Assessment of Assimilation Impact of Argo Float Observations in Marginal Seas around Korean Peninsula through Observing System Experiments

관측시스템 실험을 통한 한반도 근해 Argo 플로트 관측자료의 자료동화 효과 평가

  • Choo, Sung-Ho (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Chang, Pil-Hun (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Hwang, Seung-On (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Jo, Hyeong-Jun (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Lee, Johan (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Lee, Sang-Min (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Hyun, Yu-Kyung (Operational Systems Development Department, National Institute of Meteorological Sciences) ;
  • Moon, Jae-Hong (Department of Earth and Marine Sciences, College of Ocean Sciences, Jeju National University)
  • 추성호 (국립기상과학원 현업운영개발부) ;
  • 장필훈 (국립기상과학원 현업운영개발부) ;
  • 황승언 (국립기상과학원 현업운영개발부) ;
  • 조형준 (국립기상과학원 현업운영개발부) ;
  • 이조한 (국립기상과학원 현업운영개발부) ;
  • 이상민 (국립기상과학원 현업운영개발부) ;
  • 현유경 (국립기상과학원 현업운영개발부) ;
  • 문재홍 (제주대학교 해양과학대학 지구해양과학과)
  • Received : 2021.06.28
  • Accepted : 2021.08.20
  • Published : 2021.09.30


An Observing System Experiment (OSE) using Global Ocean Data Assimilation and Prediction System (GODAPS) was conducted to evaluate the assimilation impact of Argo floats, deployed by National Institute of Meteorological Sciences/Korea Meteorological Administration (NIMS/KMA), in marginal seas around Korean peninsula. A data denial experiment was run by removing Argo floats in the Yellow Sea and the East Sea from an operational run. The assimilation results show that Argo floats bring the positive impact on the analysis of ocean internal structure in both Yellow Sea and East Sea. In the East Sea, overall positive impact in the water temperature and salinity context is found, especially outstanding improvement from 300 to 500 m depth. In the Yellow sea, the assimilation impact on water temperature and salinity is also large within 50 m depth, especially greater impact than the East Sea in salinity. However, in the Yellow Sea, the influence of Argo floats tends to be restricted to the vicinity of Argo floats, because there was only one Argo float in the middle of the Yellow Sea during the experiment period. Given that the only limited number of Argo floats generally contribute in a positive way to the improvement of the GODAPS, further progress could be expected with adding more observations from Argo floats to current observing systems.



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