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2024 Vol.29, Issue 3

Article

Optimizing a Low-resolution Global Ocean Circulation Model Using MOM6

MOM6 저해상도 전지구 해양순환모델의 최적화 연구

HO CHAN PARK1
,
INSEONG CHANG1
,
HYUNKEUN JIN2
,
GYUNDO PAK3
,
YOUNG-GYU PARK4
,
YOUNG HO KIM5*
박 호찬1
,
장 인성1
,
진 현근2
,
박 균도3
,
박 영규4
,
김 영호5*
1Graduate Student, Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Korea
2Full-time Research Specialist, Ocean Circulation & Climate Research Department, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
3Senior Research Scientist, Ocean Circulation & Climate Research Department, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
4Principal Research Scientist, Ocean Circulation & Climate Research Department, Korea Institute of Ocean Science & Technology, Busan 49111, Korea
5Assistant Professor, Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Korea
1국립부경대학교 지구환경시스템과학부 해양학전공 대학원생
2한국해양과학기술원 해양순환기후연구부 무기계약직기술원
3한국해양과학기술원 해양순환기후연구부 선임연구원
4한국해양과학기술원 해양순환기후연구부 책임연구원
5국립부경대학교 지구환경시스템과학부 해양학전공 조교수
*Corresponding Author
31 August 2024. pp. 139-152
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Abstract

This study conducted various sensitivity experiments to assess and improve the performance of low-resolution global ocean circulation models. The MOM6 (Modular Ocean Model Version 6), developed by the Geophysical Fluid Dynamics Laboratory, was utilized. We focused on analyzing the effects of implementing the ePBL (energetics based planetary boundary layer) mixed layer scheme, including tidal simulation, and applying hybrid vertical coordinate system on the simulation accuracy of ocean circulation. The results revealed that the ePBL scheme effectively mitigated excessive mixed layer thickness and high temperature biases in the equatorial Pacific, while tidal simulations contributed to improving the oceanic structures in the Yellow Sea and the East Sea. Additionally, the hybrid vertical coordinate system enabled more accurate simulations of the vertical structure of temperature and salinity, enhancing model performance. This study proposes specific approaches to enhance the accuracy of ocean circulation models, contributing to global ocean and climate modeling efforts.

Keywords
Ocean circulation model
Ocean mixed layer scheme
Tide
Hybrid vertical coordinate system

이 연구에서는 GFDL (Geophysical Fluid Dynamics Laboratory)에서 개발한 해양순환모델인 MOM6 (Modular Ocean Model Version 6)를 사용하여 저해상도 전지구 해양순환모델의 성능을 평가하고 개선 방안을 모색하기 위해 다양한 민감도 실험을 수행하였다. 특히, ePBL (energetics based planetary boundary layer) 혼합층 방안의 적용, 조석 처방, 그리고 하이브리드 수직격자체계의 도입이 모델의 표층 수온과 염분 모의 성능에 미치는 영향을 분석하였다. 연구 결과, ePBL 혼합층 방안은 적도 태평양에서의 혼합층 두께의 과대 모의와 고온 편향을 완화하는 데 효과적이었으며, 조석 처방은 황해와 동해에서 해양 구조를 개선하는데 일부 기여하였다. 또한, 하이브리드 수직격자체계는 수온 및 구조를 보염분의 수직 다 정확하게 모의할 수 있게 하여 모델의 성능을 개선하였다. 이 연구는 해양순환모델의 정확성을 높이기 위한 구체적인 방안을 제시하고 있으며, 전지구적인 해양 및 기후 모델링의 성능 개선에 기여할 수 있을 것으로 기대한다.

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Information
  • Publisher :The Korean Society of Oceanography
  • Publisher(Ko) :한국해양학회
  • Journal Title :The Sea Journal of the Korean Society of Oceanography
  • Journal Title(Ko) :한국해양학회지 바다
  • Volume : 29
  • No :3
  • Pages :139-152
  • Received Date : 2024-04-25
  • Revised Date : 2024-06-19
  • Accepted Date : 2024-06-26
  • DOI :https://doi.org/10.7850/jkso.2024.29.3.139
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