Preprints
https://doi.org/10.5194/egusphere-2024-72
https://doi.org/10.5194/egusphere-2024-72
28 Feb 2024
 | 28 Feb 2024

Evaluation of CMIP6 Models Performance in Simulating Historical Biogeochemistry across Southern South China Sea

Winfred Marshal, Jing Xiang Chung, and Mohd Fadzil Bin Mohd Akhir

Abstract. This study evaluates the ability of Earth System Models (ESMs) from the Coupled Model Intercomparison Project Phase 6 (CMIP6) to simulate biogeochemical variables in the southern South China Sea (SCS). The analysis focuses on chlorophyll, phytoplankton, nitrate, and oxygen at annual and seasonal scales. The models' performance is assessed against Copernicus Marine Environment Monitoring Service (CMEMS) data using statistical metrics such as the Taylor diagram and Taylor skill score. The results show that the models generally capture the observed spatial patterns of biogeochemical variables but exhibit varying degrees of overestimation or underestimation. The performance of the models is also influenced by the season, with some models showing better performance during the southwest monsoon than the northeast monsoon. Overall, the top five best-performing models for biogeochemical variables are MIROC-ES2H, GFDL-ESM4, CanESM5-CanOE, MPI-ESM1-2-LR, and NorESM2-LM. The findings of this study have implications for researchers and end-users of the datasets, providing guidance for model improvement and understanding the impacts of climate change on the SCS ecosystem.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.

Journal article(s) based on this preprint

13 Sep 2024
Evaluation of CMIP6 model performance in simulating historical biogeochemistry across the southern South China Sea
Winfred Marshal, Jing Xiang Chung, Nur Hidayah Roseli, Roswati Md Amin, and Mohd Fadzil Bin Mohd Akhir
Biogeosciences, 21, 4007–4035, https://doi.org/10.5194/bg-21-4007-2024,https://doi.org/10.5194/bg-21-4007-2024, 2024
Short summary
Winfred Marshal, Jing Xiang Chung, and Mohd Fadzil Bin Mohd Akhir

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-72', Anonymous Referee #1, 23 Apr 2024
    • AC1: 'Reply on RC1', Winfred Marshal, 22 May 2024
  • RC2: 'Comment on egusphere-2024-72', Anonymous Referee #2, 08 May 2024
    • AC2: 'Reply on RC2', Winfred Marshal, 22 May 2024

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-72', Anonymous Referee #1, 23 Apr 2024
    • AC1: 'Reply on RC1', Winfred Marshal, 22 May 2024
  • RC2: 'Comment on egusphere-2024-72', Anonymous Referee #2, 08 May 2024
    • AC2: 'Reply on RC2', Winfred Marshal, 22 May 2024

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Reconsider after major revisions (29 May 2024) by Carolin Löscher
AR by Winfred Marshal on behalf of the Authors (31 May 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (04 Jun 2024) by Carolin Löscher
RR by Anonymous Referee #1 (18 Jun 2024)
RR by Anonymous Referee #2 (22 Jun 2024)
ED: Publish subject to minor revisions (review by editor) (03 Jul 2024) by Carolin Löscher
AR by Winfred Marshal on behalf of the Authors (12 Jul 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (31 Jul 2024) by Carolin Löscher
AR by Winfred Marshal on behalf of the Authors (02 Aug 2024)

Journal article(s) based on this preprint

13 Sep 2024
Evaluation of CMIP6 model performance in simulating historical biogeochemistry across the southern South China Sea
Winfred Marshal, Jing Xiang Chung, Nur Hidayah Roseli, Roswati Md Amin, and Mohd Fadzil Bin Mohd Akhir
Biogeosciences, 21, 4007–4035, https://doi.org/10.5194/bg-21-4007-2024,https://doi.org/10.5194/bg-21-4007-2024, 2024
Short summary
Winfred Marshal, Jing Xiang Chung, and Mohd Fadzil Bin Mohd Akhir
Winfred Marshal, Jing Xiang Chung, and Mohd Fadzil Bin Mohd Akhir

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
This study stands out for thoroughly examining CMIP6 ESMs ability to simulate biogeochemical variables in the southern South China Sea, an economically important region. It assesses variables like chlorophyll, phytoplankton, nitrate and oxygen on annual and seasonal scales. While global assessments exist, this study addresses a gap by objectively ranking 13 CMIP6 ocean biogeochemistry models' performance at a regional level, focusing on replicating specific observed biogeochemical variables.