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| Hu, Denghui; Xu, Yongsheng. |
| 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... |
| Tipo: Text |
Palavras-chave: Tide gauge; EOF analysis; De-aliasing; Altimeter. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75262/75467.pdf |
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| Bejaoui, B; Harzallah, A; Moussa, M; Chapelle, Annie; Solidoro, C. |
| This study deals with the use of a multivariate analysis method in order to understand the functioning of the Bizerte lagoon ecosystem. A set of hydrobiological parameters was collected during 10 monthly campaigns in 2004. A variant of the EOF (Empirical Orthogonal Function) technique is used to examine hydrobiological variability modes in this lagoon. The permanent features characterising the lagoon are obtained by applying the EOF technique to data after removing the annual cycle. Two major modes were obtained. The first one shows a contrast between the northern sector of the lagoon, influenced by the Mediterranean Sea, and the southern one influenced by continental waters. This mode is mostly prominent for temperature and salinity. The second mode shows... |
| Tipo: Text |
Palavras-chave: Nutrient cycles; EOF analysis; Bizerte lagoon. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4808.pdf |
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| Blossier, B.; Bryan, K. R.; Daly, C. J.; Winter, C.. |
| A principal component analysis (PCA) is used to decompose data on the coupled morphodynamics of the shoreline and nearshore sandbar of a typical single-barred embayed beach (Tairua Beach, New Zealand). Dynamic patterns are classified into simultaneous modes, where the bar and shoreline move at the same time, and nonsimultaneous modes, where the shore moves independently from the bar, and vice versa. Two simultaneous modes accounting for 65% of the variance of the shoreline and barline dominate the system. One mode describes inverse shoreline and sandbar cross-shore migrations (alongshore averaged), occurring with simultaneous rotations in the same direction. The other mode accounts for migration in the same direction accompanied by variations of the... |
| Tipo: Text |
Palavras-chave: Embayed beach; Nearshore sandbars; Beach rotation; Beach breathing; Coupled behavior; EOF analysis. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00638/75014/75649.pdf |
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