Transport Properties in the Adriatic Sea as Deduced from Drifter Data

Falco, Pierpaolo; Griffa, Annalisa; Poulain, Pierre-Marie; Zambianchi, Enrico

doi:10.1175/1520-0485(2000)030<2055:tpitas>2.0.co;2

Cited by 103 publications

(121 citation statements)

References 28 publications

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“…The Lagrangian time scale T L is approximately one day for the ADELIE drifters and slightly longer for the historical drifters. This value is comparable to other drifter studies in coastal and topographically influenced regions such as the Adriatic Sea (Falco et al 2000) and the Aegean Sea (Olson et al 2007). The Lagrangian scales are summarized in Table 3.…”

Section: A Basic Flow Statisticssupporting

confidence: 88%

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Surface Circulation at the Tip of the Antarctic Peninsula from Drifters

Thompson

Heywood

Thorpe

et al. 2009

Journal of Physical Oceanography

114

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An array of 40 surface drifters, drogued at 15-m depth, was deployed in February 2007 to the east of the tip of the Antarctic Peninsula as part of the Antarctic Drifter Experiment: Links to Isobaths and Ecosystems (ADELIE) project. Data obtained from these drifters and from a select number of local historical drifters provide the most detailed observations to date of the surface circulation in the northwestern Weddell Sea. The Antarctic Slope Front (ASF), characterized by a ∼20 cm s−1 current following the 1000-m isobath, is the dominant feature east of the peninsula. The slope front bifurcates when it encounters the South Scotia Ridge with the drifters following one of three paths. Drifters (i) are carried westward into Bransfield Strait; (ii) follow the 1000-m isobath to the east along the southern edge of the South Scotia Ridge; or (iii) become entrained in a large-standing eddy over the South Scotia Ridge. Drifters are strongly steered by contours of f /h (Coriolis frequency/depth) as shown by calculations of the first two moments of displacement in both geographic coordinates and coordinates locally aligned with contours of f /h. An eddy-mean decomposition of the drifter velocities indicates that shear in the mean flow makes the dominant contribution to dispersion in the along-f /h direction, but eddy processes are more important in dispersing particles across contours of f /h. The results of the ADELIE study suggest that the circulation near the tip of the Antarctic Peninsula may influence ecosystem dynamics in the Southern Ocean through Antarctic krill transport and the export of nutrients.

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Section: A Basic Flow Statisticssupporting

confidence: 88%

“…where R(t) is the Lagrangian autocovariance of the eddy velocity (Bauer et al 1998;Falco et al 2000). The Lagrangian time scale T L is then obtained by dividing k by the variance of the eddy velocity s 2 , or…”

Section: A Basic Flow Statisticsmentioning

confidence: 99%

Surface Circulation at the Tip of the Antarctic Peninsula from Drifters

Thompson

Heywood

Thorpe

et al. 2009

Journal of Physical Oceanography

114

126

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“…la. The reader is referred to Poulain (1999Poulain ( , 2001, Cushman-Roisin et al (2001, Falco et al (2000), Maurizi et al (2004) and Martin et al (2006) for a comprehensive discussion of the circulation features and data sets. The main point is that the NCOM simulation employed here adequately approximates the main features of the upper circulation in the Adriatic Sea.…”

Section: Coastal Model and Configurationmentioning

confidence: 99%

“…The anisotropy of dispersion is well known in the Adriatic Sea (Falco et al, 2000;Lacorata et al, 2001). As such, the relative dispersion is calculated in the zonal and meridional directions separately.…”

Section: Dispersion From the Un Filtered Velocity Fieldmentioning

confidence: 99%

Relative dispersion from a high-resolution coastal model of the Adriatic Sea

et al. 2008

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“…Lagrangian stochastic models are often used in conjunction with OGCM velocity outputs to simulate transport of pollutants or of biological quantities that can be considered approximately as passive tracers (Cowen et al 2000(Cowen et al , 2003. Very simple first-order, one-dimensional LSMs VOLUME 34 J O U R N A L O F P H Y S I C A L O C E A N O G R A P H Y with constant parameters are often used (e.g., Dutkiewicz et al 1993;Falco et al 2000). The present results indicate that the use of two-dimensional models with distributed spin is more appropriate in presence of coherent structures and it provides information on parameter distribution in the subsurface North Atlantic.…”

Section: Summary and Concluding Remarksmentioning

confidence: 99%

Oceanic Turbulence and Stochastic Models from Subsurface Lagrangian Data for the Northwest Atlantic Ocean

et al. 2004

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The historical dataset provided by 700-m acoustically tracked floats is analyzed in different regions of the northwestern Atlantic Ocean. The goal is to characterize the main properties of the mesoscale turbulence and to explore Lagrangian stochastic models capable of describing them. The data analysis is carried out mostly in terms of Lagrangian velocity autocovariance and cross-covariance functions. In the Gulf Stream recirculation and extension regions, the autocovariances and cross covariances exhibit significant oscillatory patterns on time scales comparable to the Lagrangian decorrelation time scale. They are indicative of sub-and superdiffusive behaviors in the mean spreading of water particles. The main result of the paper is that the properties of Lagrangian data can be considered as a superposition of two different regimes associated with looping and nonlooping trajectories and that both regimes can be parameterized using a simple first-order Lagrangian stochastic model with spin parameter ⍀. The spin couples the zonal and meridional velocity components, reproducing the effects of rotating coherent structures such as vortices and mesoscale eddies. It is considered as a random parameter whose probability distribution is approximately bimodal, reflecting the distribution of loopers (finite ⍀) and nonloopers (zero ⍀). This simple model is found to be very effective in reproducing the statistical properties of the data.

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Transport Properties in the Adriatic Sea as Deduced from Drifter Data

Cited by 103 publications

References 28 publications

Surface Circulation at the Tip of the Antarctic Peninsula from Drifters

Surface Circulation at the Tip of the Antarctic Peninsula from Drifters

Relative dispersion from a high-resolution coastal model of the Adriatic Sea

Oceanic Turbulence and Stochastic Models from Subsurface Lagrangian Data for the Northwest Atlantic Ocean

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