A5000824207- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Marine and coastal ecosystems
- Geophysics and Gravity Measurements
- Climate variability and models
- Coastal and Marine Dynamics
- Meteorological Phenomena and Simulations
- Marine Biology and Ecology Research
- Ecosystem dynamics and resilience
- Solar and Space Plasma Dynamics
- Ocean Acidification Effects and Responses
- Geochemistry and Geologic Mapping
- Advanced Computational Techniques and Applications
- Underwater Acoustics Research
- Marine Bivalve and Aquaculture Studies
- Aquatic and Environmental Studies
- Business Process Modeling and Analysis
- Service-Oriented Architecture and Web Services
- Methane Hydrates and Related Phenomena
- Geomagnetism and Paleomagnetism Studies
- Simulation Techniques and Applications
- Coastal wetland ecosystem dynamics
- Marine animal studies overview
- Reservoir Engineering and Simulation Methods
National Research Council
2018-2024
Istituto di Scienze Marine del Consiglio Nazionale delle Ricerche
2015-2024
CMCC Foundation - Euro-Mediterranean Center on Climate Change
2013-2014
Central Maine Community College
2013
University College Dublin
2009
University of St Andrews
2003-2008
Mathematical Institute of the Slovak Academy of Sciences
2006
The Mar Menor lagoon has been subjected to high anthropogenic pressures. Among them, in the early 1970s, dredging and enlargement of one inlets make a navigable channel had strong consequences on hydrology, ecology, fisheries lagoon. In recent years, changes agricultural practices have induced an eutrophication process, leading loss water quality. As solution, some management proposals included order increase renewal. However, these did not take into account negative effects previous...
Understanding the water circulation in oceans and coastal seas is among key topics of oceanographic climate research. Hydrodynamic studies form basis for many subjects, whether sediment transport, morphology, quality, ecological changes are being investigated. modelling has become a fundamental tool describing dynamics marine environments, revealing human impact on sea promoting sustainable development resources. By complementing – through data assimilation more diffuse integrated global...
Abstract. In this work we consider a numerical study of hydrodynamics in the coastal zone using two different models, SHYFEM (shallow water hydrodynamic finite element model) and MITgcm (Massachusetts Institute Technology general circulation model), to assess their capability capture main processes. We focus on north Adriatic Sea during strong dense event that occurred at beginning 2012. This serves as an interesting test case examine both models strengths weaknesses, while giving...
The underwater sound distribution generated by natural sources, shipping and trawling activities has been computed the Quonops© modelling webservice for Northern Adriatic Sea (NAS) during 2020, a year characterized COVID-19 lockdown restrictions. Modelling calibrated using year-long time series of field measurements covering domain interest. Sound levels (50th percentile) ranged between 75 90 dB re 1μPa all considered frequencies (63 Hz, 125 250 Hz third octave bands). Noisier NAS areas...
We present a simple approximate model for studying general aspects of vortex interactions in rotating stably-stratified fluid. The idealizes vortices by ellipsoidal volumes uniform potential vorticity, materially conserved quantity an inviscid, adiabatic Each thus possesses 9 degrees freedom, 3 the centroid and 6 shape orientation. Here, we develop equations time evolution these quantities system interacting vortices. An isolated is well known to remain fluid with constant background...
The study of the motion a fluid ellipsoid has long and fascinating history stretching back originally to Laplace in late 18th century. Recently, this subject been revived context geophysical dynamics, where it shown that an uniform potential vorticity remains background flow consisting horizontal strain, vertical shear, rotation. object present work is simple, appealing, practical way investigating not just dynamics but general. main result may be reduced evolution symmetric, 3×3 matrix,...
It is now well established that two distinct types of motion occur in geophysical turbulence: slow motions associated with potential vorticity advection and fast oscillations due to inertia–gravity waves (or acoustic waves). Many studies have theorized the existence a flow for which entire controlled by one ‘master variable’) – this known as balance. In real flows, deviations from balance form or ‘imbalance’ often been found be small. Here we examine extent holds rotating stratified...
The fluid dynamics of the atmosphere and oceans is to a large extent controlled by slow evolution scalar field called ‘potential vorticity’ (PV), with relatively fast motions such as inertia-gravity waves playing only minor role. This state affairs commonly referred ‘balance’. Potential vorticity special which materially conserved in absence diabatic effects dissipation, that are generally weak oceans. Moreover, balanced flow, PV induces entire motion its thermodynamic structure (Hoskins et...
In this work we study a plankton ecosystem model in turbulent flow. The consider contains logistic growth with spatially varying background carrying capacity and the flow dynamics are generated using two-dimensional (2D) Navier-Stokes equations. We characterize system terms of dimensionless parameter, gamma identical TB/TF, which is ratio biological time scales TB TF. integrate numerically for different values until mean reaches statistically stationary state examine how steady-state...
We review the development of ellipsoidal vortex model within field geophysical fluid dynamics. This is built on classical potential theory ellipsoids and applies to large-scale flows, such as those found in atmosphere oceans, where dynamics are strongly affected by Earth's rotation. In this limit governing equations reduce quasi-geostrophic system, all depends a single scalar field, vorticity, which dynamical marker for vortices. The solution system achieved inversion Poisson equation, that...
We consider the motion of a single quasi-geostrophic ellipsoid uniform potential vorticity in equilibrium with linear background shear flow. This depends on four parameters: height-to-width aspect ratio vortex, ).Overall we find that equilibria are stable over most parameter space considered, and where instability does occur marginal is usually ellipsoidal. From these results, determine values for which vortex stable, conjecture characteristics would be commonly observed turbulent flows.
Abstract. Here we show a simple mechanism in which changes the rate of horizontal stirring by mesoscale ocean eddies can trigger or suppress plankton blooms and lead to an abrupt change average density. We consider single species phytoplankton model with logistic growth, grazing spatially non-uniform carrying capacity. The local dynamics have multiple steady states for some values capacity that localized as fluid moves across regions different properties. this even small ratio biological...
We consider the motion of a single ellipsoidal vortex with uniform potential vorticity in rotating stratified fluid at finite Rossby number $\unicode[STIX]{x1D716}$ . Building on previous solutions obtained under quasi-geostrophic approximation (at first order ), we obtain analytical for balanced part flow $O(\unicode[STIX]{x1D716}^{2})$ These capture important ageostrophic effects giving rise to an asymmetry evolution cyclonic and anticyclonic vortices. Previous work has shown that, if...
Here we study how large-scale variability of oceanic plankton is affected by mesoscale turbulence in a spatially heterogeneous environment. We consider phytoplankton-zooplankton (PZ) ecosystem model, with different types zooplankton grazing functions, coupled to turbulent flow described the two-dimensional Navier-Stokes equations, representing horizontal transport ocean. characterize system using dimensionless parameter, $\ensuremath{\gamma}={T}_{B}/{T}_{F}$, which ratio biological time...
Here we examine the motion of an isolated ellipsoidal vortex in a rotating stratified fluid. We derive analytical solution to set balanced equations at next order quasi-geostrophic theory, providing insights into geophysical vortices finite Rossby number ε. This is achieved through complicated Poisson equations. Though complicated, give rise velocity field that depends linearly on spatial coordinates inside vortex, and, thus preserves form. From this general solution, determine equilibria...
In this paper, we study how cyclonic and anticyclonic vortices adapt their shape orientation to a background shear flow in an effort understand geophysical vortices. Here use balanced model that incorporates the effects of rotation density stratification case isolated vortex uniform potential vorticity subjected mimics effect surrounding We find equilibrium states analyze linear stability determine characteristics at margin stability. Differences are found between equilibria depending on...
This report describes and assesses the computational performance of PELAGOS coupled model, a global ocean coupling NEMO BFM. The first part is dedicated to comparison CMCC architectures on which model running, second offers insight regarding focal points pertaining near long-term optimization possibilities.
We consider a uniform ellipsoid of potential vorticity (PV), where we exploit analytical solutions derived for balanced model at the second order in Rossby number, next to quasi-geostrophic (QG) theory, so-called QG+1 model. this vortex presence an external background shear flow, acting as proxy effect vortices. For QG system depends on four parameters, height-to-width aspect ratio vortex, $h/r$ , well three parameters characterising strain rate, $\gamma$ rotation rate strain, $\beta$ and...