scholarly journals STRUCTURE OF THE SHAKHE RIVER OUTFLOW IN THE BLACK SEA ACCORDING TO REMOTE, PYROMETRIC AND CONTACT MEASUREMENTS

2019 ◽  
Vol 47 (3) ◽  
pp. 220-232
Author(s):  
D. V. Khlebnikov ◽  
A. Yu. Ivanov ◽  
B. V. Konovalov
Keyword(s):  
Black Sea ◽  
Optical Sensors ◽  
Satellite Images ◽  
Flow System ◽  
Test Site ◽  
The Black Sea ◽  
River Outflow ◽  
Marine Site ◽  
Seawater Samples ◽  
Optical Structure

The results of studies of hydrophysical and bio-optical structure of the outflow of the Shakhe River, conducted during the IO RAS expedition “Black Sea-2018” at the marine site near Golovinka on the RV “Ashamba” on 1–2 June 2018, are presented. Information synchronously obtained, both with the help of remote sensing satellites (radar and optical sensors), infrared portable pyrometer, and onboard the RV (CTD probe as part of a shipboard flow system), was used. At the same time, seawater samples were taken from the sea surface layer, followed by laboratory analysis of their bio-optic and geochemical characteristics. Hydrophysical characteristics and submesoscale structure of the Shakhe River outflow at the test site studied both remotely and contactly, gave identical results. This makes it possible to further efficiently use these instruments on board of RVs to study the river outflows in the Black Sea. At the same time, portable infrared pyrometers make it possible to obtain significantly better spatial resolution in terms of temperature compared with satellite instruments, while satellite images can detect river outflows in the sea, their boundaries and structure.

SHORT-TERM DYNAMICS OF THE ANAPA BAY-BAR SHORELINE

2017 ◽  
Author(s):  
Marina Krylenko ◽  
Marina Krylenko ◽  
Alexandr Aleynikov ◽  
Alexandr Aleynikov ◽  
Viacheslav Krylenko ◽  
...  
Keyword(s):  
Black Sea ◽  
Satellite Images ◽  
The Black Sea ◽  
Northwestern Part ◽  
Short Term ◽  
Shoreline Position ◽  
Local Dynamics ◽  
Average Displacement ◽  
Local Erosion

The Anapa bay-bar is located in the northwestern part of the Black Sea. With the goal in mind to determine the short-term dynamics of the Anapa bay-bar we analyzed satellite images from 2003 to the present. Depending on the hydro-lithodynamical situation the shoreline configuration during storm can vary from a rectilinear to sinusoidal forms. There are regions of local erosion or accumulation whose formation is related to the alongshore motion of sediments and dynamics of underwater bars. Comparison of the data on 1965 and 1966 showed that in this period the amplitude of the shoreline position was more than 20 m but average displacement of the shoreline for 13 months was only 0.8 m. This study showed that for the analysis of changes in the shoreline position is necessary to consider the configuration of the coastline at the time of each observation and the local dynamics.

The Black Sea factor influencing the wastewater disposal strategy for Istanbul

1995 ◽  
Vol 32 (7) ◽  
pp. 63-70
Author(s):  
I. Ethem Gönenç ◽  
Oguz Müftüoglu ◽  
Bilsen Beler Baykal ◽  
Ertugrul Dogan ◽  
Hüseyin Yüce ◽  
...  
Keyword(s):  
Black Sea ◽  
Satellite Images ◽  
The Black Sea ◽  
Marmara Sea ◽  
Research Institutions ◽  
Trophic Conditions ◽  
Wastewater Disposal ◽  
The World ◽  
Collaborative Efforts

Unlike other seas of the world, the Black Sea shows unique quality and trophic properties. Fortunately, only the upper layer water of the Black Sea is introduced into the Bosphorus and has a significant effect on the quality and trophic conditions of the Marmara Sea. These effects are discussed in the light of data obtained from collaborative efforts of Turkish and Romanian research institutions and processed satellite images. In conjunction with these discussions, recommendations for a suitable effluent disposal strategy for Istanbul's wastewater have been given.

Investigation of coastal morphological changes due to river basin characteristics by means of remote sensing and GIS techniques

2003 ◽  
Vol 48 (10) ◽  
pp. 135-142 ◽  
Author(s):  
D.Z. Seker ◽  
C. Goksel ◽  
S. Kabdasli ◽  
N. Musaoglu ◽  
S. Kaya
Keyword(s):  
Black Sea ◽  
Satellite Data ◽  
Satellite Images ◽  
Sandy Beach ◽  
Morphological Changes ◽  
Remote Sensing And Gis ◽  
The Black Sea ◽  
Black Sea Coast ◽  
Delta Formation ◽  
Bathymetric Changes

The Riva River is located on the Anatolian (Asian) side of Istanbul by the Black Sea coast, with a wonderful sandy beach and delta formation which has been selected as the study area. The Riva is the largest river in this region, which flows into the Black Sea and also gives its’ name to the area. The river carries some amount of sediments to the Black Sea. These particles cause considerable changes not only in the bed bathymetry and coastal boundaries of the river but also along the coastline of the Black Sea. The aim of this study is to determine these variations by means of satellite data and GIS. In the study, satellite images dated 1975, 1984, 1992 and 2001 have been used. At the end of the study, the possibility of observing bathymetric changes in front of the coastline by means of satellite data has been investigated and results were evaluated and visualised by means of GIS.

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>

SHORT-TERM DYNAMICS OF THE ANAPA BAY-BAR SHORELINE

2017 ◽  
Author(s):  
Marina Krylenko ◽  
Marina Krylenko ◽  
Alexandr Aleynikov ◽  
Alexandr Aleynikov ◽  
Viacheslav Krylenko ◽  
...  
Keyword(s):  
Black Sea ◽  
Satellite Images ◽  
The Black Sea ◽  
Northwestern Part ◽  
Short Term ◽  
Shoreline Position ◽  
Local Dynamics ◽  
Average Displacement ◽  
Local Erosion

The Anapa bay-bar is located in the northwestern part of the Black Sea. With the goal in mind to determine the short-term dynamics of the Anapa bay-bar we analyzed satellite images from 2003 to the present. Depending on the hydro-lithodynamical situation the shoreline configuration during storm can vary from a rectilinear to sinusoidal forms. There are regions of local erosion or accumulation whose formation is related to the alongshore motion of sediments and dynamics of underwater bars. Comparison of the data on 1965 and 1966 showed that in this period the amplitude of the shoreline position was more than 20 m but average displacement of the shoreline for 13 months was only 0.8 m. This study showed that for the analysis of changes in the shoreline position is necessary to consider the configuration of the coastline at the time of each observation and the local dynamics.

scholarly journals Undercurrents in the Northeastern Black Sea Detected on the Basis of Multi-Model Experiments and Observations

2021 ◽  
Vol 9 (9) ◽  
pp. 933
Author(s):  
Sergey G. Demyshev ◽  
Olga A. Dymova ◽  
Natalia V. Markova ◽  
Evgenia A. Korshenko ◽  
Maksim V. Senderov ◽  
...  
Keyword(s):  
Black Sea ◽  
Deep Water ◽  
Numerical Models ◽  
Test Site ◽  
Ocean Dynamics ◽  
The Black Sea ◽  
In Situ Data ◽  
The North ◽  
Simulation Results

Numerical simulation results of the Black Sea circulation obtained by four ocean dynamics models are compared to each other and to in situ data in order to determine the features of the Black Sea deep-water circulation such as deep-water undercurrents. The year 2011 is chosen as the test period due to the availability of deep-sea observations, including ARGO profiles and ADCP current velocities. Validation of the simulation results is based on comparison with the temperature and salinity measured by the ARGO floats. Anticyclonic currents (undercurrents) under the cyclonic Rim Current are detected by the results of all numerical models near the North Caucasian coast. The main characteristics of undercurrents are consistent with in situ data on current velocity up to a depth of 1000 m obtained by the Aqualog probe at the IO RAS test site near Gelendzhik in June 2011. The analysis of the spatio-temporal variability of the modeled salinity and velocity fields reveals that the most probable origin of the undercurrents is the horizontal density gradient of seawater in the region.

scholarly journals Estimation of activity the methane seepage from the Black Sea floor using MODIS images and geosciences data

2018 ◽  
Vol 26 (1) ◽  
pp. 135-142
Author(s):  
T. A. Melnichenko
Keyword(s):  
Black Sea ◽  
Satellite Images ◽  
Weather Data ◽  
The Black Sea ◽  
Northwestern Part ◽  
Data Set ◽  
Methane Gas ◽  
Methane Seepage ◽  
Cloudy Weather ◽  
Gas Seepage

The publication presents the results of a certain stage of the study: the features of methane gas seepage characteristics in the transition zone of shelf-continental slope in the region of the Dnieper Paleodelts in the northwestern part of the Black Sea are identified, taking into account the data set: information of satellite images and of geological-geophysical (acoustic) data. About 2000 of the MODIS satellite images (product MOD021KM) are acquired in stages over one year period. The image processing was carried out in the GIS environment. It was established that the volume of methane gas seepage on the investigated site is fixed on satellite images and is most pronounced during increased seismotectonic activity (activation of earthquakes in the Black Sea region) - this is due to the tectonic structure of the study area, which is in the regional plan on the edge of the Eastern European platform, and in the local area, is the Dnepr paleo-delta in the zone of decomposition, which is an additional factor for gas outlets here. On satellite images small clouds are observed in cloudy weather or absence of clouds on the background of continuous clouds. This is due to the physical properties of methane, which is (according to geochemical studies) about 99% of the released gas. Methane rising from the bottom of the sea to the surface, and then to the troposphere is much colder than the surface water and warmer than the atmosphere layer, which provokes the formation of condensate over the site with methane gas seepage, and when the weather conditions change, forming a rainy cloud with a sharp drop in temperature, the volume of methane gas of seepage up are much warmer than clouds, forming a cloudy area on a background of continuous clouds. This phenomenon is recorded in various spectral (thermal and infrared) bands in satellite images (NASA – MODIS, NOAA, etc.), methane rising to the lower layers of the atmosphere intensively absorbs thermal radiation of the Earth in the infrared spectral region at a wavelength of 7.66 µm. It enables to determine the methane gas seepage in satellite images for future studies of gas outlets from the bottom of the sea, taking into account the geological information and additional hydrological  and weather data. The conducted monitoring of the satellite images showed that during the period of increased seismic activity in this region (in particular under the influence of the zone Vranch), it directly affects the tectonic situation in the northwestern part of the Black Sea and increases the emissions of methane gases from the bottom of the sea, which are then recorded on the MODIS sensor. 

scholarly journals Modelling episode of Saharan dust transfer over the Black Sea according to the WRF model and MODIS satellite data

2021 ◽  
Vol 285 ◽  
pp. 08004
Author(s):  
Anna Papkova ◽  
Yulia Papkova ◽  
Dmitrii Shukalo
Keyword(s):  
Black Sea ◽  
Satellite Images ◽  
Wrf Model ◽  
Saharan Dust ◽  
The Black Sea ◽  
Optical Parameters ◽  
Sahara Desert ◽  
Black Sea Region ◽  
Dust Transport ◽  
Dust Load

A high dust load from the Sahara Desert is recorded annually over the Black Sea region. To make a reliable forecast for the level of dust, many external factors such as the wind energy, the soil content in the moisture are to be considered. The physical characteristics of the aerosol particles in the atmosphere are also very important. This study focuses on the prediction of dust content for the Black Sea region by using the WRFdust model. Prolonged dust transport over the Black Sea was recorded during the period from September 25 to September 30, 2020. On these days, MODIS satellite images, return trajectories of AERONET and optical parameters of the atmosphere were analyzed.

MAPPING OF VARIATIONS IN THE ANAPA BAY BAR LANDSCAPE-MORPHOLOGIC STRUCTURE WITH HIGH-RESOLUTION SATELLITE IMAGES

2017 ◽  
Author(s):  
Valentina Kravtsova ◽  
Valentina Kravtsova ◽  
Ekaterina Chalova ◽  
Ekaterina Chalova ◽  
Vayacheslav Krylenko ◽  
...  
Keyword(s):  
High Resolution ◽  
Black Sea ◽  
Wind Direction ◽  
Anthropogenic Impact ◽  
Satellite Images ◽  
Morphological Structure ◽  
The Black Sea ◽  
Anthropogenic Influence ◽  
High Resolution Satellite Images ◽  
High Resolution Images

The Anapa bay bar is at present one of only a few sand beaches in the Black Sea coastal zone of Russia. The bay bar includes three main belts – beach, dune belt and hillocky sands. A strong anthropogenic impact is observed: the landscape-morphological structure of the dune belt is disturbed, so monitoring of the bay bar is essential . For this purpose we had compiled a series of maps of landscape-morphological structure for the Blagoveschensk and Vityazevo-Anapa parts of the bay bar using high-resolution images from WorldView-2 satellite. Interpretation of stereo-pairs of multitemporal images was carried out at the scale of 1:2000, while a series of maps was compiled at the scale of 1:5000. Twelve sites with different landscape-morphologic structure are covered by these maps and characterized. The structure depends on geomorphologic neighborhood (adjacency to the cliff or to the lagoon) and aspect to wind direction, but mainly on the degree of anthropogenic influence. So the dune belt has been formed at the beach in some areas, but in other areas the dune belt is located behind the beach, or sometimes has disappeared. The compiled maps clearly reflect these variations and show their mainly anthropogenic origin. These maps will help to investigate adaptive solutions for Anapa bay bar conservation and protection.

MAPPING OF VARIATIONS IN THE ANAPA BAY BAR LANDSCAPE-MORPHOLOGIC STRUCTURE WITH HIGH-RESOLUTION SATELLITE IMAGES

2017 ◽  
Author(s):  
Valentina Kravtsova ◽  
Valentina Kravtsova ◽  
Ekaterina Chalova ◽  
Ekaterina Chalova ◽  
Vayacheslav Krylenko ◽  
...  
Keyword(s):  
High Resolution ◽  
Black Sea ◽  
Wind Direction ◽  
Anthropogenic Impact ◽  
Satellite Images ◽  
Morphological Structure ◽  
The Black Sea ◽  
Anthropogenic Influence ◽  
High Resolution Satellite Images ◽  
High Resolution Images

The Anapa bay bar is at present one of only a few sand beaches in the Black Sea coastal zone of Russia. The bay bar includes three main belts – beach, dune belt and hillocky sands. A strong anthropogenic impact is observed: the landscape-morphological structure of the dune belt is disturbed, so monitoring of the bay bar is essential . For this purpose we had compiled a series of maps of landscape-morphological structure for the Blagoveschensk and Vityazevo-Anapa parts of the bay bar using high-resolution images from WorldView-2 satellite. Interpretation of stereo-pairs of multitemporal images was carried out at the scale of 1:2000, while a series of maps was compiled at the scale of 1:5000. Twelve sites with different landscape-morphologic structure are covered by these maps and characterized. The structure depends on geomorphologic neighborhood (adjacency to the cliff or to the lagoon) and aspect to wind direction, but mainly on the degree of anthropogenic influence. So the dune belt has been formed at the beach in some areas, but in other areas the dune belt is located behind the beach, or sometimes has disappeared. The compiled maps clearly reflect these variations and show their mainly anthropogenic origin. These maps will help to investigate adaptive solutions for Anapa bay bar conservation and protection.

Sign in / Sign up

Export Citation Format

Share Document