Evaluation of Ocean Biogeochemistry Simulation within NEMO-TOPAZ, a Newly Developed Ocean Biogeochemistry Model
As a result of the analysis, NEMO-TOPAZ has over-simulated the concentration of surface chlorophyll in the seas where the chlorophyll concentration (Tropical Pacific Ocean, high-latitude Northern hemispheric seas, and the Antarctic) is higher than other seas. Though compared models over-estimated in these regions as well, the difference of error was larger for NEMO-TOPAZ. Although chlorophyll errors in NEMO-TOPAZ were related to overly prescribe iron deposition from the atmosphere. When the smaller values of iron deposition from NEMO-PISCES was diagnosed instead, chlorophyll concentration was reduced As a result of RMSE of surface biogeochemistry variables, alkalinity and DIC comparatively showed good reproduction performance in NEMO-TOPAZ, but nitrate, phosphate, silicate, and DO were simulated with lesser quality than the others. Surface biogeochemistry variable errors from analyzed models were distinctly displayed in the Antarctic Ocean which displayed more fluctuations than other seas. NEMO-TOPAZ represented well the vertical structures of biogeochemical variables in the Pacific and the Atlantic Ocean than NEMO-PISCES.
This work was funded by the Korea Meteorological Administration Research and Development Program under Grant KMI (KMI2018-03513). The main calculations were performed by using the supercomputing resource of the Korea Meteorological Administration (National Center for Meteorological Supercomputer)