Showing papers in "Ocean Modelling in 2018"

TL;DR: In this article, a new surface-atmospheric dataset for driving ocean-sea-ice models based on Japanese 55-year atmospheric reanalysis (JRA-55), referred to here as JRA55-do, is presented.

TL;DR: Lagrangian analysis is a powerful way to analyse the output of ocean circulation models and other ocean velocity data such as from altimetry as mentioned in this paper, where large sets of virtual particles are integrated within the 3D, time-evolving velocity fields.

TL;DR: In this paper, simulations of the global ocean wave climate corresponding to the surface winds and sea ice concentrations as simulated by five CMIP5 (Coupled Model Intercomparison Project Phase 5) climate models for the historical (1979-2005) and RCP8.5 scenario future (2081-2100) periods were presented.

TL;DR: The state of the art of the numerics of hydrodynamic non-hydrostatic structured-grid coastal ocean models is reviewed in this paper, with a focus on the specific requirements for local ocean models.

TL;DR: The stability of the Atlantic meridional overturning circulation (AMOC) in ocean models depends quite strongly on the model formulation, especially the vertical mixing, and whether it is coupled to an atmosphere model as discussed by the authors.

TL;DR: In this article, the authors calibrate the wind to wave growth parameter within the spectral wave model WAVEWATCH III for 10 reanalysis datasets and 2 datasets composed of merged satellite observations.

TL;DR: In this article, a 3D phase-averaged modeling system using a vortex force formalism is applied to hindcast an unpublished field experiment, carried out at a dissipative beach under moderate to very energetic wave conditions (H m 0 = 6 m at breaking and T p = 22 s ).

TL;DR: In this paper, the authors extend the 3D unstructured-grid model for the Upper Chesapeake Bay to cover the entire bay and its adjacent shelf, and assess its skill in simulating saltwater intrusion and the coastal plume.

TL;DR: In this paper, the authors assess the impact of the Southern Annular Mode (SAM) on global ocean wind waves using 30 years of wave data from a wave model hindcast that is forced with high resolution surface winds from the NCEP-CFSR reanalysis, and apply their analysis to each of the four temperate zone seasons comprising March-May (MAM), June-August (JJA), September-November (SON), and December-February (DJF).

TL;DR: In this article, a set of wave hindcasts is constructed using two different types of wind calibration, followed by an additional test retuning the input source term Sin in the wave model.

TL;DR: In this paper, the sensitivity of Antarctic sea-ice to increasing glacial freshwater release into the Southern Ocean is studied in a series of 31-year ocean/sea-ice/iceberg model simulations.

TL;DR: In this article, the authors proposed a method to parameterize vertical turbulent mixing coefficients within the ocean surface boundary layer (OSBL) for climate applications, by combining an existing resolved shear-driven mixing parameterization with a new method to avoid time step sensitivity.

TL;DR: In this paper, wave breaking closure for Boussinesq type models is considered, and two closure strategies are considered: an eddy viscosity approach and suppressing the dispersive terms in breaking regions.

TL;DR: In this paper, the authors integrated satellite ocean-colour observations with a coupled physical-biogeochemical model in order to improve the spatiotemporal descriptions of chlorophyll and other biogeochemical variables in the Mediterranean shelf seas.

TL;DR: In this paper, a wave-current coupled model was calibrated and validated against observational data, and then applied to investigate the complex dynamics in the Maryland Coastal Bays during Hurricane Irene (2011).

TL;DR: In this paper, a fully coupled atmosphere-ocean-wave model was applied to study the upper ocean response of the South China Sea (SCS) to Typhoon Kalmaegi, which showed some typhoon-induced rightward intensifications in sea surface cooling, current speed, and significant wave height.

TL;DR: In this paper, the authors propose and test a dynamic consistent parameterization for representing mesoscale eddy effects in non-eddy-resolving and eddy-permitting ocean circulation models and focus on the classical double-gyre problem, in which the main dynamic eddy effect maintains eastward jet extension of the western boundary currents and its adjacent recirculation zones via eddy backscatter mechanism.

TL;DR: In this paper, an approach to quantifying the numerical diapycnal mixing in GO5.0 is described, based on the isopycnal watermass analysis of Lee et al. They show that the effective mixing in this model configuration is up to an order of magnitude higher than the explicit mixing in much of the ocean interior, implying that mixing in the model below the mixed layer is largely dominated by numerical mixing.

TL;DR: In this paper, a series of twin experiments in an idealized ocean channel that experiences wind-driven upwelling was conducted, where the forecast model was forced with biased wind stress and perturbed biogeochemical model parameters compared to the model run representing the truth.

TL;DR: In this paper, the authors identify Lagrangian coherent vortices in a global mesoscale eddy-permitting ocean model using the rotation-based method of Haller et al.

TL;DR: In this paper, the authors compare three model runs, two with constant drag coefficients and one with variable drag coefficients varying as a function of sea-ice characteristics, and illustrate the interplay of ice deformation and ice concentration in different seasons and regions.

TL;DR: In this article, the properties of wind-driven baroclinic turbulence are investigated using eddy-resolving process simulations, focusing on the case of retrograde winds that arises around the margins of the subtropical gyres.

TL;DR: In this article, the first use of altimeter and in situ profile observations to improve the initialisation of an operational shelf-seas forecasting system is described, which is a 7 km horizontal resolution ocean model covering the European North-West Shelf (NWS) seas.

TL;DR: In this article, coupled ocean-atmosphere-wave-and-sediment transport (COAWST) was employed to explore sediment dynamics in the northern Gulf of Mexico during hurricane Gustav in 2008.

TL;DR: In this article, the authors used the Regional Ocean Modeling System (ROMS) with 4-dimensional variational (4D-Var) data assimilation configured to obtain climatological annual and monthly mean results.

TL;DR: In this article, the authors compare two approaches: a high-resolution grid nested into a global model at coarser resolution (NEMO with AGRIF) and an unstructured-mesh grid (FESOM) which allows to variably enhance resolution where desired.

TL;DR: In this paper, the authors evaluated the performance of five shock-capturing-type reconstruction schemes in modeling shallow water waves implemented in the public-domain Boussinesq model, FUNWAVE-TVD.

TL;DR: In this article, a 9.6 million node large-scale unstructured grid finite-element forward barotropic model is developed and applied to understand the tidal dynamics and dissipation mechanisms of the Indian and western Pacific Oceans down to sub-kilometer scale at the coast.

TL;DR: In this article, a 3D baroclinic discontinuous Galerkin finite element model SLIM 3D is used to simulate the Columbia River (CR) estuary and plume dynamics.

TL;DR: In this paper, an unstructured grid hydrodynamic model SUNTANS is applied to investigate the internal wave dynamics around Scott Reef, Western Australia, an isolated coral reef atoll located on the edge of the continental shelf in water depths of 500,m and more.