What does cause the collapse of the Western Alboran Gyre? Results of an operational ocean model

Garrido, José Carlos Sánchez; García‐Lafuente, Jesús; Fanjul, Enrique Álvarez; Sotillo, Marcos García; Santos, Francisco J. de los

doi:10.1016/j.pocean.2013.07.002

Cited by 56 publications

(77 citation statements)

References 26 publications

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“…The scales of variability affecting the interchange at the Strait of Gibraltar (and, hence, the AJ dynamics) are wide and go from tidal (e.g., Bruno et al 2002;García-Lafuente et al 1998;Macías et al 2006;Sánchez-Garrido et al 2013;Sannino et al 2002Sannino et al , 2004 to subinertial (Macías et al 2007b;Vázquez et al 2008;Ramírez-Romero et al 2013), seasonal (Garret et al 1990), and interannual (Peliz et al 2013) time scales.…”

Section: Introductionmentioning

confidence: 99%

“…Models have been used to study the hydrodynamic characteristics of the water interchange through the strait (e.g., Izquierdo et al 2001;Sannino et al 2002Sannino et al , 2004Sannino et al , 2007 and to assess the tidal influence on the biogeochemical conditions of the Atlantic inflow (Macías et al 2007a) and on the position and behavior of the AJ in the NW Alboran Sea (Sánchez-Garrido et al 2013). Interannual analysis of the baroclinic flows at the strait and of their relationship with observed atmospheric conditions have also been recently performed using numerical models by Peliz et al (2013) and by Boutov et al (2014).…”

Section: Introductionmentioning

confidence: 99%

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The seasonal cycle of the Atlantic Jet dynamics in the Alboran Sea: direct atmospheric forcing versus Mediterranean thermohaline circulation

2016

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The Atlantic Jet (AJ) is the inflow of Atlantic surface waters into the Mediterranean Sea. This geostrophically adjusted jet fluctuates in a wide range of temporal scales from tidal to subinertial, seasonal, and interannual modifying its velocity and direction within the Alboran Sea. At seasonal scale, a clearly defined cycle has been previously described, with the jet being stronger and flowing towards the northeast during the first half of the year and weakening and flowing more southwardly towards the end of the year. Different hypothesis have been proposed to explain this fluctuation pattern but, up to now, no quantitative assessment of the importance of the different forcings for this seasonality has been provided. Here, we use a 3D hydrodynamic model of the entire Mediterranean Sea forced at the surface with realistic atmospheric conditions to study and quantify the importance of the different meteorological forcings on the velocity and direction of the AJ at seasonal time scale. We find that the direct effects of local zonal wind variations are much more important to explain extreme collapse events when the jet dramatically veers southward than to the seasonal cycle itself while sea level pressure variations over the Mediterranean seem to have very little direct effect on the AJ behavior at monthly and longer time scales. Further model results indicate that the annual cycle of the thermohaline circulation is the main driver of the seasonality of the AJ dynamics in the model simulations.The annual cycles in local wind forcing and SLP variations over the Mediterranean have no causal relationship with the AJ seasonality.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The seasonal cycle of the Atlantic Jet dynamics in the Alboran Sea: direct atmospheric forcing versus Mediterranean thermohaline circulation

2016

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“…The specific configuration is similar to that of Sánchez-Garrido et al (2013), with resolution increased roughly by a factor of three in the Alboran. …”

Section: Model Setupmentioning

confidence: 63%

Chaotic advection, mixing, and property exchange in three-dimensional ocean eddies and gyres

Brett¹

2018

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“…Apart from being a very useful data source to measure the surface circulation, the MEDESS-GIB was designed to be an observational reference for the validation of the existing basin scale operational met-ocean and oil-spill models, i.e., the MyOcean IBI-MFC (Sotillo et al, 2015) and localscale systems, i.e., the Puertos del Estado SAMPA highresolution ocean forecast products (Sánchez-Garrido et al, 2013). These operational products are used by the MEDESS-4MS multi-model oil spill forecasting service as part of its met-ocean forcing data catalog.…”

Section: The Medess-gib Sg: Objectives and Designmentioning

confidence: 99%

“…3 from Sánchez-Garrido et al, 2013). Further east, the Almeria-Oran front separates two water masses (the recent fresh Atlantic water and the saltier Mediterranean water), impinging on the African coast and leading the flow of recent Atlantic waters to progress eastwards, establishing the so-called Algerian Current, which flows eastwards mainly along the African coast.…”

Section: Overview Of the Medess-gib Drifter Buoy Trajectories And Sstmentioning

confidence: 99%

The MEDESS-GIB database: tracking the Atlantic water inflow

Sotillo

Garcı́a-Ladona²,

Orfila

et al. 2016

Earth Syst. Sci. Data

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Abstract. On 9 September 2014, an intensive drifter deployment was carried out in the Strait of Gibraltar. In the frame of the MEDESS-4MS Project (EU MED Program), the MEDESS-GIB experiment consisted of the deployment of 35 satellite tracked drifters, mostly of CODE-type, equipped with temperature sensor sampling at a rate of 30 min. Drifters were distributed along and on both sides of the Strait of Gibraltar. The MEDESS-GIB deployment plan was designed as to ensure quasi-synoptic spatial coverage. To this end, four boats covering an area of about 680 NM 2 in 6 h were coordinated. As far as these authors know, this experiment is the most important exercise in the area in terms of number of drifters released. Collected satellite-tracked data along drifter trajectories have been quality controlled and processed to build the presented MEDESS-GIB database. This paper reports the MEDESS-GIB data set that comprises drifter trajectories, derived surface currents and in situ SST measurements collected along the buoys tracks. This series of data is available through the PANGAEA (Data Publisher for Earth and Environmental Science) repository, with the following

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What does cause the collapse of the Western Alboran Gyre? Results of an operational ocean model

Cited by 56 publications

References 26 publications

The seasonal cycle of the Atlantic Jet dynamics in the Alboran Sea: direct atmospheric forcing versus Mediterranean thermohaline circulation

The seasonal cycle of the Atlantic Jet dynamics in the Alboran Sea: direct atmospheric forcing versus Mediterranean thermohaline circulation

Chaotic advection, mixing, and property exchange in three-dimensional ocean eddies and gyres

The MEDESS-GIB database: tracking the Atlantic water inflow

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