Intensive Internal Waves with Anomalous Heights in the Black Sea Shelf Area

2019 ◽  
Vol 55 (1) ◽  
pp. 99-109 ◽  
Author(s):  
V. G. Bondur ◽  
A. N. Serebryany ◽  
V. V. Zamshin ◽  
L. L. Tarasov ◽  
E. E. Khimchenko
Keyword(s):  
Internal Waves ◽  
Black Sea ◽  
The Black Sea ◽  
Shelf Area

scholarly journals Intensive internal waves having anomalous heights in the Black Sea shelf area

2019 ◽  
Vol 55 (1) ◽  
pp. 114-127
Author(s):  
V. G. Bondur ◽  
A. N. Serebryany ◽  
V. V. Zamshin ◽  
L. L. Tarasov ◽  
E. E. Khimchenko
Keyword(s):  
Internal Waves ◽  
Black Sea ◽  
The Black Sea ◽  
Shelf Area

Приведены результаты исследования цуга аномально больших для Черного моря внутренних волн с высотами ~16 м и длинами 101–131 м. Измерения проводились в акватории вблизи г. Геленджик с помощью буксируемого акустического доплеровского профилометра течений (ADCP), гидрологического мини-зонда «RBR concerto», заякоренной термисторной цепочки, а также путем пространственного спектрального анализа космического радиолокационного изображения, полученного во время проведения подспутниковых измерений. Зарегистрированные внутренние волны имели нелинейный характер (солитоноподобная форма волновых профилей, дисперсия амплитуд, изменяющееся расстояние между гребнями и др.). Вертикальные компоненты скоростей орбитальных течений во внутренних волнах достигали 0.20 м/с. По пространственным спектрам космического радиолокационного изображения зарегистрированы квазимонохроматические спектральные максимумы, обусловленные поверхностными проявлениями внутренних волн с длинами, соответствующими измеренным по данным ADCP. Источником генерации этого аномального по высоте цуга внутренних волн являлись атмосферный фронт и связанная с ним область пониженного давления.

Field studies of variation scales of gravitational capillary waves and near-water wind in the Black Sea shelf area

2010 ◽  
Vol 46 (2) ◽  
pp. 232-238 ◽  
Author(s):  
V. V. Bakhanov ◽  
N. A. Bogatov ◽  
A. S. Volkov ◽  
A. V. Ermoshkin ◽  
E. M. Zuykova ◽  
...  
Keyword(s):  
Black Sea ◽  
Field Studies ◽  
Capillary Waves ◽  
The Black Sea ◽  
Shelf Area

Internal solitons on the Black Sea shelf: observation of waves of record amplitudes

2020 ◽  
Author(s):  
Andrey Serebryany ◽  
Valeriy Bondur ◽  
Viktor Zamshin
Keyword(s):  
Internal Waves ◽  
Black Sea ◽  
Satellite Images ◽  
Vertical Component ◽  
The Black Sea ◽  
Fish Food ◽  
Radar Images ◽  
Rfbr Grant ◽  
Satellite Radar ◽  
First Time

<p>When conducting work in the fall of 2015 on the Black Sea northeast shelf, we recorded internal waves, the unusualness of which attracts special attention for the following reasons. For the first time in 40 years of internal waves observations in the Black Sea, such high waves with amplitudes of 14–16 m were measured. The generation of these anomalous waves was connected with a cold atmospheric front passing over the sea. It was the first experimental evidence in the sea of such mechanism for internal waves generation. The observed internal waves had a clear seen character of nonlinear soliton-like waves.</p><p>We met the train of internal solitons during a sub-satellite survey conducted in the sea from a motor yacht equipped with ADCP “Rio Grande 600 kHz” in the waters near Cape Tolsty. The train was found at a point of the sea with a depth of 33 m and then was recorded on seven multidirectional tacks oriented normal to the coast. It moved across the shelf to the coast along the bottom thermocline, while the bottom currents accompanying it had a northwestern coastal orientation. The train included four waves of a soliton-like shape with sharpened crests and flattened troughs. Their lengths were 100-110 m, heights up to 14-16 m, vertical velocities in orbital currents reached 0.15-0.20 m/s. Another property of nonlinear waves was also expressed - the amplitude ranking of waves in the train. Traced on successive tacks for 2.5 hours, internal waves had preserved the soliton-like shape and as well the strong vertical component in their orbital currents. Despite the fact that the train was moving along the bottom thermocline, the effect of internal waves was sufficient to appear on satellite radar images of the sea surface of the study area. The performed processing of satellite images confirmed the wave parameters measured by contact methods.  An interesting fact of a long accompaniment of internal solitons by a school of fish was discovered. Fishes were concentrated in areas where internal waves carried the components of fish food supply to the surface from the bottom layers. The work was partially supported by RFBR grant 19- 05-00715.</p>

ESTIMATE OF DEPENDENCE OF THE VERTICAL TRBULENT DIFFUSION COEFFICIENT FROM BUOYANCY FREQUENCY FOR COASTAL ZONE OF THE BLACK SEA

2017 ◽  
Author(s):  
Lubov Globina ◽  
Lubov Globina
Keyword(s):  
Diffusion Coefficient ◽  
Active Layer ◽  
Black Sea ◽  
Eddy Diffusivity ◽  
The Black Sea ◽  
Small Scale ◽  
Buoyancy Frequency ◽  
Shelf Area ◽  
Turbulent Diffusion Coefficient ◽  
Horizontal Convection

The article highlights the most important studies of oceanographic processes, such as horizontal convection, winter cascading on the shelf and continental slope, the processes in the bottom of the Black Sea. The results of the study of small-scale structure of the shelf upper active layer of the Black Sea in 2014 are discussed. The new information about the distribution of the eddy diffusivity with depth in the coastal part of the Heracleian peninsula is given. The investigated dependence vertical turbulent diffusion coefficient from buoyancy frequency at the active layer is found to be has a quadratic character for the entire shelf area and doesn’t depend on the stratification.

Internal waves in the Black Sea: satellite observations and in-situ measurements

2014 ◽  
Author(s):  
Olga Yu. Lavrova ◽  
Marina I. Mityagina ◽  
Andrey N. Serebryany ◽  
Konstantin D. Sabinin ◽  
Nina A. Kalashnikova ◽  
...  
Keyword(s):  
Internal Waves ◽  
Black Sea ◽  
In Situ Measurements ◽  
Satellite Observations ◽  
The Black Sea

scholarly journals Comment on “Holocene sedimentation in the southwestern Black Sea: Interplay between riverine supply, coastal eddies of the Rim Current, surface and internal waves, and saline underflow through the Strait of Bosphorus” by O. Ankindinova, A. E. Aksu, R. N. Hiscott [Marine Geology, 420 (2020) 106092]

2020 ◽  
Vol 81 (2) ◽  
pp. 77-88
Author(s):  
Ivan Genov
Keyword(s):  
Phase Change ◽  
Internal Waves ◽  
Black Sea ◽  
The Black Sea ◽  
Marine Geology ◽  
86Sr Ratio ◽  
Ocean Water ◽  
Principle Of Superposition ◽  
The Holocene ◽  
The Stability

Ankindinova et al. (2020) describe a series of hydrological events that have led to sedimentation and stratigraphic variations in the gradual sinking of the Black Sea shelf during the Holocene. A key aspect of the study is the attempt to provide a reliable stratigraphic basis for proving of a transgression in the basin throughout the Holocene. However, the conclusions of this approach run counter to the stratigraphic rules: redeposition and significant hiatus in the transgressive phase change of depth of sediment core location (M05-03P) – principle of superposition; merging of transgressive and regressive deposits into a common stratigraphic unit (contradicts the sequential stratigraphy). For this reason, the stability of the conclusion of Ankindinova et al. (2020) for the totally transgressive Holocene development of the Black Sea is doubtful. In addition, the study is based on the interpretation that the increase in the 87Sr /86Sr ratio is solely dependent on ocean water inflow, which is not always correct for enclosed and semi-enclosed basins.

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