Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/51373
Título: Decadal analysis of hydrography and in situ nutrient budgets in the western and eastern North Atlantic subtropical gyre
Autores/as: Cianca, Andrés
Helmke, Peer
Mouriño, Beatriz
Rueda, María José 
Llinás Gonzalez, Octavio 
Neuer, Susanne
Clasificación UNESCO: 2510 Oceanografía
Fecha de publicación: 2007
Publicación seriada: Journal of geophysical research. Oceans 
Resumen: The current debate about the mechanisms and magnitude of new nutrient input to the euphotic zone in subtropical gyres calls for studies which consider large and mesoscale perspectives by combining in situ time series and remote observations. We carried out a first of its kind comparative analysis of hydrography and sea level anomaly (SLA) at the oligotrophic time series stations BATS (Bermuda Atlantic Time Series Study) and ESTOC (European Station for Time Series, Canary Islands) using concomitant 10‐yr in situ and satellite altimetry data. The stations are located at about the same latitude in the western and eastern boundaries of the subtropical North Atlantic gyre, respectively, and provide the opportunity to study differences that may exist between both regions. Observed SLA was 0.25 m at BATS, compared with 0.12 m at ESTOC, a consequence of the higher eddy kinetic energy in the western compared with the eastern subtropical gyre. We quantified a detailed in situ nutrient budget for both time series stations; ESTOC received about 75% of the nutrients available for new production at BATS (in average 0.28 mol N m−2 yr−1 compared with 0.38 mol N m−2 yr−1, respectively), but the difference was not significant. However, significant differences in input mechanisms existed between both stations; eddy pumping constituted the main new nutrient source BATS, whereas wintertime convection was the main nutrient supply mechanism at ESTOC. In addition, the nutricline was significantly shallower at ESTOC compared with BATS, partly compensating for shallower mixed‐layer depths and SLA variability at the western station. We found considerable interannual variability in both eddy pumping and wintertime convection which may be related to NAO‐induced changes in the pattern of the subtropical gyre.
URI: http://hdl.handle.net/10553/51373
ISSN: 2169-9291
DOI: 10.1029/2006JC003788
Fuente: Journal of Geophysical Research: Oceans [ISSN 2169-9291], v. 112 (C07025)
Colección:Artículos
miniatura
Adobe PDF (1,57 MB)
Vista completa

Google ScholarTM

Verifica

Altmetric


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.