Articles | Volume 2, issue 2
https://doi.org/10.5194/ascmo-2-171-2016
https://doi.org/10.5194/ascmo-2-171-2016
14 Dec 2016
 | 14 Dec 2016

Weak constraint four-dimensional variational data assimilation in a model of the California Current System

William J. Crawford, Polly J. Smith, Ralph F. Milliff, Jerome Fiechter, Christopher K. Wikle, Christopher A. Edwards, and Andrew M. Moore

Data sets

UCSC CCS 1/10 degree 13-Year Ocean Model Historical Reanalysis Version 0.1 A. M. Moore, C. A. Edwards, H. Arango, E. Neveu, F. Fiechter, and P. Drake http://oceanmodeling.ucsc.edu/reanalccs13

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Short summary
We present a method for estimating intrinsic model error in a model of the California Current System. The estimated model error covariance matrix is used in the weak constraint formulation of the Regional Ocean Modeling System, four-dimensional variational data assimilation system, and comparison of the circulation estimates computed in this way show demonstrable improvement to those computed in the strong constraint formulation, where intrinsic model error is not taken into account.