Estimating the geostrophic velocity obtained by HF radar observations in the upstream area of the Kuroshio

Ryoko Tokeshi, Kaoru Ichikawa, Satoshi Fujii, Kenji Sato, Shoichiro Kojima

研究成果: ジャーナルへの寄稿記事

10 引用 (Scopus)

抄録

A method to extract geostrophic current in the daily mean HF radar data in the Kuroshio upstream region is established by comparison with geostrophic velocity determined from the along-track altimetry data. The estimated Ekman current in the HF velocity is 1.2% (1.5%) and 48° (38°)-clockwise rotated with respect to the daily mean wind in (outside) the Kuroshio. Furthermore, additional temporal smoothing is found necessary to remove residual ageostrophic currents such as the inertial oscillation. After removal of the ageostrophic components, the HF geostrophic velocity agrees well with that from the altimetry data with rms difference 0.14 (0.12) m/s in (outside) the Kuroshio.

元の言語英語
ページ(範囲)711-720
ページ数10
ジャーナルJournal of Oceanography
63
発行部数4
DOI
出版物ステータス出版済み - 12 1 2007

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altimetry
radar
smoothing
oscillation
comparison
method
removal

All Science Journal Classification (ASJC) codes

  • Oceanography

これを引用

Estimating the geostrophic velocity obtained by HF radar observations in the upstream area of the Kuroshio. / Tokeshi, Ryoko; Ichikawa, Kaoru; Fujii, Satoshi; Sato, Kenji; Kojima, Shoichiro.

:: Journal of Oceanography, 巻 63, 番号 4, 01.12.2007, p. 711-720.

研究成果: ジャーナルへの寄稿記事

Tokeshi, Ryoko ; Ichikawa, Kaoru ; Fujii, Satoshi ; Sato, Kenji ; Kojima, Shoichiro. / Estimating the geostrophic velocity obtained by HF radar observations in the upstream area of the Kuroshio. :: Journal of Oceanography. 2007 ; 巻 63, 番号 4. pp. 711-720.
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