Advances in Atmospheric Sciences

, Volume 30, Issue 4, pp 974–982 | Cite as

A new version of regional ocean reanalysis for coastal waters of China and adjacent seas

  • Guijun Han (韩桂军)
  • Wei Li (李 威)
  • Xuefeng Zhang (张学峰)
  • Xidong Wang (王喜冬)
  • Xinrong Wu (吴新荣)
  • Hongli Fu (付红丽)
  • Xiaoshuang Zhang (张晓爽)
  • Lianxin Zhang (张连新)
  • Dong Li (李 冬)
Article

Abstract

A new regional ocean reanalysis over multiple decades (1958–2008) for the coastal waters of China and adjacent seas has been completed by the National Marine Data and Information Service (NMDIS) under the CORA (China Ocean ReAnalysis) project. Evaluations were performed on three aspects: (1) the improvement of general reanalysis quality; (2) eddy structures; and (3) decadal variability of sea surface height anomalies (SSHAs). Results showed that the quality of the new reanalysis has been enhanced beyond ∼40% (39% for temperature, 44% for salinity) in terms of the reduction of root mean squared errors (RMSEs) for which the reanalysis values were compared to observed values in the observational space. Compared to the trial version released to public in 2009, the new reanalysis is able to reproduce more detailed eddy structures as seen in satellite and in situ observations. EOF analysis of the reanalysis SSHAs showed that the new reanalysis reconstructs the leading modes of SSHAs much better than the old version. These evaluations suggest that the new CORA regional reanalysis represents a much more useful dataset for the community of the coastal waters of China and adjacent seas.

Key words

regional ocean reanalysis China ocean reanalysis (CORA) improved quality of reanalysis 

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Copyright information

© Chinese National Committee for International Association of Meteorology and Atmospheric Sciences, Institute of Atmospheric Physics, Science Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Guijun Han (韩桂军)
    • 1
  • Wei Li (李 威)
    • 1
  • Xuefeng Zhang (张学峰)
    • 1
  • Xidong Wang (王喜冬)
    • 1
  • Xinrong Wu (吴新荣)
    • 1
  • Hongli Fu (付红丽)
    • 1
  • Xiaoshuang Zhang (张晓爽)
    • 1
  • Lianxin Zhang (张连新)
    • 1
  • Dong Li (李 冬)
    • 1
  1. 1.Key Laboratory of Marine Environmental Information Technology, State Oceanic AdministrationNational Marine Data and Information ServiceTianjinChina

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