A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea

doi:10.3390/rs12132157

IOCAS-IR

	A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea
	Hu DH(胡登辉); Xu YS(徐永生)
	2020
发表期刊	Remote Sensing
卷号	12 期号:13 页码:2157
摘要	With the development of satellite observation technology, higher resolution and shorter return cycle have also placed higher demands on satellite data processing. The non-tide high-frequency barotropic oscillation in the marginal sea produces large aliasing errors in satellite altimeter observations. In previous studies, the satellite altimeter aliasing correction generally relied on a few bottom pressure data or the model data. Here, we employed the high-frequency tide gauge data to extract the altimeter non-tide aliasing correction in the west Mediterranean Sea. The spatial average method and EOF analysis method were adopted to track the high-frequency oscillation signals from 15 tide gauge records (TGs), and then were used to correct the aliasing errors in the Jason-1 and Envisat observations. The results showed that the EOF analysis method is better than the spatial average method in the altimeter data correction. After EOF correction, 90% of correlation (COR) between TG and sea level of Jason-1 has increased ~5%, and ~3% increase for the Envisat sea level; for the spatial average correction method, only ~70% of Jason-1 and Envisat data at the TGs location has about 2% increase in correlation. The EOF correction reduced the average percentage of error variance (PEL) by ~30%, while the spatial average correction increased the average percentage of PEL by ~20%. After correction by the EOF method, the altimeter observations are more consistent with the distribution of strong currents and eddies in the west Mediterranean Sea. The results prove that the proposed EOF method is more effective and accurate for the non-tide aliasing correction.
关键词	tide gauge EOF analysis de-aliasing altimeter
DOI	10.3390/rs12132157
收录类别	SCI
语种	英语
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.qdio.ac.cn/handle/337002/169762
专题	中国科学院海洋研究所海洋环流与波动重点实验室
通讯作者	Xu YS(徐永生)
作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Hu DH,Xu YS. A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea[J]. Remote Sensing,2020,12(13):2157.
APA	Hu DH,&Xu YS.(2020).A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea.Remote Sensing,12(13),2157.
MLA	Hu DH,et al."A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea".Remote Sensing 12.13(2020):2157.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
remotesensing-12-021（12752KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览