scholarly journals Fast ice dynamics of the sea of Azov in the XXI centure

2021 ◽  
Vol 27 (3) ◽  
pp. 74-84
Author(s):  
Anastasiia Magaeva ◽  
Natalia Yaitskaya
Keyword(s):  
Winter Period ◽  
Spatial And Temporal Variability ◽  
Northern Coast ◽  
Sea Of Azov ◽  
Ice Dynamics ◽  
The Sea Of Azov ◽  
Air Temperatures ◽  
Fast Ice ◽  
Taganrog Bay

The article is dedicated to the investigation of the fast ice dynamics for the period 2000–2020 according to satellite data and field observations using GIS technologies. We used data from International Data Center – Sea Ice and coastal observation points to analyze long-term changes. Data processing and analysis was carried out using the ArcGIS 10.4 software package. As a result, data were obtained on the spatial and temporal variability of fast ice in the Sea of Azov for the 2000–2020. The area and width of fast ice, the periods of formation, destruction and duration were analyzed. The maps of the fast ice formation frequency were constructed for each month of the winter period: December–March. It is shown that the duration of fast ice on all coastal observation points decreased: for points on the northern coast Taganrog and Mariupol—by 3–5 days, for points on the southern coast of Taganrog Bay—Yeisk and Dolzhanskaya—by 10–12 days, for point Genichesk—7 days. Average long-term fast ice area for 2000–2020 is 1800 km2. But against the background of an increase in winter air temperatures, the fast ice area is decreasing, and in the last winter periods it is not observed. The width of the fast ice at the northern coast of the Sea of Azov and the Taganrog Bay is 5–10 km. In the western and southeastern parts of the sea (sections Temryuk, Arabatskaya and Obitochny), the fast ice width is 2–5 km on average over the winter and was observed in 25 % of cases.

scholarly journals Dynamics of the ice regime of the Sea of Azov in the XX–XXI centuries

2018 ◽  
Vol 58 (3) ◽  
pp. 373-386 ◽  
Author(s):  
N. V. Yaitskaya ◽  
A. A. Magaeva
Keyword(s):  
Ice Cover ◽  
Sea Surface ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Azov Sea ◽  
Fast Ice ◽  
Ice Regime ◽  
Degree Of Severity ◽  
Ice Period

The ice regime of the Sea of Azov over the period of 20th and 21nd centuries was investigated using the author's GIS «The ice regime of the Southern Seas of the Russia». The long-term dynamics of the ice cover, duration of the ice stay as well as beginning and end of the ice period were considered. It has been found that for the period of 1950–2015 the average annual value of the Azov Sea ice cover area is 33%, while the average area of the fast ice is 6.3% of the total area of the sea. Value of duration of the ice cover stay on the sea surface has been refined, and this value is 115 days near the hydro-meteorological station (HMS) Taganrog and 63 days near the HMS Kerch. The typification of winters according to the degree of severity was performed on the basis of data from three coastal meteorological stations: Taganrog, Genichesk, and Kerch. Winters of moderate type were shown to be prevailing during the entire analyzed period. Totally, 15 severe, 70 moderate and 40 mild winters were isolated for the period 1883-2015, while for 1950–2015 the statistics was the following: 9 severe, 43 moderate, and 14 mild winters in Taganrog, and 10 severe, 40 moderate, and 16 mild winters in Kerch.

scholarly journals USING REANALYSIS DATA FOR RESEARCHING THE ICE COVER OF THE SEA OF AZOV

2020 ◽  
Vol 2 (5) ◽  
pp. 37-42
Author(s):  
A.A. Magaeva ◽  
◽  
Keyword(s):  
Winter Season ◽  
Ice Cover ◽  
Reanalysis Data ◽  
Sea Of Azov ◽  
Climate Data ◽  
Alternative Source ◽  
Sea Ice Concentration ◽  
The Sea Of Azov ◽  
Air Temperatures

The article presents an analysis of the results of the OSI-450 reanalysis as an alternative data source for the study of the ice cover of the Azov Sea. OSI-450 is the second major version of the OSI SAF Global Sea Ice Concentration Climate Data Record (CDR). The OSI-450 product is available for the period 1979 to 2015.Using licensed software ArcGIS 10.*, a model for data processing was created. The average long-term value of the ice cover for the period 2000–2015 according to the OSI-450 reanalysis data is 23.3 %, according to GIS data – 37.2 %; the maximum and minimum values are 43 % / 69.4 % and 8.2 % / 8 %, respectively. The correlation coefficient with the sum of average monthly air temperatures is minus 0.87 (air temperature for the winter season is a main factor that determines the ice conditions of the Sea of Azov). It is shown that the OSI-450 reanalysis data underestimate the ice extent for the season, but on the whole reproduces the long-term dynamics of the ice cover for the period under consideration. Based on the study, it was concluded that the OSI-450 reanalysis can act as an alternative source of data on the state of the ice cover, but taking into account correction factors.

THE IMPACT OF WIND CONDITIONS ON THE LEVELS OF TOTAL IRON CONTENT IN THE SEA OF AZOV

2017 ◽  
Author(s):  
Yuri Fedorov ◽  
Yuri Fedorov ◽  
Irina Dotsenko ◽  
Irina Dotsenko ◽  
Leonid Dmitrik ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Iron Content ◽  
Iron Concentration ◽  
Total Iron ◽  
Sea Of Azov ◽  
Open Area ◽  
The Sea Of Azov ◽  
Dissolved Iron ◽  
The Impact ◽  
Taganrog Bay

The distribution and behavior of certain of trace elements in sea water is greatly affected by both physical, chemical and hydrometeorological conditions that are showed in the scientific works of prof. Yu.A. Fedorov with coauthors (1999-2015). Due to the shallow waters last factor is one of the dominant, during the different wind situation changes significantly the dynamics of water masses and interaction in the system “water – suspended matter – bottom sediments”.Therefore, the study of the behavior of the total iron in the water of the sea at different wind situation is relevant. The content of dissolved iron forms migration in The Sea of Azov water (open area) varies from 0.017 to 0.21 mg /dm3 (mean 0.053 mg /dm3) and in Taganrog Bay from 0.035 to 0.58 mg /dm3 (mean 0.11 mg /dm3) and it is not depending on weather conditions.The reduction in the overall iron concentration in the direction of the Taganrog Bay → The Sea of Azov (open area) is observed on average more than twice. The dissolved iron content exceeding TLV levels and their frequency of occurrence in the estuary, respectively, were higher compared with The Sea of Azov (open area).There is an increase in the overall iron concentration in the water of the Azov Sea on average 1.5 times during the storm conditions, due to the destruction of the structure of the upper layer and resuspension of bottom sediments, intensifying the transition of iron compounds in the solution.

scholarly journals Extreme Warming in the Kara Sea and Barents Sea during the Winter Period 2000–16

2017 ◽  
Vol 30 (22) ◽  
pp. 8913-8927 ◽  
Author(s):  
Svenja H. E. Kohnemann ◽  
Günther Heinemann ◽  
David H. Bromwich ◽  
Oliver Gutjahr
Keyword(s):  
Sea Ice ◽  
Air Temperature ◽  
Barents Sea ◽  
Kara Sea ◽  
The Arctic ◽  
Winter Period ◽  
Limited Area ◽  
Spatial And Temporal Variability ◽  
Large Variability ◽  
Air Temperatures

The regional climate model COSMO in Climate Limited-Area Mode (COSMO-CLM or CCLM) is used with a high resolution of 15 km for the entire Arctic for all winters 2002/03–2014/15. The simulations show a high spatial and temporal variability of the recent 2-m air temperature increase in the Arctic. The maximum warming occurs north of Novaya Zemlya in the Kara Sea and Barents Sea between March 2003 and 2012 and is responsible for up to a 20°C increase. Land-based observations confirm the increase but do not cover the maximum regions that are located over the ocean and sea ice. Also, the 30-km version of the Arctic System Reanalysis (ASR) is used to verify the CCLM for the overlapping time period 2002/03–2011/12. The differences between CCLM and ASR 2-m air temperatures vary slightly within 1°C for the ocean and sea ice area. Thus, ASR captures the extreme warming as well. The monthly 2-m air temperatures of observations and ERA-Interim data show a large variability for the winters 1979–2016. Nevertheless, the air temperature rise since the beginning of the twenty-first century is up to 8 times higher than in the decades before. The sea ice decrease is identified as the likely reason for the warming. The vertical temperature profiles show that the warming has a maximum near the surface, but a 0.5°C yr−1 increase is found up to 2 km. CCLM, ASR, and also the coarser resolved ERA-Interim data show that February and March are the months with the highest 2-m air temperature increases, averaged over the ocean and sea ice area north of 70°N; for CCLM the warming amounts to an average of almost 5°C for 2002/03–2011/12.

scholarly journals Phenology of flight of сhironomid flies (Diptera: Chironomidae) in Taganrog Bay of the Sea of Azov

2013 ◽  
Vol 9 (2) ◽  
pp. 329-332
Author(s):  
N.I. Bulysheva ◽  
◽  
M.V. Nabozhenko ◽  
A.I. Savikin ◽  
I.V. Shokhin ◽  
...  
Keyword(s):  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Taganrog Bay

Long-term changes in the benthic communities of the Sea of Azov related to the sedimentation and hydrological regime

Oceanology ◽  
2008 ◽  
Vol 48 (3) ◽  
pp. 390-400 ◽  
Author(s):  
G. G. Matishov ◽  
I. V. Shokhin ◽  
M. V. Nabozhenko ◽  
V. V. Pol’shin
Keyword(s):  
Benthic Communities ◽  
Hydrological Regime ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Long Term Changes

scholarly journals LONG-TERM TRENDS IN CHANGES IN METEOROLOGICAL PARAMETERS OF THE SEA OF AZOV REGION

2020 ◽  
Vol 1 (5) ◽  
pp. 130-137
Author(s):  
L.V. Dashkevich ◽  
Keyword(s):  
Air Temperature ◽  
Precipitation Amount ◽  
Winter Season ◽  
Atmospheric Precipitation ◽  
Sea Of Azov ◽  
Southern Coast ◽  
The Sea Of Azov ◽  
Wind Speeds ◽  
Seasonal Wind

The article discusses the long-term changes in air temperature, wind speed and precipitation amount according to observations at the Primorsko-Akhtarsk, Kerch, Genichesk hydrometeorological stations on the coast of the Sea of Azov Analysis of the data for the selected periods revealed an increase in the average values of air temperature from the beginning of the 20th to the beginning of the 21st centuries, both at annual values and for all seasons. The largest increase in average values was noted for the winter, slightly less for the spring-summer season. Warming affected the southern coast least of all. On the entire coast of the Sea of Azov, a decrease in the average annual and seasonal wind speeds is observed throughout the entire century under consideration. The value of the standard deviation of wind speeds has decreased significantly, especially in the winter season. The largest decrease in the average annual and seasonal wind speeds (more than 2 times) was noted at the Primorsko-Akhtarsk HMS. From the beginning of the 20th century to the beginning of the 21st century, there is an increase in the average annual amounts of atmospheric precipitation on the western and southern coast of the sea (by about 130 mm) with an increase in the variability of their amount from year to year. Seasonal changes in the distribution of precipitation were revealed: in the modern period, the proportion of winter and spring precipitation has increased, while the proportion of autumn and, especially, summer precipitation has decreased. The greatest changes in the precipitation regime were noted for the Primorsko-Akhtarsk HMS.

scholarly journals Spiders (Aranei) of the coast of Taganrog Bay (the Sea of Azov) and the Don River delta

2016 ◽  
Vol 12 (1) ◽  
pp. 3-28 ◽  
Author(s):  
A.V. Ponomarev ◽  
◽  
E.V. Prokopenko ◽  
P.P. Ivliev ◽  
V.Yu. Smatko ◽  
...  
Keyword(s):  
River Delta ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Don River ◽  
Taganrog Bay
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