Modeling of Unsteady Geophysical Processes on the Shelf of the Sea of Japan

Liapidevskii, V. Yu.; Khrapchenkov, F. F.; Чесноков, А. А.; Yaroshchuk, I. O.

doi:10.1134/s0015462822010062

Cited by 9 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, to study background fluctuations in the sound speed, when amplitudes of these fluctuations are 1-2 m/s, it is required to measure salinity with an accuracy of 0.1-0.2 psu, because @c/@s ≈ 1 [m/s]/psu (Figure 14). Increased requirements for the accuracy of determining the density of water may also arise for calculating the equations of multilayer shallow water [54]. The range of salinity variation in the study area of Peter the Great Bay (the Sea of Japan) is about 3 psu, which is why using some average salinity for solving the set tasks is unacceptable.…”

Section: Discussionmentioning

confidence: 99%

Estimation of Seawater Hydrophysical Characteristics from Thermistor Strings and CTD Data in the Sea of Japan Shelf Zone

Yaroshchuk

Kosheleva

Lazaryuk

et al. 2023

JMSE

View full text Add to dashboard Cite

The knowledge of salinity in a specific sea area with high accuracy is required to solve several acoustic and hydrophysical problems on the ocean shelf. Unlike temperature, which can be measured continuously for a long time, with, for example, thermistor strings (thermostrings), salinity values of required accuracy can be obtained only using CTD profiling. This is why methods of estimating salinity from temperature could be helpful. In this paper, the authors propose using the regression method for solving this type of problem and demonstrate the efficiency of this method using examples of temperature measurements from anchored thermostrings. For the correct construction of regressions, the authors analyzed the errors of CTD measurements and suggested a method for the dynamic correction of raw CTD data. From CTD profiling datasets of 12 years (2011–2022), after their dynamic correction, the authors obtained regression polynomial formulas for calculating salinity from temperature and studied data stability in space and time at the hydrophysical test site, located in the shelf zone of the Sea of Japan. The authors consider this method efficient and applicable in solving a variety of acoustic and hydrophysical problems.

show abstract

Section: Discussionmentioning

confidence: 99%

Estimation of Seawater Hydrophysical Characteristics from Thermistor Strings and CTD Data in the Sea of Japan Shelf Zone

Yaroshchuk

Kosheleva

Lazaryuk

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

Strongly non-linear Boussinesq-type model of the dynamics of internal solitary waves propagating in a multilayer stratified fluid

2023

View full text Add to dashboard Cite

We propose a system of first-order balance laws that describe the propagation of internal solitary waves in a multilayer stratified shallow water with non-hydrostatic pressure in the upper and lower layers. The construction of this model is based on the use of additional variables, which make it possible to approximate the Green–Naghdi-type dispersive equations by a first-order system. In the Boussinesq approximation, the governing equations allow one to simulate the propagation of non-linear internal waves, taking into account fine density stratification, a weak velocity shear in the layers, and uneven topography. We obtain smooth steady-state soliton-like solutions of the proposed model in the form of symmetric and non-symmetric waves of mode-2 adjoining to a given multilayer constant flow. Numerical calculations of the generation and propagation of large-amplitude internal waves are carried out using both the proposed first-order system and Green–Naghdi-type equations. It is established that the solutions of these models practically coincide. The advantage of the first-order equations is the simplicity of numerical implementation and a significant reduction in the calculation time. We show that the results of numerical simulation are in good agreement with the experimental data on the evolution of mode-2 solitary waves in tanks of constant and variable height.

show abstract

Special Aspects of Transformation of Non-Linear Internal Waves on the Shelf and in a Deep Lake

Kirillov,

Liapidevskii,

Sutorikhin

et al. 2023

Fluid Dyn

View full text Add to dashboard Cite

Modeling of Unsteady Geophysical Processes on the Shelf of the Sea of Japan

Cited by 9 publications

References 22 publications

Estimation of Seawater Hydrophysical Characteristics from Thermistor Strings and CTD Data in the Sea of Japan Shelf Zone

Estimation of Seawater Hydrophysical Characteristics from Thermistor Strings and CTD Data in the Sea of Japan Shelf Zone

Strongly non-linear Boussinesq-type model of the dynamics of internal solitary waves propagating in a multilayer stratified fluid

Special Aspects of Transformation of Non-Linear Internal Waves on the Shelf and in a Deep Lake

Contact Info

Product

Resources

About