. Such information would be important especially for physical modelers.

>Table 3
Unit of eddy diffusivity should be m^2/s (cf. “^” is a latex style). Minus should be removed.

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RR by Achim Randelhoff (06 Mar 2019)

RR by Anonymous Referee #2 (18 Mar 2019)

ED: Publish subject to minor revisions (review by editor) (21 Mar 2019) by Andrew Yool

AR by Hakase Hayashida on behalf of the Authors (11 Apr 2019) Manuscript

ED: Publish subject to technical corrections (29 Apr 2019) by Andrew Yool

AR by Hakase Hayashida on behalf of the Authors (01 May 2019) Author's response Manuscript

Short summary

Ice algae, the primary producer in sea ice, play a fundamental role in shaping marine ecosystems and biogeochemical cycling of key elements in polar regions. In this study, we developed a process-based numerical model component representing sea-ice biogeochemistry for a sea ice–ocean coupled general circulation model. The model developed can be used to simulate the projected changes in sea-ice ecosystems and biogeochemistry in response to on-going rapid decline of the Arctic.