Diagnostic and prognostic numerical circulation studies of the South Atlantic Bight

Blumberg, Alan F.; Mellor, George L.

doi:10.1029/jc088ic08p04579

Cited by 303 publications

(108 citation statements)

References 24 publications

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“…POM has been extensively described in the literature Mellor, 1983, 1987;Oey et al, 1985a, b;Galperin and Mellor, 1990a, b;Ezer, 1991, Horton et al, 1997;Lascaratos and Nittis, 1998) and is accompanied by a comprehensive user's guide (Mellor, 1998). It has been used previously in numerous coastal applications like the South Atlantic Bight (Blumberg and Mellor, 1983), Delaware Bay (Galperin and Mellor, 1990a, b), the Gulf of Mexico (Mellor and Blumberg, 1985), the Gulf Stream (Ezer and Mellor, 1992), the Mediterranean Sea (Zavatarelli and Mellor, 1995;Horton et al, 1997;Drakopoulos and Lascaratos, 1997), the Adriatic Sea (Zavatarelli and Pinardi, 1995) and the Levantine Sea (Lascaratos and Nittis, 1998), to list some of them. The model has a bottom-following vertical sigma coordinate system, a free surface and a split mode time step.…”

Section: Model Descriptionmentioning

confidence: 99%

A one-way nested eddy resolving model of the Aegean and Levantine basins: implementation and climatological runs

2003

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Abstract. The present study deals with the implementation of an eddy resolving model of the Levantine and Aegean basins and its one-way nesting with a coarse resolution (1/8 • × 1/8 • ) global Mediterranean general circulation model. The modelling effort is done within the framework of the Mediterranean Forecasting System Pilot Project as an initiative towards real-time forecasting within the eastern Mediterranean region.The performed climatological runs of the nested model have shown very promising results on the ability of the model to capture correctly the complex dynamics of the area and at the same time to demonstrate the skill and robustness of the nesting technique applied.A second aim of this study is to prepare a comprehensive climatological surface boundary conditions data set for the Mediterranean Sea. This data set has been developed within the framework of the same research project and is suitable for use in ocean circulation models of the Mediterranean Sea or parts of it. The computation is based on the ECMWF 6-h atmospheric parameters for the period 1979-1993 and a calibrated set of momentum and heat flux bulk formulae resulted from previous studies for the Mediterranean region.

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Section: Model Descriptionmentioning

confidence: 99%

A one-way nested eddy resolving model of the Aegean and Levantine basins: implementation and climatological runs

2003

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“…The model code is based on the three-dimensional, sigma coordinate, free surface, primitive equation Princeton Ocean Model or POM (Blumberg and Mellor, 1983). As this is a widely spread community model, we refrain from a description of the numerics and we refer the reader to the POM home page: http://www.aos.princeton.edu/WWWPUBLIC/htdocs.pom.…”

Section: Model Configurationmentioning

confidence: 99%

High resolution simulations on the North Aegean Sea seasonal circulation

Kourafalou

Barbopoulos

2003

Ann. Geophys.

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Abstract. The seasonal characteristics of the circulation in the North Aegean Sea are examined with the aid of a climatological type simulation (three-year run with perpetual year forcing) on a fine resolution grid (2.5 km by 2.5 km). The model is based on the Princeton Ocean Model with a parameterisation of plume dynamics that is employed for the input of waters with hydrographic properties that are different than the properties of basin waters, as the Black Sea Water (BSW) outflow through the Dardanelles Strait and riverine sources. The model is nested with a sequence of coarser regional and basin-wide models that provide for the long-term interaction between the study area and the Eastern Mediterranean at large. The results are employed to discuss the response of the North Aegean to the important circulation forcing mechanisms in the region, namely wind stress, heat and salt fluxes, buoyancy due to rivers and the BSW outflow (which is low in salinity and occasionally low in temperature) and the interaction with the Southern Aegean. The high resolution allows for the detailed representation of the complicated topography that presides in the region. This helps produce a rich eddy field and it allows for variability in the pathways of BSW that has implications in the basin hydrography and circulation.

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“…It is a free-surface (primitive equation) hydrostatic model. It has been extensively applied to a wide range of oceanic problems including general, estuarine and shelf circulation studies [e.g., Ezer and Mellor, 1992;Mellor et al, 1994;Blumberg and Mellor, 1983;Oey et al, 1985], mesoscale dynamics [Miller and Lee, 1995;Xue and Bane, 1997;Oey, 1998], data assimilation [Mellor and Ezer, 1991], and general and regional studies in the Mediterranean Sea [e.g., Zavatarelli and Mellor, 1995;Lascaratos and Nittis, 1998;Sannino et al, 2002].…”

Section: Governing Equationsmentioning

confidence: 99%

Modeling the baroclinic circulation in the area of the Sicily channel: The role of stratification and energy diagnostics

Napolitano¹,

Sannino²,

Artale³

et al. 2003

J. Geophys. Res.

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[1] Aspects of the circulation of the Sicily channel region are studied with a highresolution, primitive equation, sigma coordinate model. This work is an attempt to study the process governing the purely baroclinic dynamics and its sensitivity to seasonal stratification, thus no atmospheric forcing is used. Two numerical experiments are analyzed using, as initial conditions, diagnostic velocity fields derived from the winter and summer climatological hydrologies. The quasi-steady state is characterized by circulation patterns, in the depth range of the Modified Atlantic Water (MAW) and the Levantine Intermediate Water (LIW), strongly controlled by mesoscale eddies and topography. Seasonal difference is found in the surface current which exhibits the major variability on the African side, downstream of Adventure Bank and the Ionian Slope where the absolute maximum occurs. The intermediate circulation instead does not show relevant seasonal differences. LIW enters through the two passages south of Malta Plateau and preferentially flows along the Sicilian shelf edge exiting over the northern sill. Its pathway is strongly controlled by subsurface cyclonic and anticyclonic cells. The results are in good agreement with observations. An energy diagnostics is applied to model results and sheds important light on dynamical characteristics of the mesoscale eddy field and indicates seasonal differences in the energetic exchange with the mean flow. The analysis of the mean (MKE) and eddy (EKE) kinetic energy, the transfer terms between energy compartments and the eddy momentum flux divergence indicates how eddies are strongly energetic in summer and exchange energy more efficiently with the mean flow. In the quasi-steady state MAW volume transport and MKE and EKE fluctuations are strongly correlated. This result suggests that mesoscale motions can control up to 40% of volume transport variability.INDEX TERMS: 4255 Oceanography: General: Numerical modeling; 4512 Oceanography: Physical: Currents; 4520 Oceanography: Physical: Eddies and mesoscale processes; KEYWORDS: Mediterranean, Sicily Strait, mesoscale, modeling Citation: Napolitano, E., G. Sannino, V. Artale, and S. Marullo, Modeling the baroclinic circulation in the area of the Sicily channel: The role of stratification and energy diagnostics,

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Diagnostic and prognostic numerical circulation studies of the South Atlantic Bight

Cited by 303 publications

References 24 publications

A one-way nested eddy resolving model of the Aegean and Levantine basins: implementation and climatological runs

A one-way nested eddy resolving model of the Aegean and Levantine basins: implementation and climatological runs

High resolution simulations on the North Aegean Sea seasonal circulation

Modeling the baroclinic circulation in the area of the Sicily channel: The role of stratification and energy diagnostics

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