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Título: | Nine years of mass transport data in the eastern boundary of the North Atlantic Subtropical Gyre |
Autor: | Fraile-Nuez, Eugenio ; Machín, Francisco CSIC ORCID; Vélez-Belchí, Pedro CSIC ORCID; López Laatzen, Federico; Borges, Rafael; Benítez Barrios, Verónica CSIC; Hernández Guerra, Alonso | Fecha de publicación: | sep-2010 | Editor: | American Geophysical Union | Citación: | Journal of Geophysical Research: Oceans 115(C9): 9009 (2010) | Resumen: | One of the longest current meter time series in the Lanzarote Passage in the eastern boundary of the North Atlantic Subtropical Gyre has been used to determine and quantify the 9-year mean transport, the inter-annual and seasonal mass transport variability for the three water masses present in the area. Results show North Atlantic Central Water (NACW) flowing southward in the upper levels with a mean mass transport of -0.81 ± 1.48 Sv, Antarctic Intermediate Water (AAIW) flowing northward at intermediate levels with a mean transport of +0.09 ± 0.57 Sv and Mediterranean Water (MW) flowing southward in the deep part of the passage with a mean transport of -0.05 ± 0.17 Sv. Harmonic and wavelet analysis show the presence of a seasonal pattern in the passage for the three water masses. A maximum southward transport in winter and spring has been observed for the NACW followed by a minimum in summer and fall. Near zero values during winter and spring are found for AAIW, with a maximum northward value in summer and a negative value in fall, when this water mass reverses its flow. MW has a similar seasonal pattern to NACW. The vertical structure in the Lanzarote Passage can be approximated by four significant oscillatory modes which cumulatively explain 86.4% of the variance. The strong transport fluctuation found at the seasonal and inter-annual timescales demonstrates that the Eastern Boundary Current transport has a strong impact on meridional overturning estimates, thus indicating that to understand Meridional Overturning Circulation variability, these transport estimates at the eastern Atlantic margin are necessary | Descripción: | 15 pages, 11 figures, 5 tables, supporting information http://onlinelibrary.wiley.com/doi/10.1029/2010JC006161/suppinfo | Versión del editor: | https://doi.org/10.1029/2010JC006161 | URI: | http://hdl.handle.net/10261/79758 | DOI: | 10.1029/2010JC006161 | Identificadores: | doi: 10.1029/2010JC006161 e-issn: 2169-9291 |
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