Comparison of surface velocities determined from altimeter and drifting buoy data
Comparison of surface velocities determined from altimeter and drifting buoy data
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根据高度计和漂流浮标数据确定的表面速度的比较
DOI：
10.1007/bf02235462
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发表时间：
1995
影响因子：
2.3
通讯作者：
H. Ishii
中科院分区：
文献类型：
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作者：
K. Ichikawa;S. Imawaki;H. Ishii
本文将1987年3月至11月由一个漂流浮标轨迹测定的海面速度与借助长期水文观测资料从高程资料得到的海面动力地形（SSDT）测定的海面地转速度进行比较。总的来说，这些速度在纬向分量和经向分量上都表现出相似的时间变化，除了在高度SSDT场中发现明显误差的时期。当浮标被几个大洋中部的中尺度涡流困住时，对比效果特别好。然而，当浮标位于黑潮地区时，由于同时使用了时间和空间平滑的水文资料平均SSDT，发现了系统的差异；相反，由参考改进大地水准面模型的测高SSDT确定的地表地转速度具有更好的对比效果。
Surface velocities determined from trajectory of a drifting buoy from March through November 1987 are compared with surface geostrophic velocities determined from sea surface dynamic topography (SSDT) obtained from altimetry data with the aid of long-term hydrographic observation data. In general, these velocities show similar temporal variations in both zonal and meridional components, except in a period when obvious error is found in the altimetric SSDT field. When the buoy was trapped by several mid-ocean meso-scale eddies, the comparison is especially good. Systematic discrepancy is found, however, when the buoy was in the Kuroshio region, because of using both temporally and spatially smoothed mean SSDT estimated from hydrographic data; instead, surface geostrophic velocities determined from the altimetric SSDT referred to the improved geoid model result in better comparison.
S. Imawaki：“通过最佳插值从卫星测高数据绘制平均海面高程场”J. Geophys。
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