Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Comparison of RIAMOM and MOM in Modeling the East Sea/Japan Sea Circulation

  • Lee, Ho-Jin (Division of Ocean Science, Korea Maritime University) ;
  • Yoon, Jong-Hwan (DSRC, Research Institute for Applied Mechanics, Kyushu University) ;
  • Kawamura, Hideyuki (DSRC, Research Institute for Applied Mechanics, Kyushu University) ;
  • Kang, Hyoun-Woo (Coastal & Harbor Engineering Laboratory, KORDI)
  • Published : 2003.09.30
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Abstract

The seasonal variations in the circulation of the water mass in the East Sea/Japan Sea have been simulated using a free surface primitive ocean model, RIAMOM (RIAM Ocean Model), comparing the results from GFDL-MOM1 (Geophysical Fluid Dynamics Laboratory Modular Ocean Model, version 1.1, hereafter MOM) with the GDEM (Generalized Digital Environmental Model) data. Both models appear to successfully reproduce the distinct features of circulation in the East Sea/Japan Sea, such as the NB (Nearshore Branch) flowing along the Japanese coast, the EKWC (East Korean Warm Current) flowing northward along the Korean coast, and the NKCC/LCC (North Korean Cold Current/Liman Cold Current) flowing southwestward along Korean/Russian coast. RIAMOM has shown better performance, compared to MOM, in terms of the realistic simulation of the flow field in the East Sea/Japan Sea; RIAMOM has produced more rectified flows on the coastal region, for example, the narrower and stronger NKCC/LCC than MOM has. There is however obvious differences between the model results and the GDEM data in terms of the calculation of the water mass; both models have shown a tendency to overpredict temperature and underpredict salinity below 50m; more diffusive forms of thermocline and halocline have been simulated than noted in GDEM data.

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References

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