Modeling of Long-Term Evolution of Hydrophysical Fields of the Black Sea

Dorofeyev, V. L.; Sukhikh, L. I.

doi:10.1134/s0001437017060017

Cited by 7 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These errors indicate that the SKIRON data on sea surface T temperature and climatic data on S salinity differ from the ARGO data. The nature of the error profiles in depth corresponds to those presented in [16]: the model in the 50-200 m layer rather strongly underestimates the salinity, and in the 50-100 m layer it overstates the temperature.…”

Section: The Mean and Rms Deviations Of Model T And S From The Valuessupporting

confidence: 58%

“…The implementation of this method consists in adding relaxation terms to the equations for temperature and salinity, representing the difference between the climatic and model values of these characteristics multiplied by the relaxation coefficient, which is equal to the inverse relaxation time of the model to the observations [15]. This method is mainly used for deep layers in the BS models [16]. The method can be considered as a simple assimilation of climate data observations in the ocean models.…”

Section: The Model and Argo Data Descriptionmentioning

confidence: 99%

“…Nudging to climatic values at depths below 150 m is caused by the fact that the BS circulation is characterized by large shallow depths that lead to errors in the approximation of the horizontal components of the pressure gradient in σ-models. Due to the complex topography, such nudging is used in almost all BS models, regardless of the type of the vertical coordinate (see, for example, [16]). For the large BS rivers, including the Danube, Dniester, Dnieper, Rioni, Inguri, Yesilirmak, Kyzylyrmak, Sakarya, real climatic discharge data are set *.…”

Section: The Model and Argo Data Descriptionmentioning

confidence: 99%

See 2 more Smart Citations

Reconstruction of the Black Sea Deep-Water Circulation Using INMOM and Comparison of the Results with the ARGO Buoys Data

Korshenko¹,

Diansky²

2019

PhO

View full text Add to dashboard Cite

Purpose. The present paper is focused on theoretical analysis of hydrophysical characteristics of the Black Sea in 2011. Methods and Results. The Black Sea hydrophysical characteristics are calculated using a version of the marine circulation σ-model (Institute of Numerical Mathematics Ocean Model -INMOM) for the Black, Azov and Marmara seas (BAMS) with high spatial 1 km resolution and 20 σ-levels distributed non-uniformly over the depth. Quality of the simulated salinity and temperature fields is assessed by their comparison with the data of the ARGO deep-profiling floats available for the period under consideration. Degree of correspondence of the modeled current fields to the observed ones is estimated based on the average deep-sea current velocities calculated from the data on the Argo profiling floats' movements. Conclusion. The comparative analysis results show that the INMOM adequately reproduced vertical distribution of the Black Sea hydrophysical characteristics. Comparison of the simulated temperature and salinity fields with those derived from the ARGO buoys data demonstrates the fact that the strongest deviations of the characteristics under study are observed in the sea upper layers (0-100 m); whereas in the deep-water layers (300-1500 m), the degree of consistency between the simulated results and the field data is much more higher. On the depths below 800 meters, the deep-sea anticyclonic flows with the velocities attaining 1.5 cm/s are present. The revealed feature is not typical of the generally accepted scheme of the Black Sea cyclonic circulation.Acknowledgements: the research was carried out within the framework of scientific projects No. 18-05-00353 and No. 18-35-00512 at the RFBR financial support.For citation: Korshenko, E.A., Diansky, N.A. and Fomin,

show abstract

Section: The Mean and Rms Deviations Of Model T And S From The Valuessupporting

confidence: 58%

Section: The Model and Argo Data Descriptionmentioning

confidence: 99%

Section: The Model and Argo Data Descriptionmentioning

confidence: 99%

See 1 more Smart Citation

Reconstruction of the Black Sea Deep-Water Circulation Using INMOM and Comparison of the Results with the ARGO Buoys Data

Korshenko¹,

Diansky²

2019

PhO

View full text Add to dashboard Cite

show abstract

“…For the parameterization of vertical fluxes of momentum, heat and salt, a turbulent model is used. This is a QETE quasi-equilibrium turbulent energy model [15], which is part of the Mellor-Yamada models family [16] and consists of two equations -turbulent energy evolution q 2 /2 and the turbulence scale l. This variant of circulation model was described in detail in [17] and was applied for the modeling of the Black Sea long-term dynamics evolution with no data assimilation.…”

Section: Methodsmentioning

confidence: 99%

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

Sukhikh¹,

Dorofeyev²

2018

PhO

Self Cite

View full text Add to dashboard Cite

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

show abstract

“…В работе [2] реанализ выполнен за период 1993-2012 гг. на основе изложенной в [3] модели с пространственным разрешением 5 × 5 км. В модели усваивались данные спутниковых измерений (температура поверхности моря, аномалии уровня), а также профили температуры и солености на глубинах ниже 200 м, описывающие климатический сезонный ход.…”

Section: Introductionunclassified

Reconstruction of Temperature and Salinity in the Uupper Layer of the Black Sea Using Pseudo-Measurements on the Underlying Horizons

Лишаев¹,

Knysh²,

Коротаев³

2019

MGZh

View full text Add to dashboard Cite

Ключевые слова: псевдоизмерения температуры и солености, альтиметрия, буи Argo, базовый горизонт, функции ковариаций, реанализ, адаптивная статистика. Благодарности: результаты исследования, проведенные в рубрике «Процедура восстановления трехмерных полей псевдоизмерений солености и температуры в слое моря 2,5-125 м», получены в рамках государственного задания по теме № 0827-2014-0011 «Исследования закономерностей изменений состояния морской среды на основе оперативных наблюдений и дан-МОРCКОЙ ГИДРОФИЗИЧЕСКИЙ ЖУРНАЛ том 35 № 2 2019 115 ных системы диагноза, прогноза и реанализа состояния морских акваторий». Остальные результаты исследований, представленные в работе, получены при финансовой поддержке гранта Российского научного фонда (проект № 17-77-30001) и РФФИ, грант № 16-05-00264 А.

show abstract

Modeling of Long-Term Evolution of Hydrophysical Fields of the Black Sea

Cited by 7 publications

References 8 publications

Reconstruction of the Black Sea Deep-Water Circulation Using INMOM and Comparison of the Results with the ARGO Buoys Data

Reconstruction of the Black Sea Deep-Water Circulation Using INMOM and Comparison of the Results with the ARGO Buoys Data

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

Reconstruction of Temperature and Salinity in the Uupper Layer of the Black Sea Using Pseudo-Measurements on the Underlying Horizons

Contact Info

Product

Resources

About