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Dr. Yana Saprykina
Shirshov Institute of Oceanology Russian Academy of Sciences

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Research Keywords & Expertise

0 Coastal Engineering
0 Spectral Analysis
0 wavelet analysis
0 wave modelling
0 Coastal structures

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laboratory experiments
nonlinear waves
Spectral Analysis
wavelet analysis
Freak waves
wave modelling

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Short Biography

Leading Researcher V.P.Zenkovich Laboratory of Shelf and Sea Coasts, P.P.Shirshov Institute of Oceanology of Russian Academy of Sciences, EDUCATION AND ACADEMIC DEGREES 1981-1986 Novosibirsk State University, Department of Mechanics and Applied Mathematic, Masters degree 2003 - Ph.D. Thesis “Transformation of irregular waves in coastal zone”, specialty – “Oceanology” EMPLOYMENT 1985-1987 M.A.Lavrentiev Institute of Hydrodynamics, Siberian Branch of Russian Academy of Sciencies, Novosibirsk, researcher 1987-2003 Institute for Water and Environmental Problems, Siberian Branch of Russian Academy of Sciencies, Novosibirsk, researcher 2003- P.P.Shirshov Institute of Oceanology of Russian Academy of Sciencies, Moscow, Senior researcher EXPERIENCE Hydrodynamics, mathematical modeling, nonlinear wave dynamics; experimental investigation of wave in field and in laboratory conditions. Participant and organizer of 5 field and 7 laboratory experiments on coastal zone waves and sediments dynamic.

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Journal article
Published: 08 May 2021 in Geosciences
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The study investigates cross-shore outer sand bar dynamics in an open-coast non-tidal beach at the Bulgarian Black Sea due to wave climate. On seasonal to short-term (1–2 years) time scale, monthly field measurements of the outer bar profiles were related to respective modeled nearshore wave data. Hereby, seaward-shoreward bar migration was examined depending on the wave forcing, wave non-linearity, wave transformation scenarios, storms and direction of wave incidence. Analysis revealed that intra-annually highly non-linear waves were responsible for outer bar displacement, while the direction of migration depended on wave period, duration of conditions with wave steepness >0.04, angle of approach and total duration of storms. Short-term bar evolution was mainly governed by wave height and storms’ parameters as the angle of approach and duration. The correlation between the outer bar location and wave height annual variations initiated the first for the explored Black Sea region examination of possible connection between wave height’s temporal fluctuations and the variability of climatic indices the North Atlantic Oscillation (NAO), the Atlantic Multi-decadal Oscillation (AMO), the East Atlantic Oscillation (EA), the Arctic Oscillation (AO), the East Atlantic-Western Russia (EA/WR) and the Scandinavian (SCAND) patterns. According to the results the inter-annual outer bar location may vary depending on periods of maximum annual wave fluctuations, which in turn predominantly depend on indices the EA (4–5, 10–11, 20–30 years), the EA/WR (2–4, 9–13 years) and the NAO (15 years).

ACS Style

Nataliya Andreeva; Yana Saprykina; Nikolay Valchev; Petya Eftimova; Sergey Kuznetsov. Influence of Wave Climate on Intra and Inter-Annual Nearshore Bar Dynamics for a Sandy Beach. Geosciences 2021, 11, 206 .

AMA Style

Nataliya Andreeva, Yana Saprykina, Nikolay Valchev, Petya Eftimova, Sergey Kuznetsov. Influence of Wave Climate on Intra and Inter-Annual Nearshore Bar Dynamics for a Sandy Beach. Geosciences. 2021; 11 (5):206.

Chicago/Turabian Style

Nataliya Andreeva; Yana Saprykina; Nikolay Valchev; Petya Eftimova; Sergey Kuznetsov. 2021. "Influence of Wave Climate on Intra and Inter-Annual Nearshore Bar Dynamics for a Sandy Beach." Geosciences 11, no. 5: 206.

Original research article
Published: 22 April 2021 in Frontiers in Marine Science
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Mudbanks (MBs) are a natural phenomenon, forming along the southwest coast of India during southwest monsoon (SWM), almost every year. High waves initiate these formations. The temporal variability (both intra-annual and multi-decadal) of wave climate of the southeastern Arabian Sea (AS) is related to main climate indices which determine climate fluctuations in this region, and based on that, occurrence of MBs is illustrated. Voluntary Observing Ships data and climate indices such as El Niño phenomenon index for the site 5N-5S and 170W-120W (NINO3.4), El Niño/Southern Oscillation (ENSO), Southern Oscillation Index (SOI), Pacific Decadal Oscillation (PDO), AAO, Atlantic Multi-decadal Oscillation (AMO), and IO Dipole (IOD) have been analyzed. Using wavelet correlation method, high correlations with positive and negative phase of climatic indices (IOD, SOI, NINO3.4, ENSO, AMO, PDO, and AAO) fluctuations in heights of wind waves and swell and time lags between them on monthly, yearly, decadal, and multi-decadal time scales are identified. For the first time, high correlation between the annual fluctuations of AMO and monthly average wave heights is shown. It has been found that the El Niño phenomenon plays a major role in the variability of wave climate of the southeastern AS for all time scales. A strong variability in wave climate at short time scales, such as 0.5, 1, 3.0–3.5, 4–5, and 7–8 years, is evident from the analyses. Decadal changes correspond to 10, 12–13, and 16 years. The influence of El Niño is manifested with a delay of several months (3–6) on annual time scales and about 1–2 years on a decadal and multi-decadal time scales. Possible connection between the occurrence of MBs and variability in wave climate in the southeastern AS is shown for the periods 7, 10–12, 18–20, and about 40 years correlating with fluctuation in the climate indices—IOD, ENSO, NINO3.4, and SOI. It is shown that intra-annual fluctuations in occurrence and duration of existence of MBs depend on the distribution of highest monthly averaged significant wave heights (SWHs) in the summer monsoon cycle.

ACS Style

Yana V. Saprykina; S. V. Samiksha; Sergey Yu. Kuznetsov. Wave Climate Variability and Occurrence of Mudbanks Along the Southwest Coast of India. Frontiers in Marine Science 2021, 8, 1 .

AMA Style

Yana V. Saprykina, S. V. Samiksha, Sergey Yu. Kuznetsov. Wave Climate Variability and Occurrence of Mudbanks Along the Southwest Coast of India. Frontiers in Marine Science. 2021; 8 ():1.

Chicago/Turabian Style

Yana V. Saprykina; S. V. Samiksha; Sergey Yu. Kuznetsov. 2021. "Wave Climate Variability and Occurrence of Mudbanks Along the Southwest Coast of India." Frontiers in Marine Science 8, no. : 1.

Journal article
Published: 18 September 2020 in Journal of Marine Science and Engineering
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The evolution of wind waves in coastal zones leads to changes in the shape of the wave spectrum. Along the coast of Kerala, due to the presence of mudbanks during the southwest monsoon, we could observe downshifting of the peak frequency in the wave spectral data. The present study aims at proving the mechanism of frequency downshifting and possible influence of the downshifting process on mudbank formation. The results of SWASH (Simulating WAves till SHore) modeling and bispectral analysis shows that frequency downshifting occurs due to the difference nonlinear triad interactions of the main frequency peak of the wave spectrum with frequencies of the infragravity range independent of the viscosity of the medium. The increase in wave dissipation accelerates frequency downshifting additionally, decreasing the wave energy in the main peak frequency. It is shown that frequency downshifting can be one of the possible wave mechanisms of mudbank formation due to essentially different wave attenuation coefficients at the beginning and end of this process. For muddy cohesive sediments, it will lead to formation with an erosive profile at first and then an accumulative profile, i.e., mudbank formation.

ACS Style

Yana Saprykina; Margarita Shtremel; Samiksha Volvaiker; Sergey Kuznetsov. Frequency Downshifting in Wave Spectra in Coastal Zone and Its Influence on Mudbank Formation. Journal of Marine Science and Engineering 2020, 8, 723 .

AMA Style

Yana Saprykina, Margarita Shtremel, Samiksha Volvaiker, Sergey Kuznetsov. Frequency Downshifting in Wave Spectra in Coastal Zone and Its Influence on Mudbank Formation. Journal of Marine Science and Engineering. 2020; 8 (9):723.

Chicago/Turabian Style

Yana Saprykina; Margarita Shtremel; Samiksha Volvaiker; Sergey Kuznetsov. 2020. "Frequency Downshifting in Wave Spectra in Coastal Zone and Its Influence on Mudbank Formation." Journal of Marine Science and Engineering 8, no. 9: 723.

Journal article
Published: 13 June 2020 in Applied Sciences
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On the basis of field experiment data, the main features of influence of non-linear wave transformation scenarios on cross-shore sediment transport in coastal zones were investigated. The bottom deformations due to the non-linear wave transformation follow the specific scenario. The increase in the second non-linear harmonic amplitude leads to the erosion of the underwater slope at the distances corresponding to this process, with the subsequent accumulation of sandy material closer to the shore at distances where the amplitude decreases during the backward energy transfer to the first harmonic. This can be explained by the change in the phase shift between harmonics during non-linear wave transformation. The second harmonic maximum provides the point near which the bottom deformations occur in different directions. Scenarios of non-linear wave transformation in which backward energy transfer from the second non-linear harmonic to the first is close to the shoreline will contribute to the transport and accumulation of the sediment on the coast. These scenarios are more characteristic of “small waves”. The scenario without a periodical exchange of wave energy between non-linear harmonics (with an increase in the second harmonic only) that is characteristic of large storm waves and plunging breaking waves will lead to the erosion of the underwater bottom profile.

ACS Style

Yana Saprykina. The Influence of Wave Nonlinearity on Cross-Shore Sediment Transport in Coastal Zone: Experimental Investigations. Applied Sciences 2020, 10, 1 .

AMA Style

Yana Saprykina. The Influence of Wave Nonlinearity on Cross-Shore Sediment Transport in Coastal Zone: Experimental Investigations. Applied Sciences. 2020; 10 (12):1.

Chicago/Turabian Style

Yana Saprykina. 2020. "The Influence of Wave Nonlinearity on Cross-Shore Sediment Transport in Coastal Zone: Experimental Investigations." Applied Sciences 10, no. 12: 1.

Journal article
Published: 01 January 2020 in Physics of Wave Phenomena
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Experimental data demonstrate dependence of wave breaking type on wave amplitude-frequency-phase structure that is determined by nonlinear wave transformation. The spilling and plunging breaking waves are differed in the symmetry of the wave profile and the ratio of the amplitudes of the 1st and 2nd harmonics in breaking wave. The wave profile symmetry, in turn, is determined by the phase shift between these harmonics. In spilling breaking waves, it is close to zero, which corresponds to symmetrical waves. In plunging breaking waves, the phase shift is negative, which corresponds to the forward shifted 2nd harmonic. The ratio of the amplitudes of the 1st and 2nd harmonics in spilling breaking waves is less than that in plunging breaking waves. The periodic energy exchange between harmonics during near resonant triad wave interactions is the reason for the change in the types of wave breaking for waves propagating above a gentle inclined bottom. Due to the different structure, plunging breaking waves contribute to the erosion of the cross-shore underwater profile, while spilling breaking waves contribute to the accumulation of sand on it.

ACS Style

Ya. V. Saprykina; S. Yu. Kuznetsov; O. A. Kuznetsova; I. V. Shugan; Yang-Yih Chen. Wave Breaking Type as a Typical Sign of Nonlinear Wave Transformation Stage in Coastal Zone. Physics of Wave Phenomena 2020, 28, 75 -82.

AMA Style

Ya. V. Saprykina, S. Yu. Kuznetsov, O. A. Kuznetsova, I. V. Shugan, Yang-Yih Chen. Wave Breaking Type as a Typical Sign of Nonlinear Wave Transformation Stage in Coastal Zone. Physics of Wave Phenomena. 2020; 28 (1):75-82.

Chicago/Turabian Style

Ya. V. Saprykina; S. Yu. Kuznetsov; O. A. Kuznetsova; I. V. Shugan; Yang-Yih Chen. 2020. "Wave Breaking Type as a Typical Sign of Nonlinear Wave Transformation Stage in Coastal Zone." Physics of Wave Phenomena 28, no. 1: 75-82.

Journal article
Published: 12 September 2019 in Ocean & Coastal Management
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The Black Sea basin is a unique and very complex environment in the World Ocean as a result of its evolution, location and history. This is the reason why in the last years there is an increasing scientific interest in deciphering the processes and mechanisms governing this area. Besides the well-known environmental problems of the basin related to pollution, eutrophication, overfishing and loss of biodiversity, erosion (as a result of storminess, sea level rise and human interventions) is affecting many coasts around the Black Sea. This paper deals with an evaluation of the erosion hazards along the Black Sea coasts, (through an in-depth and well-grounded scientific analysis of a comprehensive database of multiple sources), together with the discussion of erosion management issues at basin scale (through literature review and risk perceptions analysis related to planning strategies, protection measures, legislation and administrative implementation). For this endeavour, we have computed a Coastal Sensitivity Index (CSI) at 1-km spatial scale for more than 4000 sectors around the Black Sea, taking into consideration geological–geomorphological and physical characteristics of each sector through the following parameters: type of coast (coastal geomorphology and lithology), coastal slope (from shoreline to 20 m depth), shoreline changes in the last 33 years, wave incidence (the angle between the shoreline and the dominant storm waves), significant wave height during storm conditions and relative sea level rise. The results for each parameter are detailed and statistically presented and are finally aggregated into CSI. Results showed circa 19% (800 km) of the Black Sea coasts are undergoing serious erosion, affecting mostly the coastlines of Romania (37%), Ukraine (29%) and Georgia (26%). The most sensitive sectors to erosion are superposed on the areas with relatively high storm waves and incidence angles: the deltaic coastlines of the main deltas (Danube, Kizilirmak, Yesilirmak, Sakarya, Rioni, Enguri, Kodori, Chorokhi) of the Black Sea, the low-lying areas along the lagoons, limans, coastal barriers and spits from Kalamitsky, Odessa and Karkinitsky Bays (Dniester, Tendrovskaya and Dzharlygachskiy areas), Chornomorske – Yevpatoriya area (in Crimea), Taman – Anapa (in Russia) and Karasu – Karaburun (in Turkey) and the rocky areas Gelendzhik – Tuapse (in Russia), Sevastopol – Cape Meganom (in Crimea) and Inebolu – Eregli (in Turkey). These highly sensitive sectors cover extensive areas along the coastlines of Russia (57%), Georgia (46%), Turkey (44%), Romania (43%) and Ukraine (35%). Implications of coastal erosion management in the Black Sea riverine countries (with different coastal legislation, EU/non-EU regulations and directives etc.) are discussed, emphasizing the main problems and shortcomings. Some guidelines for coastal erosion management in the specific case of the Black Sea are listed at the end of the paper. Despite the complicated regional geo-political context, common framework of coastal erosion management for the entire Black Sea basin is needed at all levels (political, administrative, academics and research) through cross-border cooperation related to legislation, regulations (integrated approaches for Marine Spatial Planning and Coastal Zone Management), research and academic programs, coastal zone monitoring, management/planning (prioritization of protection works and promotion of soft engineering measures) and public participation.

ACS Style

Florin Tătui; Marius Pîrvan; Mădălina Popa; Burak Aydogan; Berna Ayat; Tahsin Gormus; Dmitry Korzinin; Natașa Văidianu; Alfred Vespremeanu-Stroe; Florin Zăinescu; Sergey Kuznetsov; Luminița Preoteasa; Margarita Shtremel; Yana Saprykina. The Black Sea coastline erosion: Index-based sensitivity assessment and management-related issues. Ocean & Coastal Management 2019, 182, 104949 .

AMA Style

Florin Tătui, Marius Pîrvan, Mădălina Popa, Burak Aydogan, Berna Ayat, Tahsin Gormus, Dmitry Korzinin, Natașa Văidianu, Alfred Vespremeanu-Stroe, Florin Zăinescu, Sergey Kuznetsov, Luminița Preoteasa, Margarita Shtremel, Yana Saprykina. The Black Sea coastline erosion: Index-based sensitivity assessment and management-related issues. Ocean & Coastal Management. 2019; 182 ():104949.

Chicago/Turabian Style

Florin Tătui; Marius Pîrvan; Mădălina Popa; Burak Aydogan; Berna Ayat; Tahsin Gormus; Dmitry Korzinin; Natașa Văidianu; Alfred Vespremeanu-Stroe; Florin Zăinescu; Sergey Kuznetsov; Luminița Preoteasa; Margarita Shtremel; Yana Saprykina. 2019. "The Black Sea coastline erosion: Index-based sensitivity assessment and management-related issues." Ocean & Coastal Management 182, no. : 104949.

Journal article
Published: 11 September 2019 in Geomorphology RAS
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Effect of bar position on underwater profile of sandy beach was studied at the timescale of one storm using the xBeach numerical model. Beach profiles were extracted from the bathymetry of the Shkorpilovtsy beach (the Bulgarian coast of the Black Sea). Computed results were verified by field measurements. The largest shoreline retreat occurred in the first hour of a storm. For the chosen wave regime (largest wave height 1.5 m, wave period 10.5 s), an equilibrium profile was formed after 6 hours. The resulting profile contained an underwater terrace with the slope close to that of the theoretical equilibrium profile. It was shown that the position of the underwater bar affects the shoreline retreat rate. The smallest and the largest shore retreat occur if bar crest is located at a distance about 0.7–0.8 and 0.5 of the deep water wavelength, correspondingly. It was found that the shoreline retreat depends on the height of infragravity waves and mean wave period: the smaller mean wave period and the higher infragravity waves near the coast, the smaller is the retreat of the coastal line. Distance of seaward sediment transfer is directly relates to the height of large waves near the shore.

ACS Style

O. A. Kuznetsova; Ya. V. Saprykina. Modeling the dynamics of a sand beach governed by the wave and underwater bar interaction. Geomorphology RAS 2019, 57 -67.

AMA Style

O. A. Kuznetsova, Ya. V. Saprykina. Modeling the dynamics of a sand beach governed by the wave and underwater bar interaction. Geomorphology RAS. 2019; (3):57-67.

Chicago/Turabian Style

O. A. Kuznetsova; Ya. V. Saprykina. 2019. "Modeling the dynamics of a sand beach governed by the wave and underwater bar interaction." Geomorphology RAS , no. 3: 57-67.

Conference paper
Published: 09 June 2019 in Volume 9: Ocean Renewable Energy
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The possibility of self-acceleration of the water-wave pulse with a permanent envelope in the form of the nonlinear Airy function during its long propagation in deep water is experimentally and theoretically analyzed. This wave packet has amazing properties — accelerates without any external force, and preserves shape in a dispersive medium. The inverted Airy envelope wave function can propagate at velocity that is faster than the group velocity. We experimentally study the behavior of Airy water-wave pulses in a super-tank and long scaled propagation, to investigate its main properties, nonlinear effects and stability. Theoretical modeling analysis is based on the nonlinear Schrodinger equation. We investigate the scope of applicability, feasibility and stability conditions of nonlinear Airy wave trains in the deep water conditions; defining regimes of self-acceleration of the main pulse, immutability shape of Airy envelope; assessing the impact of nonlinearity and dissipation on the propagation of Airy waves. We analyzed the influence of the initial pulse characteristics on self-acceleration of wave packet and the stability of the envelope form. The anticipated results allow extending the physical understanding of the evolution of nonlinear dispersive waves in a wide range of initial conditions and at different spatial and temporal scales, from both theoretical and experimental points of view. Steep waves start to become an unstable, we observe spectrum widening and downshifting. Wave propagation is accompained by the intensive wave breaking and the generation of water-wave solitons.

ACS Style

Igor Shugan; Sergei Kuznetsov; Yana Saprykina; Yang-Yih Chen. Nonlinear Airy Wave Pulses on the Sea Surface. Volume 9: Ocean Renewable Energy 2019, 1 .

AMA Style

Igor Shugan, Sergei Kuznetsov, Yana Saprykina, Yang-Yih Chen. Nonlinear Airy Wave Pulses on the Sea Surface. Volume 9: Ocean Renewable Energy. 2019; ():1.

Chicago/Turabian Style

Igor Shugan; Sergei Kuznetsov; Yana Saprykina; Yang-Yih Chen. 2019. "Nonlinear Airy Wave Pulses on the Sea Surface." Volume 9: Ocean Renewable Energy , no. : 1.

Conference paper
Published: 25 March 2019 in Springer Proceedings in Earth and Environmental Sciences
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As a result of spectral analysis of experimental data obtained in laboratory and field conditions, this article points out the features of wave energy dissipation of wave breaking of different types. It was revealed, that the energy of plunging breaking mainly decreases at first and high nonlinear harmonics, and spilling breaking—within the span of first two harmonics. With the use of numerical modeling, the input of non-linear processes and dissipation into monochromatic waves transformation were separated, and it was confirmed that the dissipation rate significantly varies, depending on the type of breaking event.

ACS Style

V. V. Volkova; Ya. V. Saprykina. The Features of Energy Dissipation of Spilling and Plunging Breaking Waves. Springer Proceedings in Earth and Environmental Sciences 2019, 278 -286.

AMA Style

V. V. Volkova, Ya. V. Saprykina. The Features of Energy Dissipation of Spilling and Plunging Breaking Waves. Springer Proceedings in Earth and Environmental Sciences. 2019; ():278-286.

Chicago/Turabian Style

V. V. Volkova; Ya. V. Saprykina. 2019. "The Features of Energy Dissipation of Spilling and Plunging Breaking Waves." Springer Proceedings in Earth and Environmental Sciences , no. : 278-286.

Article
Published: 14 March 2019 in Pure and Applied Geophysics
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The variability in nearshore wave climate of the eastern part of the Black Sea was studied based on 38 years of wave hindcast data from spectral wave modelling for the period from 1979 to 2016. Correlation analysis has revealed the spatial inhomogeneity within the region on the short timescale from a few hours to one day, with the southern part being more homogeneous than the northern one. The variability of annual mean wave heights in these two regions were compared using wavelet correlation analysis. The wave climate variability at four chosen locations subject to wave modelling was correlated with climate indices (NAO, AO, AMO, PDO and EA/WR) on the following timescales: 20–30, 10–17 and 4–7 years. Despite the fact that the selected periods of fluctuations of average annual wave heights are almost the same for the chosen locations due to changes in climatic indices, a decrease or increase in amplitudes of the same frequency (multi-annual and decennial) can occur in antiphase even within the same coast. Such behavior is probably caused by complex inhomogeneous wind conditions near the coast. Fluctuations of annual mean wave heights of southern and northern coasts correlate with teleconnection patterns in antiphase on multi-decadal periods of about 20–30 years. To conclude, the nearshore wave climate variability of the eastern part of the Black Sea is inhomogeneous and therefore it can be divided at least into three regions: northeastern, northwestern and southern.

ACS Style

Yana Saprykina; Margarita Shtremel; Burak Aydoğan; Berna Ayat. Variability of the Nearshore Wave Climate in the Eastern Part of the Black Sea. Pure and Applied Geophysics 2019, 176, 3757 -3768.

AMA Style

Yana Saprykina, Margarita Shtremel, Burak Aydoğan, Berna Ayat. Variability of the Nearshore Wave Climate in the Eastern Part of the Black Sea. Pure and Applied Geophysics. 2019; 176 (8):3757-3768.

Chicago/Turabian Style

Yana Saprykina; Margarita Shtremel; Burak Aydoğan; Berna Ayat. 2019. "Variability of the Nearshore Wave Climate in the Eastern Part of the Black Sea." Pure and Applied Geophysics 176, no. 8: 3757-3768.

Journal article
Published: 26 February 2019 in Journal of Marine Science and Engineering
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The effect of the underwater bar position on a sandy beach profile was studied on a timescale of one storm, using the XBeach numerical model. The largest shoreline regress occurred in the first hour of storm. For the chosen wave regime an underwater profile close to the theoretical Dean’s equilibrium profile is formed after 6 h. The position of the underwater bar affects the shoreline retreat rate. The lowest shore retreat occurs when the bar crest is located at a distance equal to 0.70–0.82 of the deep-water wavelength, corresponding to the period of the wave spectrum peak. The maximal shoreline retreat occurs when the bar is located at a distance that is close to a half wavelength. The shoreline recession depends on the heights of low-frequency waves. The smaller the mean wave period and the higher low-frequency waves’ height near the coast, the smaller the retreat of the shoreline. The distance of seaward sediment transfer is directly proportional to the significant wave height near shore.

ACS Style

Olga Kuznetsova; Yana Saprykina. Influence of Underwater Bar Location on Cross-Shore Sediment Transport in the Coastal Zone. Journal of Marine Science and Engineering 2019, 7, 55 .

AMA Style

Olga Kuznetsova, Yana Saprykina. Influence of Underwater Bar Location on Cross-Shore Sediment Transport in the Coastal Zone. Journal of Marine Science and Engineering. 2019; 7 (3):55.

Chicago/Turabian Style

Olga Kuznetsova; Yana Saprykina. 2019. "Influence of Underwater Bar Location on Cross-Shore Sediment Transport in the Coastal Zone." Journal of Marine Science and Engineering 7, no. 3: 55.

Conference paper
Published: 17 January 2019 in Proceedings of EECE 2020
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The connections of Black Sea storminess activity with teleconnection patterns (climatic indexes) were performed on the base of visual wave observations (Voluntary Observing Ship) and WAM modelling. The annual maximal waves are more affected by AMO and PDO, but annual mean waves by NAO. It is shown that for qualitative analysis of climatic variability of waves on short- and middle-time periods, in general, one can use numerical simulation data even at one point of sea combining classical correlation analysis with wavelet analysis methods and parametric spectral analysis. In WAM modelling data, a long-term periodicity cannot be defined.

ACS Style

Yana Saprykina; Sergey Kuznetsov; Nikolay Valchev. Multidecadal Fluctuations of Storminess of Black Sea Due to Teleconnection Patterns on the Base of Modelling and Field Wave Data. Proceedings of EECE 2020 2019, 773 -781.

AMA Style

Yana Saprykina, Sergey Kuznetsov, Nikolay Valchev. Multidecadal Fluctuations of Storminess of Black Sea Due to Teleconnection Patterns on the Base of Modelling and Field Wave Data. Proceedings of EECE 2020. 2019; ():773-781.

Chicago/Turabian Style

Yana Saprykina; Sergey Kuznetsov; Nikolay Valchev. 2019. "Multidecadal Fluctuations of Storminess of Black Sea Due to Teleconnection Patterns on the Base of Modelling and Field Wave Data." Proceedings of EECE 2020 , no. : 773-781.

Journal article
Published: 01 November 2018 in Physical Oceanography
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ACS Style

D. V. Korzinin; Yana Saprykina. Influence of the Underwater Structures upon the Sediment Transport in the Coastal Zone. Physical Oceanography 2018, 25, 1 .

AMA Style

D. V. Korzinin, Yana Saprykina. Influence of the Underwater Structures upon the Sediment Transport in the Coastal Zone. Physical Oceanography. 2018; 25 (5):1.

Chicago/Turabian Style

D. V. Korzinin; Yana Saprykina. 2018. "Influence of the Underwater Structures upon the Sediment Transport in the Coastal Zone." Physical Oceanography 25, no. 5: 1.

Journal article
Published: 01 September 2018 in Physical Oceanography
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ACS Style

Ya. V. Saprykina; S. Yu. Kuznetsov. Methods of Analyzing Nonstationary Variability of the Black Sea Wave Climate. Physical Oceanography 2018, 25, 1 .

AMA Style

Ya. V. Saprykina, S. Yu. Kuznetsov. Methods of Analyzing Nonstationary Variability of the Black Sea Wave Climate. Physical Oceanography. 2018; 25 (4):1.

Chicago/Turabian Style

Ya. V. Saprykina; S. Yu. Kuznetsov. 2018. "Methods of Analyzing Nonstationary Variability of the Black Sea Wave Climate." Physical Oceanography 25, no. 4: 1.

Journal article
Published: 03 August 2018 in Energies
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An analysis of the variability of wave climate and energy within the Black Sea for the period 1960–2011 was made using field data from the Voluntary Observing Ship Program. Methods using wavelet analysis were applied. It was determined that the power flux of wave energy in the Black Sea fluctuates: the highest value is 4.2 kW/m, the lowest is 1.4 kW/m. Results indicate significant correlations among the fluctuations of the average annual wave heights, periods, the power flux of wave energy, and teleconnection patterns of the North Atlantic Oscillation (NAO), the Atlantic Multi-decadal Oscillation (AMO), the Pacific Decadal Oscillation (PDO) and the East Atlantic/West Russia (EA/WR). It was revealed that, in positive phases of long-term periods of AMO (50–60 years) as well as PDO, NAO, and AO (40 years), a decrease of wave energy was observed; however, an increase in wave energy was observed in the positive phase of a 15-year period of NAO and AO. The positive phase of changes of EA/WR for periods 50–60, 20–25, and 13 years led to an increase of wave energy. The approximation functions of the oscillations of the average annual wave heights, periods, and the power flux of wave energy for the Black Sea are proposed.

ACS Style

Yana Saprykina; Sergey Kuznetsov. Analysis of the Variability of Wave Energy Due to Climate Changes on the Example of the Black Sea. Energies 2018, 11, 2020 .

AMA Style

Yana Saprykina, Sergey Kuznetsov. Analysis of the Variability of Wave Energy Due to Climate Changes on the Example of the Black Sea. Energies. 2018; 11 (8):2020.

Chicago/Turabian Style

Yana Saprykina; Sergey Kuznetsov. 2018. "Analysis of the Variability of Wave Energy Due to Climate Changes on the Example of the Black Sea." Energies 11, no. 8: 2020.

Proceedings article
Published: 17 June 2018 in Volume 7B: Ocean Engineering
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We conducted experimental and theoretical studies on Benjamin-Feir (BF) instability and revealed a number of new features of the development of instability on the late stages of wave’s evolution. We employ the reduced (truncated) version of Zakharov equations — the multi-wave near-neighbor resonance model (NN model), which takes into account the most effective quasi-resonances with minimum detuning from exact resonance conditions. We show that near-neighbor model for wave interactions can adequately describe the number of new prominent features of BF instability observed in experiments and it is much simpler than Zakharov equation for computation and analysis. Numerical simulations of the full Zakharov equations confirm the main predictions obtained by the NN modeling and both reasonably correspond to the results of available physical experiments. Strong permanent downshifting of spectral maximum for gentle waves without wave breaking is revealed for twice as narrow side band spectral width in comparison with the most unstable case. Regime of multiple downshifting accompanied by wave breaking is discovered for steep waves. Discrete energy flow to higher spectral components takes a place in breaking and no breaking regimes. Results of numerical simulations of Zakharov and NN models reasonably correspond to each other and to our experimental and field observations on wave modulation.

ACS Style

Igor Shugan; Sergey Kuznetsov; Yana Saprykina; Yang-Yih Chen. Late Stages in the Development of Modulation Instability of Waves. Volume 7B: Ocean Engineering 2018, 1 .

AMA Style

Igor Shugan, Sergey Kuznetsov, Yana Saprykina, Yang-Yih Chen. Late Stages in the Development of Modulation Instability of Waves. Volume 7B: Ocean Engineering. 2018; ():1.

Chicago/Turabian Style

Igor Shugan; Sergey Kuznetsov; Yana Saprykina; Yang-Yih Chen. 2018. "Late Stages in the Development of Modulation Instability of Waves." Volume 7B: Ocean Engineering , no. : 1.

Conference paper
Published: 28 August 2017 in Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI)
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On the base of experimental data it was revealed that type of wave breaking depends on wave asymmetry against the vertical axis at wave breaking point. The asymmetry of waves is defined by spectral structure of waves: by the ratio between amplitudes of first and second nonlinear harmonics and by phase shift between them. The relative position of nonlinear harmonics is defined by a stage of nonlinear wave transformation and the direction of energy transfer between the first and second harmonics. The value of amplitude of the second nonlinear harmonic in comparing with first harmonic is significantly more in waves, breaking by spilling type, than in waves breaking by plunging type. The waves, breaking by plunging type, have the crest of second harmonic shifted forward to one of the first harmonic, so the waves have "saw-tooth" shape asymmetrical to vertical axis. In the waves, breaking by spilling type, the crests of harmonic coincides and these waves are symmetric against the vertical axis. It was found that limit height of breaking waves in empirical criteria depends on type of wave breaking, spectral peak period and a relation between wave energy of main and second nonlinear wave harmonics. It also depends on surf similarity parameter defining conditions of nonlinear wave transformations above inclined bottom.

ACS Style

Sergey Kuznetsov; Yana Saprykina; Boris Divinskiy. PHYSICAL INTERPRETATION OF WAVE BREAKING CRITERIA. Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) 2017, 1 .

AMA Style

Sergey Kuznetsov, Yana Saprykina, Boris Divinskiy. PHYSICAL INTERPRETATION OF WAVE BREAKING CRITERIA. Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI). 2017; ():1.

Chicago/Turabian Style

Sergey Kuznetsov; Yana Saprykina; Boris Divinskiy. 2017. "PHYSICAL INTERPRETATION OF WAVE BREAKING CRITERIA." Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) , no. : 1.

Conference paper
Published: 28 August 2017 in Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI)
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On the base of experimental data it was revealed that type of wave breaking depends on wave asymmetry against the vertical axis at wave breaking point. The asymmetry of waves is defined by spectral structure of waves: by the ratio between amplitudes of first and second nonlinear harmonics and by phase shift between them. The relative position of nonlinear harmonics is defined by a stage of nonlinear wave transformation and the direction of energy transfer between the first and second harmonics. The value of amplitude of the second nonlinear harmonic in comparing with first harmonic is significantly more in waves, breaking by spilling type, than in waves breaking by plunging type. The waves, breaking by plunging type, have the crest of second harmonic shifted forward to one of the first harmonic, so the waves have "saw-tooth" shape asymmetrical to vertical axis. In the waves, breaking by spilling type, the crests of harmonic coincides and these waves are symmetric against the vertical axis. It was found that limit height of breaking waves in empirical criteria depends on type of wave breaking, spectral peak period and a relation between wave energy of main and second nonlinear wave harmonics. It also depends on surf similarity parameter defining conditions of nonlinear wave transformations above inclined bottom.

ACS Style

Sergey Kuznetsov; Yana Saprykina; Boris Divinskiy. PHYSICAL INTERPRETATION OF WAVE BREAKING CRITERIA. Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) 2017, 1 -1.

AMA Style

Sergey Kuznetsov, Yana Saprykina, Boris Divinskiy. PHYSICAL INTERPRETATION OF WAVE BREAKING CRITERIA. Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI). 2017; ():1-1.

Chicago/Turabian Style

Sergey Kuznetsov; Yana Saprykina; Boris Divinskiy. 2017. "PHYSICAL INTERPRETATION OF WAVE BREAKING CRITERIA." Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) , no. : 1-1.

Journal article
Published: 23 June 2017 in Coastal Engineering Proceedings
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Based on experimental data, the problem of parametrization of spatial variation of the phase shift (biphase) between the first and second nonlinear harmonics of wave motion during wave transformation over sloping bottom in the coastal zone is discussed. It is revealed that the biphase values vary in the range [–π/2, π/2]. Biphase variations rigorously follow fluctuations in amplitudes of the first and second harmonics and the periodicity of energy exchange between them. The empirical relation applied in modern practice to calculate the biphase, which depends on the Ursell number, is incorrect for calculating the biphase for wave evolution in the coastal zone, because it does not take into account periodic energy exchange between the nonlinear harmonics. The new approximations of the biphase values for typical scenarios of wave transformations are suggested. It was demonstrated that the biphase of breaking waves defines breaking index and breaking type.

ACS Style

Yana Saprykina; Sergey Kuznetsov; Margarita Shtremel. PARAMETERIZATION OF EVOLUTION OF BIPHASE DURING NONLINEAR TRANSFORMATION OF WAVES IN COASTAL ZONE. Coastal Engineering Proceedings 2017, 1, 3 .

AMA Style

Yana Saprykina, Sergey Kuznetsov, Margarita Shtremel. PARAMETERIZATION OF EVOLUTION OF BIPHASE DURING NONLINEAR TRANSFORMATION OF WAVES IN COASTAL ZONE. Coastal Engineering Proceedings. 2017; 1 (35):3.

Chicago/Turabian Style

Yana Saprykina; Sergey Kuznetsov; Margarita Shtremel. 2017. "PARAMETERIZATION OF EVOLUTION OF BIPHASE DURING NONLINEAR TRANSFORMATION OF WAVES IN COASTAL ZONE." Coastal Engineering Proceedings 1, no. 35: 3.

Proceedings article
Published: 01 June 2017 in OCEANS 2017 - Aberdeen
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On the base of laboratory experiment the regularities of changes of the transformation coefficient and of mean wave period on the wave parameters and parameters of submerged bars of different permeability were obtained. The typical scenarios of cross-shore sediment transport above sloping bottom profile with submerged bar and assessments of the contribution of physical processes of wave transformation to cross-shore sediment transport were investigated.

ACS Style

Yana Saprykina; Dmitry Korzinin; Margarita Shtremel. Influence of nonlinear waves transformation above submerged structures on the sediment transport in the coastal zone. OCEANS 2017 - Aberdeen 2017, 1 -7.

AMA Style

Yana Saprykina, Dmitry Korzinin, Margarita Shtremel. Influence of nonlinear waves transformation above submerged structures on the sediment transport in the coastal zone. OCEANS 2017 - Aberdeen. 2017; ():1-7.

Chicago/Turabian Style

Yana Saprykina; Dmitry Korzinin; Margarita Shtremel. 2017. "Influence of nonlinear waves transformation above submerged structures on the sediment transport in the coastal zone." OCEANS 2017 - Aberdeen , no. : 1-7.