海面高度計データを同化した黒潮変動予測実験   :   Assimilation Experiments of the Kuroshio Variabilities using TOPEX/Poseidon Altimetric Data 

作成者 淡路, 敏之, 小守, 信正, 石川, 洋一
日本十進分類法 (NDC) 452
内容 研究概要:As a first step towards constructing a regional ocean state estimation for the Kuroshio around Japan, we have studied the capability of short-range forecasting of the Kuroshio variability by assimilating TOPEX/Poseidon altimetric data into a regional 1 1/2-layer primitive equation model with a variational initialization scheme. Using the sea surface dynamic height data derived from TOPEX/Poseidon altimetry, we carried out prediction experiments of Kuroshio path variations from 1993 to 1994. Although we used a mean data from a 3-year simulation as the background field for initialization in our experiments, the Kuroshio path variation was nevertheless successfully reproduced for up to two months after the initialization. In particular, the eastward progression speed and the amplitude of the Kuroshio meander were quite similar to those observed. These results show a dramatic improvement in accuracy in both initialized velocity and vorticity fields and hence confirm the efficiency of our variational assimilation method for the initialization of short-range numerical forecasting of the Kuroshio path variations.
コンテンツの種類 研究報告書 Research Paper
DCMI資源タイプ text
ファイル形式 application/pdf
掲載誌情報 第2回CEReS環境リモートセンシングシンポジウム論文集 page.23-28 (1999)
言語 日本語

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