Variational assimilation of observation data in the mathematical model of the Black Sea taking into account the tide-generating forces

2015 ◽  
Vol 30 (3) ◽  
Author(s):  
Valeriy I. Agoshkov ◽  
Maksim V. Assovskii ◽  
Vladimir B. Zalesny ◽  
Natalia B. Zakharova ◽  
Eugene I. Parmuzin ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Black Sea ◽  
Sea Surface ◽  
The Black Sea ◽  
Observation Data ◽  
Variational Assimilation ◽  
Flux Function ◽  
The Mean ◽  
The Mathematical Model ◽  
Satellite Altimetry Data

AbstractA mathematical model of the dynamics of the Black and the Azov Seas is considered taking into account tide-generating forces. The problem of variational assimilation of sea surface temperature (SST) data is formulated and studied. Based on variational assimilation of satellite altimetry data, we propose an algorithm for solving the inverse problem of reconstruction of potential forces affecting the formation of the mean level and present a method of approximate solution of this problem.We also present numerical experiments concerning the study of the influence of tide-generating forces on the dynamics of the Black Sea and restoration of the heat flux function in the problem of variational data assimilation of SST observations

Variational assimilation of observation data in the mathematical model of the Baltic Sea dynamics

2015 ◽  
Vol 30 (4) ◽  
Author(s):  
Valeriy I. Agoshkov ◽  
Eugene I. Parmuzin ◽  
Vladimir B. Zalesny ◽  
Victor P. Shutyaev ◽  
Natalia B. Zakharova ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Heat Flux ◽  
Baltic Sea ◽  
Satellite Observation ◽  
Sea Surface ◽  
Observation Data ◽  
The Baltic Sea ◽  
Variational Assimilation ◽  
The Baltic ◽  
The Mathematical Model

AbstractA mathematical model of the dynamics of the Baltic Sea is considered. A problem of variational assimilation of sea surface temperature (SST) data is formulated and studied. Based on variational assimilation of satellite observation data, an algorithm solving the inverse problem of heat flux restoration on the interface of two media is proposed. The results of numerical experiments reconstructing the heat flux functions in the problem of variational assimilation of SST observation data are presented. The influence of SST assimilation on other hydrodynamic parameters of the model is considered.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 1(10)2011 (1(10)) ◽  
pp. 27-30
Author(s):  
N. Marchenko ◽  
◽  
N.P. Yarema ◽  
T.R. Pavliv ◽  
◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Surface Topography ◽  
Black Sea ◽  
Satellite Altimetry ◽  
Sea Surface ◽  
The Black Sea ◽  
Altimetry Data ◽  
Sea Surface Topography ◽  
Satellite Altimetry Data

The study of Black Sea and Mediterranean Sea surface altitudes was carried out based on satellite altimetry data. The model of the Black Sea and Mediterranean Sea surface topography (SST) was build. The comparison of received results with the European quasigeoid was done.

scholarly journals Processing and assimilation of observation data for the hydrodynamics model of the Black Sea and the Sea of Azov

2021 ◽  
Vol 2131 (2) ◽  
pp. 022010
Author(s):  
N B Zakharova ◽  
T O Sheloput ◽  
N R Lezina ◽  
V P Shutyaev ◽  
E I Parmuzin ◽  
...  
Keyword(s):  
Black Sea ◽  
Incomplete Data ◽  
Numerical Experiments ◽  
The Black Sea ◽  
Observation Data ◽  
Computational System ◽  
Variational Assimilation ◽  
The Earth ◽  
Marine Data ◽  
Sea Area

Abstract This work is aimed at using the marine data of the Shared Use Centre (SUC) “IKI-Monitoring” in the variational assimilation procedures of the Informational Computational System (ICS) “INM RAS - Black Sea”. SUC “IKI - Monitoring” is a tool for obtaining remote sensing observations on the Earth state. In the paper observation data information is given, data processing procedures are described, algorithms for the assimilation of the information received and several specific features of the numerical model used are presented. Results of the variational assimilation of two sets of observation data are presented and discussed. Numerical experiments have confirmed the possibility of using incomplete data from satellites in the problems of modelling the sea area.

scholarly journals Variational Data Assimilation in the Mathematical Model of the Black Sea Dynamics

2019 ◽  
Vol 26 (6) ◽  
Author(s):  
V. I. Agoshkov ◽  
V. P. Shutyaev ◽  
E. I. Parmuzin ◽  
N. B. Zakharova ◽  
T. O. Sheloput ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Data Assimilation ◽  
Black Sea ◽  
Variational Data Assimilation ◽  
The Black Sea ◽  
The Mathematical Model

scholarly journals New SMOS SSS maps in the framework of the Earth Observation data For Science and Innovation in the Black Sea

2021 ◽  
Author(s):  
Estrella Olmedo ◽  
Verónica González-Gambau ◽  
Antonio Turiel ◽  
Cristina González-Haro ◽  
Aina García-Espriu ◽  
...  
Keyword(s):  
Black Sea ◽  
European Space Agency ◽  
Earth Observation ◽  
Sea Surface ◽  
The Black Sea ◽  
Observation Data ◽  
Surface Salinity ◽  
Level 3 ◽  
Earth Observation Data ◽  
Level 2

Abstract. In the framework of the European Space Agency (ESA) regional initiative called Earth Observation data For Science and Innovation in the Black Sea (EO4SIBS), a new dedicated Soil Moisture and Ocean Salinity (SMOS) Sea Surface Salinity (SSS) product is generated for the Black Sea for the years 2011–2020. Three SMOS SSS fields are retrieved and distributed: a level 2 product consisting of binned SSS in daily maps at 0.25° × 0.25° spatial resolution grid by considering ascending ((Olmedo et al., 2021b), https://doi.org/10.20350/digitalCSIC/13993) and descending ((Olmedo et al., 2021c), https://doi.org/10.20350/digitalCSIC/13995) satellite overpass directions separately; a level 3 product ((Olmedo et al., 2021d), https://doi.org/10.20350/digitalCSIC/13996) consisting of binned SSS in 9-day maps at 0.25° × 0.25° grid by combining as cending and descending satellite overpass directions; and a level 4 product ((Olmedo et al., 2021e), https://doi.org/10.20350/digitalCSIC/13997) consisting of daily maps at 0.05 × 0.0505° that are computed by merging the level 3 SSS product with Sea Surface Temperature (SST) maps. The generation of SMOS SSS fields in the Black Sea requires the use of enhanced data processing algorithms for improving the Brightness Temperatures in the region since this basin is typically strongly affected by Radio Frequency Interference (RFI) sources which hinders the retrieval of salinity. Here, we describe the algorithms introduced to improve the quality of the salinity retrieval in this basin. The validation of the EO4SIBS SMOS SSS products is performed by: i) comparing the EO4SIBS SMOS SSS products with near-to-surface salinity measurements provided by in situ measurements; ii) assessing the geophysical consistency of the products by comparing them with a model and other satellite salinity measurements; iii) computing maps of SSS errors by using Correlated Triple Collocation analysis. The accuracy of the EO4SIBS SMOS SSS products depend on the time period and on the product level. The accuracy in the period 2016–2020 is better than in 2011–2015 and it is as follows for the different products: i) Level 2 ascending: 1.85 / 1.50 psu (in 2011–2015 / 2016–2020); Level 2 descending: 2.95 1.95 psu; ii) Level 3: 0.7 / 0.5 psu; and iii) Level 4: 0.6 / 0.4 psu.

scholarly journals Variational Data Assimilation in the Mathematical Model of the Black Sea Dynamics

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
V. I. Agoshkov ◽  
◽  
V. P. Shutyaev ◽  
E. I. Parmuzin ◽  
N. B. Zakharova ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Data Assimilation ◽  
Black Sea ◽  
Variational Data Assimilation ◽  
The Black Sea ◽  
The Mathematical Model

scholarly journals Geostrophic currents and kinetic energies in the Black Sea estimated from merged drifter and satellite altimetry data

2013 ◽  
Vol 10 (5) ◽  
pp. 1505-1524
Author(s):  
M. Menna ◽  
P. -M. Poulain
Keyword(s):  
Kinetic Energy ◽  
Black Sea ◽  
Satellite Altimetry ◽  
The Black Sea ◽  
Altimetry Data ◽  
Velocity Statistics ◽  
The Mean ◽  
Intense Activity ◽  
Surface Geostrophic Circulation ◽  
Satellite Altimetry Data

Abstract. Drifter measurements and satellite altimetry data are merged to reconstruct the surface geostrophic circulation of the Black Sea in the period 1999–2009. This combined dataset is used to estimate pseudo-Eulerian velocity statistics for different time periods. Seasonal and interannual variability of currents and kinetic energy fields are described with particular attention to the mesoscale and sub-basin coastal eddies. The mean currents are generally stronger in winter and enhanced speeds are observed in the period 2002–2006. The most intense activity of sub-basin Batumi Eddy occurs in summer with greater speeds and dimensions in 2006 and 2008. The sub-basin Sevastopol Eddy is generated in spring from a meander of the Rim Current. Mesoscale eddies located along the Anatolia, Caucasus and Crimea coasts are permanent, quasi-permanent or intermittent features and can interact and merge with each other, showing higher values of kinetic energy.

CORRELATION OF THE BLACK, MARMARA AND AEGEAN SEAS DURING THE HOLOCENE

2017 ◽  
Author(s):  
Nikolay Esin ◽  
Nikolay Esin ◽  
Vladimir Ocherednik ◽  
Vladimir Ocherednik
Keyword(s):  
Mathematical Model ◽  
Sea Level ◽  
Black Sea ◽  
Aegean Sea ◽  
The Black Sea ◽  
Sea Level Changes ◽  
The Holocene

A mathematical model describing the change in the Black Sea level depending on the Aegean Sea level changes is presented in the article. Calculations have shown that the level of the Black Sea has been repeating the course of the Aegean Sea level for the last at least 6,000 years. And the level of the Black Sea above the Aegean Sea level in the tens of centimeters for this period of time.

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