Modeling dense water mass formation and winter circulation in the northern and central Adriatic Sea

Date

1999-04-01

Author

Bergamasco, A
Oguz, T
Malanotte-Rizzoli, P

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

120
views

0
downloads

In this paper, using an eddy resolving primitive equation model, we attempt to provide quantitative answers to some of the still unresolved or poorly understood dynamical issues related to the general circulation of the northern and central Adriatic Sea. The first question we addressed relates to understanding the effects of the major driving mechanisms on the basin circulation. A series of numerical experiments are carried out to examine the circulation produced by various combinations of different forcing mechanisms. Cold air outbreaks (CAO) associated with the northeasterly bora winds, together with uniform surface cooling and freshwater discharge prescribed near the northwestern corner, give a fairly realistic circulation consistent with the observations. This pattern is comprised of an overall cyclonic gyre in the northern basin, with a strong southward flowing jet along the Italian coastline and a broader northward flow along the Croatian coast. The second question addressed is under what conditions convective mixing extends to the bottom of the Jabuka Pit. While the northern shelf is always uniformly mixed to the bottom, the extent of convection within the Pit depends on the overall stratification prior to onset of the CAO event. Strong subsurface stratification between the intermediate and near-bottom layers prevents deep convection. The third question concerns with the role of the rim current along the Italian coast vs the other circulation components in distributing the North Adriatic Dense Water (NADW) within the basin. In general, the strong density front developed across the shelf break north of the Jabuka Pit restricts the replenishment of the Pit deep layers by the NADW, Rather, the NADW is transported southward along the Italian continental slope in the form of a vein of underflow, The final question addressed is how the thermohaline structure of the water column evolves after the ending of the CAO event, and of the related convection process. (C) 1999 Elsevier Science B,V. All rights reserved.

Subject Keywords

Winter circulation, Adriatic Sea, Clod air outbreaks (CAO)

URI

https://hdl.handle.net/11511/66777

Journal

JOURNAL OF MARINE SYSTEMS

DOI

https://doi.org/10.1016/s0924-7963(98)00087-6

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Modeling the influence of hydrodynamic processes on anchovy distribution and connectivity in the black sea Karadeniz'deki hamsi dağılımı ve bölgeler arası bağlantısı üzerine hidrodinamik proseslerin etkisinin modellenmesi Fach Salihoğlu, Bettina Andrea (2014-01-01) Dispersal mechanisms of Black Sea anchovy larvae (Engraulis encrasicolus ponticus) across the Black Sea were studied with an individual based anchovy larvae model embedded in a Lagrangian model using surface currents calculated from daily dynamic height topography maps of altimeter data during a period of three years (2001-2003). Particles representing anchovy eggs were released at different sites during June to August and their movement was tracked over time. Drifters were advected for 36 days, representin...
Simulation of eddy-driven phytoplankton production in the Black Sea Oguz, T; Salihoğlu, Barış (2000-07-15) A three dimensional, three-layer biological model is used to assess impact of eddy-dominated horizontal circulation on the spatial and temporal variations of plankton biomass in the Black Sea. Simulations are shown to exhibit patchy distributions of phytoplankton biomass as inferred from satellite images, and their intensities agree reasonably well with observations. Overall performance of the three layer model points to its potential capability as a practical alternative tool to more complex and computatio...
Comparison of dispersive and non-dispersive numarical long wave models and harbor agitation Özbay, Ali; Yalçıner, Ahmet Cevdet; Department of Civil Engineering (2012) In this study, the evolution of the numerical water wave models with the theoretical background and the governing equations are briefly discussed and a numerical model MIKE21 BW which can be applied to wave problems in nearshore zone is presented. The numerical model is based on the numerical solution of the Boussinesq type equations formulated on time domain. Nonlinearity and frequency dispersion is included in the model. In order to make comparison between the results of nonlinear shallow water equations ...
Modelling the evolution of demand forecasts in a production-distribution system Yücer, Cem Tahsin; Meral, Fatma Sedef; Department of Industrial Engineering (2006) In this thesis, we focus on a forecasting tool, Martingale Model of Forecast Evolution (MMFE), to model the evolution of forecasts in a production-distribution system. Additive form is performed to represent the evolution process. Variance-Covariance (VCV) matrix is defined to express the forecast updates. The selected demand pattern is stationary and it is normally distributed. It follows an Autoregressive Order-1 (AR(1)) model. Two forecasting procedures are selected to compare the MMFE with. These are MA...
Simulations of the Black Sea pelagic ecosystem by 1-D, vertically resolved, physical-biochemical models Oguz, T; Ducklow, HW; Malanotte-Rizzoli, P; Murray, JW (Wiley, 1998-09-01) The present paper summarizes the results of several simulations of the central Black Sea pelagic food web using three different 1-D, physical-biochemical, water column process models. The most simplified, five-compartment version is used to explore the robust biological features of the ecosystem and the role of upper-layer physics on the evolution of the euphotic zone biological processes. The other models, introducing additional biological complexities, show how these biologically structured models become ...

Citation Formats

A. Bergamasco, T. Oguz, and P. Malanotte-Rizzoli, “Modeling dense water mass formation and winter circulation in the northern and central Adriatic Sea,” JOURNAL OF MARINE SYSTEMS, pp. 279–300, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66777.