Sequential forecasting of the surface and subsurface conditions in the Japan Sea

Naoki Hirose, Hideyuki Kawamura, Ho Jin Lee, Jong Hwan Yoon

    Research output: Contribution to journalArticle

    31 Citations (Scopus)

    Abstract

    This study estimates a realistic change of the Japan Sea by assimilating satellite measurements into an eddy-resolving circulation model. Suboptimal but feasible assimilation schemes of approximate filtering and nudging play essential roles in the system. The sequential update of error covariance significantly outperforms the asymptotic covariance in the sequential assimilation due to the irregular sampling patterns from multiple altimeter satellites. The best estimates show an average rms difference of only 1.2°C from the radiometer data, and also explain about half of the sea level variance measured by the altimeter observation. The subsurface conditions associated with the mesoscale variabilities are also improved, especially in the Tsushima Warm Current region. It is demonstrated that the forecast limit strongly depends on variable, depth, and location.

    Original languageEnglish
    Pages (from-to)467-481
    Number of pages15
    JournalJournal of Oceanography
    Volume63
    Issue number3
    DOIs
    Publication statusPublished - Jun 1 2007

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    altimeter
    radiometer
    eddy
    sea level
    sampling
    sea
    assimilation
    forecast

    All Science Journal Classification (ASJC) codes

    • Oceanography

    Cite this

    Sequential forecasting of the surface and subsurface conditions in the Japan Sea. / Hirose, Naoki; Kawamura, Hideyuki; Lee, Ho Jin; Yoon, Jong Hwan.

    In: Journal of Oceanography, Vol. 63, No. 3, 01.06.2007, p. 467-481.

    Research output: Contribution to journalArticle

    Hirose, Naoki ; Kawamura, Hideyuki ; Lee, Ho Jin ; Yoon, Jong Hwan. / Sequential forecasting of the surface and subsurface conditions in the Japan Sea. In: Journal of Oceanography. 2007 ; Vol. 63, No. 3. pp. 467-481.
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