scholarly journals Mathematical model of the Late Pleistocene and Holocene transgressions of the Black Sea

2010 ◽  
Vol 225 (2) ◽  
pp. 180-190 ◽  
Author(s):  
N.V. Esin ◽  
V. Yanko-Hombach ◽  
O.N. Kukleva
Keyword(s):  
Mathematical Model ◽  
Late Pleistocene ◽  
Black Sea ◽  
The Black Sea

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.

scholarly journals Radiocarbon Chronology of Paleogeographic Events of the Late Pleistocene and Holocene in Russia

Radiocarbon ◽  
1993 ◽  
Vol 35 (3) ◽  
pp. 399-407 ◽  
Author(s):  
P. A. Kaplin ◽  
A. A. Svitoch ◽  
O. B. Parunin
Keyword(s):  
Late Pleistocene ◽  
Black Sea ◽  
Caspian Sea ◽  
The Black Sea ◽  
Eastern Region ◽  
Western Kamchatka ◽  
Radiocarbon Chronology ◽  
Far Eastern

14C chronology of Late Pleistocene paleogeographical events in the Black Sea–Caspian Sea region shows that the following transgressions partly correlate with each other: Karangat and Khazarian; Neo-Euxinian and Khvalyn; Holocene and Neo-Caspian. The main climatic events were synchronous in intercontinental Siberia. In the far eastern region, the Middle-Wisconsinan transgression is reflected by Chukotka and western Kamchatka terraces and by submerged ancient shorelines in Primorye.

scholarly journals ЕФЕКТИВНІСТЬ ЕНЕРГОТЕХНОЛОГІЧНОЇ УСТАНОВКИ ЩОДО ВИДОБУВАННЯ СІРКОВОДНЮ З ГЛИБИН ЧОРНОГО МОРЯ

2019 ◽  
pp. 50-57
Author(s):  
Михайло Романович Ткач ◽  
Борис Георгійович Тимошевський ◽  
Аркадій Юрійович Проскурін ◽  
Юрій Миколайович Галинкін
Keyword(s):  
Mathematical Model ◽  
Hydrogen Sulfide ◽  
Black Sea ◽  
Control Valve ◽  
Operational Reliability ◽  
Gas Content ◽  
The Black Sea ◽  
Depth Range ◽  
Gaseous State ◽  
Pressure Hydrogen

The article discusses a promising energy-technology unit for the extraction of hydrogen sulfide from the deep waters of the Black Sea, which provides for raising the gas-liquid mixture from the depths by the gas-lift method using wave pulses to separate hydrogen sulfide in the gaseous state. The installation includes a supply line, which is lowered to the required depth, a supply pump, a coalescing separator, a seawater discharge line with a reduced concentration of hydrogen sulfide, a control valve, a hydrodynamic generator of mechanical vibrations, a lifting pipeline, a high pressure hydrogen sulfide separator, a hydraulic turbine, a low pressure hydrogen sulfide separator, seawater discharge pipe and hydrogen sulfide expander. This unit will improve the energy efficiency and operational reliability of the process of hydrogen sulfide production, as well as reduce the burden on the Black Sea environment. A mathematical model of this setup has been developed. The results obtained by the mathematical model adequately coincide with the known experimental ones. This suggests that it is possible to use the model to determine the parameters of the process for the extraction of hydrogen sulfide from the Black Sea. The parameters of the process for the extraction of hydrogen sulfide from the Black Sea in the depth range of the pipeline 0...1000 m at a temperature of 280...285 K. It has been established that increasing the gas content of seawater from 0 to 2.5 m3/m3 leads to a decrease in the pressure value by 2.2 MPa. A further increase in seawater gas content from 2.5 to 5.0 m3/m3 is accompanied by a decrease in pressure of another 1.6 MPa. Such a significant decrease in pressure at the inlet to the riser piping allows hydrogen sulfide and seawater to be obtained at a pressure that is substantially greater than atmospheric. The excess pressure at the outlet of the lifting pipeline is determined based on data obtained by the method of "equivalent length". When the seawater gas content is 2.5 m3/m3, the pipeline’s immersion depth is 250...1000 m, the value of the overpressure of substances at the exit of the lifting pipeline will be 0.2...0.45 MPa, and at 5 m3/m3 – 0.67...1.07 MPa, at 7.5 m3/m3 – 0.83...1.4 MPa and at 10 m3/m3 – 0.97...1.68 MPa.

Morphology and Late Pleistocene-Holocene Sedimentation of the Strait of İstanbul (Bosphorus): A review

2021 ◽  
pp. SP523-2021-48
Author(s):  
M. Namık Çağatay ◽  
K. Kadir Eriş ◽  
Zeynep Erdem
Keyword(s):  
Late Pleistocene ◽  
Black Sea ◽  
Aegean Sea ◽  
The Black Sea ◽  
Sea Of Marmara ◽  
Submarine Fan ◽  
Sedimentary Succession ◽  
Muddy Sediments ◽  
Lacustrine Facies ◽  
Irregular Topography

AbstractThe Bosphorus (Istanbul Strait) is natural strait that connects the Black Sea with the Aegean Sea via the Sea of Marmara and Dardanelles Strait. It is a 31 km long and 3.5 km wide winding channel, with an irregular bottom morphology. It has depressions up to -110 m deep, and two sills with depths of -35 and -58 m in the south and north, respectively.Presently, a two-layer water exchange exists through the strait, with the Mediterranean and Black Sea waters forming the lower and upper layers, respectively. The Bosphorus channel extends as shelf valleys on the Black Sea and Sea of Marmara shelves. However, it operated as a river valley or an estuary during the stadial low-stand periods.The infill sedimentary succession of the Bosphorus channel is up to ∼100 m thick above the Palaeozoic-Cretaceous basement with an irregular topography. The oldest sediments are sandy to muddy fluvial-lacustrine facies of late Pleistocene age, which are preserved only in up to -160 m-deep scoured depressions of the basement. They are overlain by mid-late Holocene estuarine-marine shelly sandy to muddy sediments with patches of bioherms and shelly lag deposits.The Bosphorus outlet areas of the Black Sea and Sea of Marmara are characterized by a submarine fan and a shelf valley, respectively. The fan system in the Black Sea started depositing ∼900 yr after the initial vigorous marine water incursion at ∼8.4 14C kyr BP. On the Marmara shelf, extension of the Bosphorus channel is a sinuous shelf valley with a channel-leveé complex, which was deposited by the Black Sea outflow during the 11-10 14C kyr BP. Catastrophic floodings of the Sea of Marmara by torrential Black Sea outflows during the Greenland Interstadial melt water pulses, as well as the strong Mediterranean current towards the Black Sea during the interglacial periods, were responsible for carving the Bosphorus channel and the shelf valleys, as well as removing the sediments belonging to the earlier periods.

Main regularities of the Late Pleistocene-Holocene transgression of the Black Sea

2010 ◽  
Vol 430 (2) ◽  
pp. 194-197 ◽  
Author(s):  
N. V. Esin ◽  
V. Yanko-Hombach ◽  
O. N. Kukleva ◽  
N. I. Esin
Keyword(s):  
Late Pleistocene ◽  
Black Sea ◽  
The Black Sea ◽  
Holocene Transgression
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