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首页> 外文期刊>Journal of oceanography >Comparison of Sea Surface Heights Observed by TOPEX Altimeter with Sea Level Data at Chichijima
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Comparison of Sea Surface Heights Observed by TOPEX Altimeter with Sea Level Data at Chichijima

机译：用TOPEX高度计观测的海面高度与秩父岛的海平面数据的比较

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摘要

The sea surface heights (SSHs) observed by the TOPEX altimeter are compared with tide gauge data at Chichijima in Ogasawara (Bonin) Islands and hydrographic data taken around the islands, in order to quantitatively verify the altimeter observations and oceanic tide corrections by three tide models proposed by Cartwright and Ray (1991), Ray et al. (1994), and Ma et al. (1994). First, performance of the new tide models is assessed by comparing tidal variations consisting of diurnal and semi-diurnal constituents with the tide gauge data at Chichijima. The tide model proposed by Ray et al. gives the smallest root-mean-squared (rms) difference of 2.61 cm. Errors in amplitude and phase in each tide model are evaluated by spectral analysis. The TOPEX SSHs corrected by the tide models are compared with sea level data at Chichijima. A long-term variation of a period of about 1 year is found in the residual between the SSHs and the Chichijima sea levels. This variation is also found in the difference between the dynamic height anomalies calculated from hydrographic data around the island and the Chichijima sea levels. By subtracting the long-term variation, the rms difference between the TOPEX SSHs and the Chichijima sea levels is reduced to about 4 cm and the slope of the regression line is improved to unity. The residual shows variations related to aliasing caused by incompleteness of the ocean tide correction with the repeat cycle of the altimeter observation.
机译：将TOPEX高度计观测到的海平面高度（SSHs）与小ara原（Bonin）群岛Chichijima的潮汐仪数据和岛屿周围的水文数据进行比较，以便通过三种潮汐模型定量验证高度计的观测值和海洋潮汐校正由Cartwright和Ray（1991）提出，Ray等。 （1994）和Ma等。 （1994）。首先，通过将由日和半日组成部分组成的潮汐变化与Chichijima的潮汐仪数据进行比较，来评估新潮汐模型的性能。雷等人提出的潮汐模型。给出最小的均方根（rms）差2.61 cm。通过频谱分析评估每个潮汐模型中幅度和相位的误差。将潮汐模型校正后的TOPEX SSH与Chichijima的海平面数据进行比较。在SSHs和Chichijima海平面之间的残差中发现了大约1年的长期变化。从岛屿周围的水文数据计算得出的动态高度异常与Chichijima海平面之间的差异中也发现了这种变化。通过减去长期变化，TOPEX SSH和Chichijima海平面之间的均方根差减小到约4 cm，回归线的斜率提高到1。残差显示出与由于高度计观测的重复周期导致的海潮校正不完全而引起的混叠有关的变化。

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  • 来源
    《Journal of oceanography》 |1996年第3期|p.259-273|共15页
  • 作者

    Naoto Ebuchi; Kimio Hanawa;

  • 作者单位

    Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University, Aoba, Sendai 980-77, Japan;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋学;
  • 关键词

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