scholarly journals Effects of methane outgassing on the Black Sea atmosphere

2006 ◽  
Vol 6 (3) ◽  
pp. 3611-3626 ◽  
Author(s):  
K. Kourtidis ◽  
I. Kioutsioukis ◽  
S. Rapsomanikis
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Danube Delta ◽  
Substantial Impact ◽  
Mixing Ratios ◽  
The Crimea ◽  
Methane Fluxes ◽  
Very High ◽  
Detector Saturation ◽  
Methane Concentrations

Abstract. Methane in air and seawater was measured in the Eastern Black Sea during the 10–18 December 1999 BIGBLACK project cruise. The measurements allowed for the calculation of supersaturation ratios and methane fluxes across the air-sea interface. CH4 mixing ratios in air were generally in the 1.8–2.0 ppmv range, while surface (4 m depth) seawater concentrations varied from 5 to 100 ppmv. Above active seep areas, the water was supersaturated at around 500% with respect to the overlying atmosphere. Accordingly, flux densities varied greatly and were up to 4000 umol m-2 day-1. In the Sevastopol harbour, supersaturations up to around 3000%, similar to those at the Danube Delta, were observed, while in the Istanbul harbour supersaturations could not be determined because the very high values of water concentrations have led to detector saturation. Simple modelling shows that the observed fluxes do not have any substantial impact in the methane content of the Black Sea atmosphere, as they could only raise its concentrations by less than 1 ppb. On the other hand, calculations performed as part of the CRIMEA project, show that mud volcano eruptions could episodically raise the methane concentrations well above their regional background for several tens of kilometres downwind.

scholarly journals Effects of methane outgassing on the Black Sea atmosphere

2006 ◽  
Vol 6 (12) ◽  
pp. 5173-5182 ◽  
Author(s):  
K. Kourtidis ◽  
I. Kioutsioukis ◽  
D. F. McGinnis ◽  
S. Rapsomanikis
Keyword(s):  
Black Sea ◽  
Mud Volcano ◽  
The Black Sea ◽  
Substantial Impact ◽  
Mixing Ratios ◽  
The Crimea ◽  
Methane Fluxes ◽  
Very High ◽  
Detector Saturation ◽  
Methane Concentrations

Abstract. Methane in air and seawater was measured in the Eastern Black Sea during the 10–18 December 1999 BIGBLACK project cruise. The measurements allowed for the calculation of supersaturation ratios and methane fluxes across the air-sea interface. CH4 mixing ratios in air were generally in the 1.8–2.0 ppmv range, while surface (4 m depth) seawater concentrations varied from 4 to 93 ppmv. Above active seep areas, the water was supersaturated to around 500% with respect to the overlying atmosphere. Accordingly, flux densities varied greatly and were up to 3300 umol m−2 day−1. In the Sevastopol harbour, supersaturations up to around 3000%, similar to those at the Danube Delta, were observed, while in the Istanbul harbour supersaturations could not be determined because the very high values of water concentrations led to detector saturation. Simple modelling shows that the observed fluxes do not have any substantial impact on the methane content of the Black Sea atmosphere, as they would only raise its concentrations by less than 50 ppt. On the other hand, calculations performed as part of the CRIMEA project show that mud volcano eruptions could episodically raise the methane concentrations well above their regional background for several tens of kilometres downwind. These calculations, which also apply to mud volcano eruptions elsewhere on the globe, indicate that the spatial extend and the magnitude of the atmospheric perturbation is such that its observation might lie within the capabilities of existing satellite instrumentation such as SCIAMACHY on ENVISAT.

scholarly journals The Black Sea Trout, Salmo labrax Pallas, 1814 (Pisces: Salmonidae) in Romanian Waters

2020 ◽  
Vol 77 (2) ◽  
pp. 9
Author(s):  
Călin LAȚIU ◽  
Daniel COCAN ◽  
Paul UIUIU ◽  
Andrada IHUȚ ◽  
Sabin Alexandru NICULA ◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Danube Delta ◽  
Meristic Characters ◽  
Sea Trout ◽  
Research Fields ◽  
New Information ◽  
Rivers And Lakes ◽  
Recorded Data ◽  
New Hypothesis

The review assembles chronological data on Black Sea trout (Salmo labrax) from Romanian waters and brings up-to-date information related to the distribution of the species. The information used dates from 1909 to 2020 and includes books, articles, digital databases, field observations, and notes from different research fields such as ichthyology, biogeography, genetics, aquaculture, conservation, and ecology. Global distribution, migration, meristic characters, and aquaculture of the species were analyzed based on the recorded data from the specialty literature. New information related to a possible population of Salmo labrax inside the Carpathian Arch was discussed. In Romanian waters the species is found in the Black Sea, Danube, Danube Delta but the current paper proposes a new hypothesis, namely that resident populations can be found in rivers and lakes adjacent to the Carpathian Arch. The highest migration point of the Black Sea trout in the Danube was recorded near Corabia locality, Olt County, (43°46′25″N- 24°30′12″E). In the Danube Delta, it was caught in all the three branches (Sulina, Sf. Gheorghe and Chilia), and lagoonary complexes such as Razim-Sinoe. Sexually matured females were caught especially in Spring Season while unmatured specimens were caught in all seasons. Even if the species is protected under Romanian legislation, fishermen and anglers should report its presence when caught accidentally.

scholarly journals Geographical variability of length-age structure of the Black Sea sprat Sprattus sprattus phalericus (Risso) (Pisces: Clupeidae) and intraspecific differentiation

2016 ◽  
Vol 1 (1) ◽  
pp. 24-35
Author(s):  
G. V. Zuyev ◽  
V. A. Bondarev ◽  
Yu. V. Samotoi
Keyword(s):  
Interannual Variability ◽  
Black Sea ◽  
Age Structure ◽  
The Black Sea ◽  
Population Parameter ◽  
Intraspecific Differentiation ◽  
Geographical Regions ◽  
The Crimea ◽  
Scientific Technical

Investigations of the Black Sea sprat intraspecific differentiation are the basis for the scientific substantiation of rational exploitation of its resource potential. This work is devoted to the study of spatial variability of length and age structure of sprat as specific population parameter reflecting its intraspecific differentiation. Our own data and materials of Scientific, Technical and Economic Committee for Fisheries (STECF) of the European Commission have been used. The first time long-term dynamics (2007–2012) and interannual variability of length and age structure of sprat in different geographical regions of the Black Sea (coastal waters of Bulgaria – Romania, Turkey and the Crimea) have been investigated. Differences of the long-term dynamics and interannual variability of length and age structure in these regions have been found. Sprat population from Bulgaria – Romania region is in better conditions (mean length 8.59 ± 0.01 cm; mean age 1.79  year), sprat population from Crimea region is in worse conditions (mean length 7.64 ± 0.01 cm; mean age 1.38 year). It has been shown that the main factor determining the interregional biological heterogeneity of sprat is the different fishery regulations. This fact disagrees with concept of united commercial sprat stock in the Black Sea.

Architecture of One-Apsidal Churches of North Black Sea Coast VI-XII c.

2018 ◽  
Vol 931 ◽  
pp. 790-796
Author(s):  
Viktoria V. Pishchulina
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Byzantine Empire ◽  
Black Sea Region ◽  
The North ◽  
Black Sea Coast ◽  
The Crimea ◽  
The One ◽  
Sea Coast

A one-apsidal hall church is always a reflection of so-called “vulgar” Christianity, thus revealing the important peculiarities of the spatial culture of the region where it is erected. In this region we can mark two periods when such temples were built: VI-VII c. and X-XII c. The first period is associated with the missionary activity by Byzantine Empire, Antioch, Caucasian Albania which was conditioned by both geopolitical interests (Byzantian Empire, Antioch) and the shift of The Great Silk Way to the north (Caucasian Albania). The second, as the research has shown, is connected with the migration of the peoples of Abkhazia, the abzakhs to this territory in the XII-XIII c. and the development of contacts with the Crimea. In the North Black Sea Region the one-apsidal hall church appears as early as in the VI c. – in the territory of Abkhazia we know about ten such temples. The temples of this type in the area of Big Sochi are dated back to the VII-VIII c. In the first Abhzaian temples we can reveal the influence of denominational centers – Byzantian Empire, Antioch, Caucasian Albania. In the temples of the Black Sea coast of both periods – introduction of the samples from Abkhazia.

scholarly journals Black Sea coastal forecasting system

Ocean Science ◽  
2012 ◽  
Vol 8 (2) ◽  
pp. 183-196 ◽  
Author(s):  
A. I. Kubryakov ◽  
G. K. Korotaev ◽  
V. L. Dorofeev ◽  
Y. B. Ratner ◽  
A. Palazov ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Black Sea ◽  
Ecosystem Model ◽  
The Black Sea ◽  
Western Basin ◽  
The North ◽  
North Eastern ◽  
The Crimea ◽  
Forecasting System ◽  
System Project

Abstract. The Black Sea coastal nowcasting and forecasting system was built within the framework of EU FP6 ECOOP (European COastalshelf sea OPerational observing and forecasting system) project for five regions: the south-western basin along the coasts of Bulgaria and Turkey, the north-western shelf along the Romanian and Ukrainian coasts, coastal zone around of the Crimea peninsula, the north-eastern Russian coastal zone and the coastal zone of Georgia. The system operates in the real-time mode during the ECOOP project and afterwards. The forecasts include temperature, salinity and current velocity fields. Ecosystem model operates in the off-line mode near the Crimea coast.

The Baron de Baye's Antiquities from North-east Russia and Siberia

1923 ◽  
Vol 3 (1) ◽  
pp. 52-60
Author(s):  
Ellis H. Minns
Keyword(s):  
Eighteenth Century ◽  
Black Sea ◽  
The Black Sea ◽  
North East ◽  
Black Sea Coast ◽  
East Russia ◽  
The Crimea ◽  
Northern Russia ◽  
Sea Coast ◽  
West European

The archaeology of the Black Sea coast quickly attracted attention when the Russians conquered the Crimea at the end of the eighteenth century, and the Scythic barrows of the Steppes began to be carefully excavated almost as soon; but it was not till the fifties and sixties that the less imposing antiquities of northern Russia found any one to study them even among Russians. West European interest naturally came later, the pioneers were first the Finn Aspelin in the seventies and next the Baron de Baye, who about 1890 sought to throw light from the East upon the Merovingian and other Teutonic styles which were his special province.

Development of a Web-based GIS monitoring and environmental assessment system for the Black Sea: application in the Danube Delta area

2016 ◽  
Vol 188 (8) ◽  
Author(s):  
Ilias N. Tziavos ◽  
Thomas K. Alexandridis ◽  
Borys Aleksandrov ◽  
Agamemnon Andrianopoulos ◽  
Ioannis D. Doukas ◽  
...  
Keyword(s):  
Black Sea ◽  
Environmental Assessment ◽  
Assessment System ◽  
The Black Sea ◽  
Danube Delta ◽  
Web Based ◽  
Delta Area

Trapezus in the Crimea: A Re-examination of the Sources*

2011 ◽  
Vol 17 (1) ◽  
pp. 125-133
Author(s):  
Pantelis Charalampakis
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Taman Peninsula ◽  
Satisfactory Solution ◽  
Archaeological Evidence ◽  
The Crimea ◽  
Written Sources

Abstract The author examines the question of the place name Trapezus recorded by ancient sources as being located north of the Black Sea. This toponym indicates a mountain which bears no relation to the Pontic city of Trapezus. According to the written sources only, this place name cannot be identified. On the contrary, as suggested by archaeological evidence and the testimony of Procopius about the Goths Trapezitae, the predominant opinion of Chatÿr Dag appears to provide the most satisfactory solution for the identification of Mount Trapezus. This mountain was never known as Hermonassa and is not related to the Taman peninsula.

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