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Fig. 14.8
An example of the surface analysis for the 4D-Var cycle starting on 2 Feb., 2012 as part
of the near real-time system. (
a
)
prior
SST, (
b
) SST increment, (
c
)
prior
sea surface salinity (SSS),
(
d
) SSS increment, (
e
)
prior
sea surface height (SSH) and (
f
) SSH and increments
14.6
Summary
Our aim in this chapter is to demonstrate that ocean data assimilation has reached a
maturity whereby sophisticated, state-of-the-art systems have been developed for a
widely used community ocean model. The ROMS 4D-Var system has features that
are comparable to those used in some operational NWP systems, and this article
demonstrates that it is now possible to compute regional ocean analyses at eddy
resolving resolutions to generate not only historical circulation estimates but also
analyses in near real-time. The ROMS 4D-Var system used here is freely available
to the ocean modeling community at large (
http://myroms.org
)
, and the experience
gained from the activities described here will provide valuable guidance for future
efforts in the California Current system and elsewhere.
Acknowledgements
The authors gratefully acknowledge the past and continuing support of the
U.S. National Science Foundation, the U.S. Office of Naval Research (N00014-10-1-0476), and the
U.S. National Oceanic and Atmospheric Administration (CeNCOOS Award NA08NOS4730282).
This material is based on work supported by the National Science Foundation under Grant No.
1061434. Any opinions, findings, and conclusions or recommendations expressed here are those
of the authors and do not necessarily reflect the views of the National Science Foundation.
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