scholarly journals Influence of Dardanelles outflow induced thermal fronts and winds on drifter trajectories in the Aegean Sea

2014 ◽  
Vol 15 (2) ◽  
pp. 239 ◽  
Author(s):  
R. GERIN ◽  
V. KOURAFALOU ◽  
P.-M. POULAIN ◽  
Ş. BESIKTEPE
Keyword(s):  
Black Sea ◽  
General Circulation ◽  
Aegean Sea ◽  
The Black Sea ◽  
Data Set ◽  
Strong Connectivity ◽  
Surface Circulation ◽  
Circulation Patterns ◽  
Modelling Studies

The data provided by 12 drifters deployed in the Northern Aegean Sea in the vicinity of the Dardanelles Strait in August 2008 and February 2009 are used to explore the surface circulation of the basin and the connectivity to the Black Sea. The drifters were deployed within the Dardanelles outflow of waters of Black Sea origin in the Northeastern Aegean. Thanks to the particular choice of the drifter deployment positions, the data set provides a unique opportunity to observe the branching behaviour of the surface currents around Lemnos Island. Such pathways were notpossible to study with previous drifter deployments that were far from the Dardanelles Strait. In addition, the drifter tracks covered the Aegean basin quite thoroughly, mapping major circulation features and supporting the overall general circulation patterns described by previous observational and modelling studies. The collected data display cases in which drifters are driven by winds and thermal fronts. Wind products were used to estimate the influence of the atmospheric forcing on the drifter trajectories. Satellite sea surface temperature images were connected to the drifter tracks, demonstrating a high correlation between the remote and in situ observations. The waters of Black Sea origin were traced all the way to the Southern Aegean, establishing a strong connectivity link between the Aegean and Black Sea basins.

scholarly journals An Evaluation of the Main Physical Features and Circulation Patterns in the Black Sea Basin

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Alina GIRLEANU ◽  
Eugen RUSU
Keyword(s):  
Black Sea ◽  
Warming Trend ◽  
Mitigation Measures ◽  
The Black Sea ◽  
Climate Change Projections ◽  
Black Sea Region ◽  
Circulation Patterns ◽  
General Physical ◽  
Physical Features

Having as target the semi-enclosed basin of the Black Sea, the main purpose of the present paper is to provide an overview of its general physical features and circulation patterns. In order to achieve this goal, more than five decades of data analysis – from  1960 to 2015 – were taken into consideration and the results were checked against known data, both from satellite data over the last two decades and in-situ measurements from earlier decades. The circulation of the Black Sea basin has been studied for almost 400 years, since the Italian Count Luigi Marsigli first described the ‘two layer’ circulation through the Bosphorus Strait in the year 1681. Since climate change projections for the Black Sea region foresee significant impact on the environment in the coming decades, a set of adaptation and mitigation measures is required, therefore more research is needed. Nowadays, the warming trend adds a sense of immediate urgency because according to the National Oceanic and Atmospheric Administration’s National Centre for Environmental Information, July 2020 was the second-hottest month ever recorded for the planet. Its averaged land and ocean surface temperature tied with July 2016 as the second-highest for the month in the 141-year NOAA’s global temperature dataset record, which dates back to 1880. It was 0.92°C above the 20th-century average of 15.8°C, with only 0.01°C less than the record extreme value measured in July of 2019.

The new online Black Sea Oceanographic Database

2020 ◽  
Author(s):  
Elena Zhuk ◽  
Maxim Vecalo ◽  
Andrey Ingerov
Keyword(s):  
Black Sea ◽  
High Performance ◽  
Data Access ◽  
The Black Sea ◽  
Data Types ◽  
Marine Hydrophysical Institute ◽  
Online Data ◽  
Data Set ◽  
Data Archiving

<p><strong>The new online Black Sea Oceanographic Database </strong></p><p>Elena.V. Zhuk</p><p> Marine Hydrophysical Institute, Russian Academy of Science, Russia</p><p>[email protected]</p><p> </p><p>The new improvements of the Black Sea Oceanographic Database (BSOD) dedicated to the online access of the hydrological and hydro-chemical data, taking into account users priorities, data types, methods and time of data access are presented.</p><p>According to the results of the free DBMS analysis, the PostgreSQL object-relational DBMS was selected for archiving the data in the BSOD. PostgreSQL provides high performance and reliability and the ability to work with a big data. Moreover, the PostgreSQL has the functions allowing to work with GIS objects, using the PostGIS extension and has built-in support for poorly structured data in JSON format. For the development provided the capability to select   large data set in accordance with the criteria specified by metadata selection. Taking these two features into account, the part of the database responsible for accessing the metadata, was designed for interactive transaction processing (OLTP access template), while the other part, responsible for the in-situ data archiving was developed in accordance with the “star” architecture, which is typical for the OLAP access template.</p><p>After analyzing the oceanographic in-situ observations, the following main entities were identified: Cruise, Ship, Station, Measurements, as well as Measured parameters and the relationships between them. A set of attributes was compiled for each of the entities and the tables were designed. The BSOD includes the following:</p><p>- <strong>Metadata</strong><strong> tables : </strong>Cruises, ships, stations, stations_parameters.</p><p>- <strong>Data</strong><strong> tables</strong>: measurements.</p><p>-<strong>Vocabularies: </strong>vocabularies were constructed using the SeaDataCloud BODC vocabularies parameters.</p><p>-<strong>Referencedata tables</strong>: GEBCO, EDMO, p01_vocabuary, p02_vocabuary, p06_vocabuary, l05_vocabuary.</p><p>To provide the online data access to the Black Sea Oceanographic Database, a  User Interface-UI was implemented. It was developed using jQuery and mapBox GL javascript libraries and provides visual data selection for date period, cruises, parameters such as temperature, salinity, oxygen, nitrates, nitrites, phosphates and other metadata.</p><p><strong>Acknowledgements:</strong> the work was carried out in the framework of the Marine Hydrophysical Institute of the Russian Academy of Science  task No. 0827-2018-0002.</p><p><strong>Keywords:</strong> Black Sea, oceanographic database,  PostgreSQL, online data access, Geo-information system.</p>

scholarly journals The MEDESS-GIB database: tracking the Atlantic water inflow

2016 ◽  
Vol 8 (1) ◽  
pp. 141-149 ◽  
Author(s):  
Marcos García Sotillo ◽  
Emilio Garcia-Ladona ◽  
Alejandro Orfila ◽  
Pablo Rodríguez-Rubio ◽  
José Cristobal Maraver ◽  
...  
Keyword(s):  
Environmental Science ◽  
Atlantic Water ◽  
Surface Currents ◽  
Strait Of Gibraltar ◽  
Data Set ◽  
Surface Circulation ◽  
Circulation Patterns ◽  
Spatial Coverage ◽  
Code Type

Abstract. On 9 September 2014, an intensive drifter deployment was carried out in the Strait of Gibraltar. In the frame of the MEDESS-4MS Project (EU MED Program), the MEDESS-GIB experiment consisted of the deployment of 35 satellite tracked drifters, mostly of CODE-type, equipped with temperature sensor sampling at a rate of 30 min. Drifters were distributed along and on both sides of the Strait of Gibraltar. The MEDESS-GIB deployment plan was designed as to ensure quasi-synoptic spatial coverage. To this end, four boats covering an area of about 680 NM2 in 6 h were coordinated. As far as these authors know, this experiment is the most important exercise in the area in terms of number of drifters released. Collected satellite-tracked data along drifter trajectories have been quality controlled and processed to build the presented MEDESS-GIB database. This paper reports the MEDESS-GIB data set that comprises drifter trajectories, derived surface currents and in situ SST measurements collected along the buoys tracks. This series of data is available through the PANGAEA (Data Publisher for Earth and Environmental Science) repository, with the following doi:10.1594/PANGAEA.853701. Likewise, the MEDESS-GIB data will be incorporated as part of the Copernicus Marine historical products. The MEDESS-GIB data set provides a complete Lagrangian view of the surface inflow of Atlantic waters through the Strait of Gibraltar and thus, very useful data for further studies on the surface circulation patterns in the Alboran Sea, and their links with one of the most energetic Mediterranean Sea flows: the Algerian Current.

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.

A voyage to Ancient Greek Harbours on board Limenoscope

2007 ◽  
Vol 7 (1) ◽  
pp. 253-260 ◽  
Author(s):  
T. Theodoulou ◽  
C. Memos
Keyword(s):  
Black Sea ◽  
General Public ◽  
Aegean Sea ◽  
Relevant Information ◽  
The Black Sea ◽  
Ancient Greek ◽  
Web Based ◽  
Database Structure ◽  
Historical Role ◽  
Concise Information

Limenoscope is a web based database aiming at promoting the cultural heritage regarding ancient Greek harbours and disseminate the relevant information equally to the general public and to researchers with an interest in that particular cognitive field. The scope of the project is the realization of a database, where one can search for concise information relevant to the historical role, the topography, the morphology, as well as the technical works and installations of ancient harbours in the Mediterranean and the Black Sea. The Database started off with the registration of harbours located in the Aegean Sea and Cyprus, dating from Archaic to Byzantine times. Special emphasis is laid on the bibliographical update of the data forms of the harbour sites, as well as on the related references in ancient literature. The database enables the locating of these sites on a general map, where photographs, plans etc. are also archived. The principles of the database structure are briefly presented along with an example, that of the harbour of Phalasarna, among the harbours registered therein.

scholarly journals A study of long-term changes in Black Sea ecosystems based on data assimilation of remote measurements in a numerical model

2019 ◽  
Vol 46 (1) ◽  
pp. 58-69
Author(s):  
V. L. Dorofeev ◽  
L. I. Sukhikh
Keyword(s):  
Black Sea ◽  
Marine Ecosystem ◽  
Three Dimensional ◽  
The Black Sea ◽  
Regular Grid ◽  
Remote Measurements ◽  
Biogeochemical Parameters ◽  
Color Scanner

Herein, we present a simulation of the dynamics of Black Sea ecosystems using a three-dimensional interdisciplinary model that assimilates satellite color scanner measurements. Calculations were performed for the fifteen years from 1998 and a set of 3-d biogeochemical fields of the Black Sea were generated on a regular grid with a discreteness time of 1 day. Analyses of core biogeochemical parameters of the marine ecosystem were then performed. The qualities of received fields were evaluated using comparisons with existing data from in situ measurements.

scholarly journals Ecological interrelations of Rapana venosa (Gastropoda: Muricidae) with ichthyofauna in the Black Sea

2016 ◽  
Vol 1 (4) ◽  
pp. 76-77
Author(s):  
I. P. Bondarev
Keyword(s):  
Black Sea ◽  
Marine Ecosystem ◽  
Fish Fauna ◽  
The Black Sea ◽  
Sandy Bottom ◽  
Rapana Venosa ◽  
New Information ◽  
Bottom Zone

Systematic monitoring of ecologically significant species – predatory mollusc Rapana venosa Valenciennes, 1846 populations – is an important part of the Black Sea monitoring. The study of the role of R. venosa in contemporary marine ecosystem is of considerable interest. In June-September 2015-2016 the study of consorting relations of rapana was conducted in situ with a parallel sampling by diver. In the course of research new information about the interaction of R. venosa with the fish fauna has been obtained. Of particular importance for fishes is the presence of rapana in the sandy bottom zone, where there are no natural shelters, and food resources are limited. The most important for the fish is the presence on the rapana shells of algal fouling and epiphyton. The shells of invader – R. venosa – and its fouling create additional opportunities for the survival of some fish fauna representatives juveniles of the Black Sea. The data obtained extend the concepts of ecological role of mollusc – invader R. venosa, as well as the ecology and ethology of several fish species.

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