Life history of an anticyclonic eddy
19 pages, 11 figures, 1 table, supporting information https://doi.org/10.1029/2004JC002526
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American Geophysical Union
2005-03
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dig-icm-es-10261-1336422020-12-10T11:54:33Z Life history of an anticyclonic eddy Sangrà, Pablo Pelegrí, Josep Lluís Hernández Guerra, Alonso Arregui, Igor Martín, J. M. Marrero-Díaz, Ángeles Martínez-Marrero, Antonio Ratsimandresy, A. W. Rodríguez-Santana, Ángel 19 pages, 11 figures, 1 table, supporting information https://doi.org/10.1029/2004JC002526 We use the trajectory of three buoys dragged below the surface mixed layer, together with sea surface temperature imagery, to examine the evolution of an anticyclonic warm-core eddy since its generation by the Canary Islands. Two buoys remain within the eddy during some 100 days, and the third one remains almost 200 days, while drifting southwestward up to 500 km with the mean Canary Current. The eddy merges with several younger anticyclonic and cyclonic eddies, in each occasion, suffering substantial changes. The eddy core, defined as a region with near-solid-body-type rotation and radial convergence, initially occupies the whole eddy. After interacting with another vortex the inner core markedly slows down, although it continues displaying radial convergence and relatively small radial oscillations, and an uncoupled outer ring is formed or enhanced, which revolves even more slowly and displays large radial fluctuations. The vortex extensive life is consistent with its inertially stable character and observations of radial convergence. A very simple model of vortex merging, where cylinders fuse conserving mass and angular momentum, gives fair results. The observations suggest that the eddy changes, as the result of its own slow evolution and sporadic mixing events, from a young stage, where the core retains its vorticity and occupies most of the eddy, through a mature stage, where the eddy has a reduced inner core and a slowly revolving outer ring, to a decay stage, where the vorticity maximum is substantially reduced This work has been supported by the Spanish government through projects FRENTES (AMB95-0731), COCA (REN2000-1471-C02-02MAR), and BREDDIES (REN2001-2650/ANT) and the special action MAR1999-1489-E and by the European Union through projects CANIGO (MAS3-CT96-0060) and OASIS (EVK3-CT-2002-00073-OASIS) Peer Reviewed 2016-06-17T09:17:51Z 2016-06-17T09:17:51Z 2005-03 2016-06-17T09:17:51Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1029/2004JC002526 issn: 0148-0227 e-issn: 2156-2202 Journal of Geophysical Research 110(C3): C03021 (2005) http://hdl.handle.net/10261/133642 10.1029/2004JC002526 Publisher's version https://doi.org/10.1029/2004JC002526 Sí open American Geophysical Union |
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19 pages, 11 figures, 1 table, supporting information https://doi.org/10.1029/2004JC002526 |
| format |
artículo |
| author |
Sangrà, Pablo Pelegrí, Josep Lluís Hernández Guerra, Alonso Arregui, Igor Martín, J. M. Marrero-Díaz, Ángeles Martínez-Marrero, Antonio Ratsimandresy, A. W. Rodríguez-Santana, Ángel |
| spellingShingle |
Sangrà, Pablo Pelegrí, Josep Lluís Hernández Guerra, Alonso Arregui, Igor Martín, J. M. Marrero-Díaz, Ángeles Martínez-Marrero, Antonio Ratsimandresy, A. W. Rodríguez-Santana, Ángel Life history of an anticyclonic eddy |
| author_facet |
Sangrà, Pablo Pelegrí, Josep Lluís Hernández Guerra, Alonso Arregui, Igor Martín, J. M. Marrero-Díaz, Ángeles Martínez-Marrero, Antonio Ratsimandresy, A. W. Rodríguez-Santana, Ángel |
| author_sort |
Sangrà, Pablo |
| title |
Life history of an anticyclonic eddy |
| title_short |
Life history of an anticyclonic eddy |
| title_full |
Life history of an anticyclonic eddy |
| title_fullStr |
Life history of an anticyclonic eddy |
| title_full_unstemmed |
Life history of an anticyclonic eddy |
| title_sort |
life history of an anticyclonic eddy |
| publisher |
American Geophysical Union |
| publishDate |
2005-03 |
| url |
http://hdl.handle.net/10261/133642 |
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