Konstantin V. Ushakov

Konstantin V. Ushakov
P.P. Shirshov Institute of Oceanology · Physical

PhD

About

36
Publications
1,650
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132
Citations
Citations since 2017
21 Research Items
104 Citations
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20172018201920202021202220230102030
20172018201920202021202220230102030

Publications

Publications (36)
Preprint
Full-text available
We propose a new approach to the optimal placement of sensors for the problem of reconstructing geophysical fields from sparse measurements. Our method consists of two stages. In the first stage, we estimate the variability of the physical field as a function of spatial coordinates by approximating its information entropy through the Conditional Pi...
Article
Full-text available
Numerical simulation results of the Black Sea circulation obtained by four ocean dynamics models are compared to each other and to in situ data in order to determine the features of the Black Sea deep-water circulation such as deep-water undercurrents. The year 2011 is chosen as the test period due to the availability of deep-sea observations, incl...
Preprint
Full-text available
The Arctic Ocean plays an important role in the global climate system, where sea ice regulates the exchange of heat, moisture and momentum between the atmosphere and the ocean. A comprehensive analysis and forecast of the Arctic ocean system requires a detailed numerical ocean and sea ice coupled model supplemented by assimilation of observational...
Chapter
The paper describes the construction of the coupled ocean-ice Global model INMIO-CICE-CMF2.0 for predicting the state of water and ice in the Arctic Ocean with high spatial resolution (0.1°). The 3D ocean model INMIO is developed at the Institute of Numerical Mathematics and Institute of Oceanology, Russian Academy of Sciences. The sea-ice model CI...
Article
В работе рассматриваются результаты моделирования внутригодовой изменчивости циркуляции вод и льда Северного Ледовитого океана с применением трехмерной модели динамики океана ИВМИО4.1 и модели морского льда CICE5.1. Совместная модель реализована на массивно-параллельных компьютерах под управлением Программного комплекса совместного моделирования CM...
Article
In this work, results of modeling the intra-annual variability of water and ice circulation in the Arc-tic Ocean by means of the INMIO4.1 three-dimensional model of ocean dynamics and the CICE5.1 sea-ice model are considered. The coupled ocean-ice model is implemented on massively parallel computers under the control of the CMF2.0 cosimulation soft...
Chapter
Most of the WMO Global Producing Centres for Long-Range Forecasts use ensemble prediction systems together with an ensemble re-forecast dataset, also called hindcast. Both ensembles usually come from integrations of a global coupled atmosphere, ocean, land-surface and sea ice model. This article describes SLAV–INMIO–CICE coupled model developed at...
Article
Full-text available
The reproduction of equatorial thermocline characteristics by numerical models is of great importance for seasonal forecasts, and it is also a key factor in operational ocean forecasting. Due to difficulties in the numerical description of adiabatic eddy processes, the model thermocline is usually diffused and shifted in depth. In this work, we per...
Article
Full-text available
С помощью вихреразрешающей модели выполнен расчёт вихревого меридионального переноса тепла (ВМПТ) в Мировом океане. Его распределение связано с интенсивными течениями и образует несколько характерных типов структур. Сравнение с результатами других моделей показывает, что для правильного воспроизведения ВМПТ предпочтительно явное описание вихревой д...
Article
Eddy meridional heat transport (EMHT) in the World Ocean is calculated using the eddy-resolving model. Its distribution is related to intense eddies and forms several typical structural types. The comparison with the results of other models shows that an explicit description of eddy dynamics is preferable for correct reproduction of EMHT.
Article
SLAV–INMIO–CICE is the coupled atmosphere–ocean–ice model developed at Marchuk Institute of Numerical Mathematics (INM) Russian Academy of Sciences (RAS), Shirshov Institute of Oceanology RAS and Hydrometeorological Centre of Russia (HMCR). The model components are coupled using the new version of the own developed Compact Modeling Framework (CMF)....
Article
Full-text available
Abstract. Using an eddy-resolving ocean general circulation model called INMIO, we study mean thermohydrodynamic conditions in which the equatorial convergence of eddy meridional heat transport (MHT) is formed by tropical instability waves (TIWs). In nature the TIWs warm the well-known cold tongue of the East Pacific waters. The model has sufficien...
Article
The characteristics and formation conditions of eddy meridional heat transport (MHT) in the eastern equatorial Pacific are studied using the results of eddy-resolving numerical modeling as compared with observational and reanalysis data. Calculations of the eddy MHT convergence at the equator are performed and realistic results in the analyzed regi...
Article
Full-text available
We present a new version of the Compact Modeling Framework (CMF3.0) developed for the software environment of stand-alone and coupled global geophysical fluid models. The CMF3.0 is designed for use on high- and ultrahigh-resolution models on massively parallel supercomputers. The key features of the previous CMF, version 2.0, are mentioned to refle...
Article
Full-text available
Eddy-induced meridional heat transport (EMHT) distribution in the world ocean is calculated by means of the eddy-resolving model INMIO, with atmospheric and radiative forcing defined by the CORE-II protocol data in 1978-1982. The EMHT is defined as the deviation of the total MHT value from the one calculated on the basis of 3-month running means of...
Article
Full-text available
We present new version of the Compact Modeling Framework (CMF3.0) developed for providing the software environment for stand-alone and coupled models of the Global geophysical fluids. The CMF3.0 designed for implementation high and ultra-high resolution models at massive-parallel supercomputers. The key features of the previous CMF version (2.0) a...
Article
The results of simulations performed by the CORE-II scenario using the two Russian OGCMs, INMOM and INMIO, are presented. The models use different coordinate systems in the basic set of primitive equations and different numerical techniques. Both models are used as oceanic components of the INM RAS coupled models. Simulations have shown that reprod...
Article
Full-text available
In this paper, the first results of a simulation of the mean World Ocean thermohaline characteristics obtained by the INMIO ocean general circulation model configured with 0.1 degree resolution in a 5-year long numerical experiment following the CORE-II protocol are presented. The horizontal and zonal mean distributions of the solution bias against...
Article
Full-text available
The first results of simulation of the seasonal variability of the Arctic and North Atlantic ocean waters and ice by a coupled model based on a full three-dimensional ocean dynamics model INMIO4.1 and a sea-ice model CICE5.1 are considered. The coupled model can be run on massively parallel computers under control of the Compact Modelling Framework...
Article
Coupled atmosphere–ocean models are widely used for climate change modelling. However, there is now more and more evidence on necessity to use such models in numerical weather prediction at different time scales. A coupled model is developed at the Institute of Numerical Mathematics, Shirshov Institute of Oceanology (Russian Academy of Sciences), a...
Article
Due to a lack of observational data, the hydrological fields of temperature, salinity, and density used by oceanographers at present remain significantly smoothed. Specifically, this refers to the WOA data distributed freely by the group of Sidney Levitus. This study describes the history of synthesis of hydrological data and mathematical modeling...
Article
A numerical experiment on the reproduction of the variability in the state of North Atlantic water in 1948–2007 with a spatial resolution of 0.25° has been performed using the global ocean model developed at Institute of Numerical Mathematics, Russian Academy of Sciences (INM RAS), and the Shirshov Institute of Oceanology (IO RAS) (the INM–IO model...
Article
The INM-IO numerical World Ocean model is verified through the calculation of the model ocean climate. The numerical experiment was conducted for a period of 500 years following the CORE-I protocol. We analyze some basic elements of the large-scale ocean circulation and local and integral characteristics of the model solution. The model limitations...
Conference Paper
Full-text available
We present results of eddy-resolving simulation of the global ocean with INM-IO general circulation model. The global grid employs tripole layout, has 0.1-degree horizontal resolution, and uses 49 vertical levels. The ocean model coupled with sea ice and atmospheric boundary layer sub-models. We address to the problem of effective implementation of...
Conference Paper
Full-text available
An eddy-resolving numerical ocean model is used to study intra- and inter-annual variability of the World Ocean. In study we use z-coordinate global ocean circulation model with 1/10 degree horizontal resolution and 49 vertical levels. The model is based on the system of three-dimensional primitive equations of ocean dynamics. A numerical method is...
Article
This work is a part of the program for developing a new modern eddy-resolving World Ocean model at the Institute of Numerical Mathematics (INM) and the Institute of Oceanology (IO) of the Russian Academy of Sciences (Ibrayev et al., 2012). The aims of the work are checking the model's characteristics, tuning of the model in conditions of the CORE-I...
Article
Full-text available
The first results on simulating the intra-annual variability of the World Ocean circulation by use of the eddy-resolving model are considered. For this purpose, a model of the World Ocean with a 1/10° horizontal resolution and 49 vertical levels was developed (a 1/10 × 1/10 × 49 model of the World Ocean). This model is based on the traditional syst...

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Projects

Projects (2)
Project
The project aims to study the Black Sea deep-water dynamics reconstructed by modern ocean circulation models and measurements data. The numerical experiments results will be obtained by using of four different high-resolving models. We are going to apply MHI, INMOM, INM-IO, NEMO models. The multi-modal approach helps us to estimate some numerical errors and inaccuracies. Validation of the calculated hydrophysical fields will be carried out using of in-situ data measured in the abyssal part of the sea (probes CTD, ADCP, buoys Argo). The results of complex processing of the model outputs allow us to obtaine three-dimensional arrays of the Black Sea currents velocity, to analyze the features of spatial-temporal variability of currents fields at various depths, and to reveale synoptic and mesoscale dynamic structures. As the main project result we plan to get the hydrophysical characteristics dataset reflecting the real state of the Black Sea deep-water circulation. It is also supposed to check the hypothesis of the existence of deep current (countercurrent) moving along the continental slope in direction opposite to the RIM Current, which described in some science publications.
Project
Development of technology of ultra-high resolution mathematical simulation of the global ocean with assimilation of massive aerospace monitoring data for solutions of weather forecast and climate problems on massively parallel computing systems