Short-range forecast of hydrophysical fields in the eastern part of the Black Sea

Kordzadze, A. A.; Demetrashvili, Demuri

doi:10.1134/s0001433813060091

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…In our previous works [13][14][15], some features of regional circulation processes in 2010-2013 and 2017-2019 were numerically studied for the Georgian sector of the Black Sea.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Variability of Hydrological Regime for the Southeastern Part of the Black Sea (2010-2021)

Demetrashvili,

Kukhalashvili,

Kvaratskhelia

2023

GGS

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The study and forecast of mesoscale dynamic processes in the coastal/shelf zones of seas and oceans is one of the main issues of physical oceanography, because these zones experience the most significant anthropogenic load. Circulation processes, which are closely related to temperature and salinity fields, make a significant contribution to the distribution of various impurities of anthropogenic and natural origin in the marine environment. In the present paper, a high-resolution numerical regional model of the Black Sea dynamics of M. Nodia Institute of Geophysics of Ivane Javakhishvili Tbilisi State University (RM-IG) is used to simulate and study some peculiarities of regional hydrophysical processes occurring in 2010-2021 in the southeastern part of the Black Sea covering Georgian sector of the Black Sea and surrounding water area. The RM-IG is based on a primitive system of ocean hydro and thermodynamics equations in hydrostatic approximation written in the Cartesian coordinate system and is implemented with a spatial resolution of 1 km under real atmospheric forcing.

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“…In our previous works [13][14][15], some features of regional circulation processes in 2010-2013 and 2017-2019 were numerically studied for the Georgian sector of the Black Sea.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Variability of Hydrological Regime for the Southeastern Part of the Black Sea (2010-2021)

Demetrashvili,

Kukhalashvili,

Kvaratskhelia

2023

GGS

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“…A number of circulation models that differ in their spatial resolution and methods for describing hydrodynamic processes, including the parameterization of vertical turbulent fluxes of heat, momentum, and salt, were developed for the Black Sea. In addition to the models used in the abovementioned reanalyses, we should mention the numerical experiments described in other works aimed at simulating the dynamics of the entire basin of the Black and Azov Seas and its separate regions, including the ones with the measurement data assimilation [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Vertical Turbulent Exchange Parameterization on the Results of Reanalysis of the Black Sea Hydrophysical Fields

Sukhikh¹,

Dorofeyev²

2018

PhO

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Comparative analysis of two simulations of the Black Sea hydrophysical fields' long-term variability in 1993-2012 is performed. Two reanalyses are done using various methods of parametrizing the vertical turbulent exchange in the circulation model. The first variant implies a simple parameterization including the constant coefficient of vertical turbulent viscosity and the coefficient of vertical turbulent diffusion in a form of climatic profiles. The second simulation includes the turbulence model of the Mellor-Yamada type to parametrize the vertical exchange processes. Having been compared, the reanalysis results and the measurement data show that application of the turbulent model for parametrizing the vertical exchange yields a better description of the Black Sea water thermohaline structure. In particular, structure of the summer seasonal thermocline and location of the main halocline (in both of them maximum deviations of the model temperature and salinity from the in-situ measurement data are observed) are reproduced more accurately. Different methods of parametrizing the momentum vertical exchange influence the horizontal circulation vertical structure.The first variant of simulation shows that a significant part of the currents' kinetic energy is concentrated in the thin 10-m layer, and this fact affects the circulation features of shallow water on the northwestern shelf; whereas the simulation based on the turbulent model implies more intensive transfer of the kinetic energy to the lower layers. The carried out investigation shows that the results of the hydrophysical fields' reanalysis depend on accurate description of the thermodynamic processes in the sea upper layer and the vertical turbulent exchange ones, in particular.Acknowledgements: the investigation is carried out within the framework of the state task on the theme No. 0827-2018-0002 "Development of the methods of operational oceanology based on the inter-disciplinary studies of the marine environment formation and evolution processes, and mathematical modeling using the data of remote and direct measurements" (code "Operational oceanology") (numerical modeling with satellite data assimilation) under support of the RSF No.17-77-30001 "New methods and supercomputer technologies of the World Ocean and Arctic basin nowcast and forecast" (analysis of the obtained results).For citation: Sukhikh, L.I. and Dorofeyev, V.L., 2018. Influence of the vertical turbulent exchange parameterization on the results of reanalysis

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Simulating large-scale circulation in seas and oceans

Zalesny

Ivchenko

2015

Izv. Atmos. Ocean. Phys.

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The problem of simulating ocean general circulation is considered using an approach developed by G.I. Marchuk. Most attention is focused on problems associated with the application of multi compo nent splitting and adjoint equation methods and with the parameterization of turbulent exchange processes. The statement of the problem, an algorithm of its solution, and the results of the four dimensional tempera ture and salinity data assimilation in a model of World Ocean hydrodynamics are discussed. This algorithm yields qualitatively reliable results, and its main features are modularity, usability, and the possibility of using efficient implicit schemes.

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Short-range forecast of hydrophysical fields in the eastern part of the Black Sea

Cited by 7 publications

References 5 publications

Numerical Study of Variability of Hydrological Regime for the Southeastern Part of the Black Sea (2010-2021)

Numerical Study of Variability of Hydrological Regime for the Southeastern Part of the Black Sea (2010-2021)

Influence of the Vertical Turbulent Exchange Parameterization on the Results of Reanalysis of the Black Sea Hydrophysical Fields

Simulating large-scale circulation in seas and oceans

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