We thank C. Hannah, K.-T. Tee, and A. van der Baaren of BIO for their constructive comments on a draft of this paper. J. Wang acknowledges the support mainly from the NSERC of Canada through a Government Lab Postdoctoral Fellowship held at the Bedford Institute of Oceanography (90%), partly from EVOS Trusteeship Council via the Prince William Sound Science Center (Cordova, Alaska) (5%), and partly from USCG and NOAA for the South Florida Oil Spill Research Center, to the University of Miami (5%). The authors thank one anonymous reviewer and Dr. J. Oberhuber for their very constructive comments that helped improve the presentation by clarifying some terminology and listing numerical schemes some ocean models use (Table 1).
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