A Regional Ocean Reanalysis System for Coastal Waters of China and Adjacent Seas |
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| Authors: | HAN Guijun LI Wei ZHANG Xuefeng LI Dong HE Zhongjie WANG Xidong WU Xinrong YU Ting and MA Jirui |
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| Institution: | Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology,National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171,Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171 |
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| Abstract: | A regional ocean reanalysis system for the coastal waters of China and adjacent seas has been
developed by the National Marine Data and Information Service (NMDIS). It produces a dataset package called
CORA (China ocean reanalysis). The regional ocean model used is based on the Princeton Ocean Model with a
generalized coordinate system (POMgcs). The model is parallelized by NMDIS with the addition of the wave
breaking and tidal mixing processes into model parameterizations. Data assimilation is a sequential
three-dimensional variational (3D-Var) scheme implemented within a multigrid framework. Observations include
satellite remote sensing sea surface temperature (SST), altimetry sea level anomaly (SLA), and temperature/salinity
profiles. The reanalysis fields of sea surface height, temperature, salinity, and currents begin with January
1986 and are currently updated every year.
Error statistics and error distributions of temperature, salinity and currents are presented as a primary
evaluation of the reanalysis fields using sea level data from tidal gauges, temperature profiles, as well
as the trajectories of Argo floats. Some case studies offer the opportunity to verify the evolution of
certain local circulations. These evaluations show that the reanalysis data produced provide a good
representation of the ocean processes and phenomena in the coastal waters of China and adjacent seas. |
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| Keywords: | ocean reanalysis data coastal waters China adjacent seas sea temperature salinity currents ocean circulation |
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