Estimation of Divergence/Convergence Observed with GPS Drifting Buoys and Ocean Radars in the Tsushima Strait

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  • 漂流ブイと海洋レーダーを用いた対馬海峡における表層収束・発散場の評価
  • ヒョウリュウ ブイ ト カイヨウ レーダー オ モチイタ ツシマ カイキョウ ニ オケル ヒョウソウ シュウソク ハッサンバ ノ ヒョウカ

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<p>Based on the work hypothesis of the relationship between the patchiness structure of marine plankton and the current field on the oceanic surface layer, on 27 November 2005, the surface current observations with three GPS drifting buoys and HF ocean radars were carried out in the Tsushima Strait. To clarify the relation between the primary production field and the divergence/convergence structure on the oceanic surface layer from a physical perspective, the validation was examined with special reference to the relationship between the observed values using ocean radar and the characteristics in situ based on each measurement accuracy.</p><p>It was shown that the estimated values of divergence/convergence observed surface velocities by HF ocean radars in the Tsushima Strait coincided well with those presumed from time variation of the triangular area formed by GPS drifting buoys. However, the possibility is suggested that great calculation error margin could be caused according to the presumption type used, the further evaluation and consideration of the presumption type are problems in future.</p>

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