Comparison of sea surface dynamic heights estimated from inverted echo sounder data and satellite altimeter data

Koji Kakinoki, S. Imawaki, K. Ichikawa, Shinji Umatani
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引用次数: 1

Abstract

Sea surface dynamic height (SSDH) anomalies estimated from long-time inverted echo sounder (IES) data using gravest empirical mode method are compared with satellite altimeter data. The IES-derived SSDH anomalies agree well with the altimetric SSDH anomalies, although the IES-derived SSDH variation is slightly underestimated. We calculate power spectra of these SSDH anomalies to discuss time-scale dependency of their differences. The differences between two SSDH anomalies are found mainly caused by components with the periods from 50 days to 100 days, which correspond to meso-scale eddies or small meanders of the Kuroshio. These differences result in smaller variation of the IES-derived SSDH.
反演回波测深数据与卫星高度计数据估算的海面动力高度的比较
利用最严重经验模态方法估算了长时间倒立回声测深资料的海面动力高度异常,并与卫星高度计资料进行了比较。ies衍生的SSDH异常与测高SSDH异常吻合较好,尽管ies衍生的SSDH变化略被低估。我们计算了这些SSDH异常的功率谱,讨论了它们差异的时间尺度依赖性。两种异常的差异主要是由周期在50 ~ 100天的分量引起的,这些分量对应于黑潮的中尺度涡旋或小曲流。这些差异导致ies衍生的SSDH变化较小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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