Long-term variability of surface temperature in the Black Sea, and its connection with the large-scale atmospheric forcing

2007 ◽  
Vol 68 (1-2) ◽  
pp. 293-301 ◽  
Author(s):  
Alexander S. Kazmin ◽  
Andrei G. Zatsepin
Keyword(s):  
Surface Temperature ◽  
Black Sea ◽  
Large Scale ◽  
The Black Sea ◽  
Atmospheric Forcing

scholarly journals Long term trends in the sea surface temperature of the Black Sea

Ocean Science ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 491-501 ◽  
Author(s):  
G. I. Shapiro ◽  
D. L. Aleynik ◽  
L. D. Mee
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Black Sea ◽  
Sea Surface ◽  
The Black Sea ◽  
The North ◽  
Sst Variability ◽  
Long Term Trends ◽  
Cooling Trend

Abstract. There is growing understanding that recent deterioration of the Black Sea ecosystem was partly due to changes in the marine physical environment. This study uses high resolution 0.25° climatology to analyze sea surface temperature variability over the 20th century in two contrasting regions of the sea. Results show that the deep Black Sea was cooling during the first three quarters of the century and was warming in the last 15–20 years; on aggregate there was a statistically significant cooling trend. The SST variability over the Western shelf was more volatile and it does not show statistically significant trends. The cooling of the deep Black Sea is at variance with the general trend in the North Atlantic and may be related to the decrease of westerly winds over the Black Sea, and a greater influence of the Siberian anticyclone. The timing of the changeover from cooling to warming coincides with the regime shift in the Black Sea ecosystem.

scholarly journals Long term trends in the sea surface temperature of the Black Sea

2010 ◽  
Vol 7 (1) ◽  
pp. 91-119
Author(s):  
G. I. Shapiro ◽  
D. L. Aleynik ◽  
L. D. Mee
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Black Sea ◽  
Sea Surface ◽  
The Black Sea ◽  
The North ◽  
Sst Variability ◽  
Long Term Trends ◽  
Cooling Trend

Abstract. There is growing understanding that recent deterioration of the Black Sea ecosystem was partly due to changes in the marine physical environment. This study uses high resolution 0.25° climatology to analyze sea surface temperature variability over the 20th century in two contrasting regions of the sea. Results show that the deep Black Sea was cooling during the first three quarters of the century and was warming in the last 15–20 years; on aggregate there was a statistically significant cooling trend. The SST variability over the Western shelf was more volatile and it does not show statistically significant trends. The cooling of the deep Black Sea is at variance with the general trend in the North Atlantic and may be related to the decrease of westerly winds over the Black Sea, and a greater influence of the Siberian anticyclone. The timing of the changeover from cooling to warming coincides with the regime shift in the Black Sea ecosystem.

scholarly journals Seasonal and Long-Term Variability of Coccolithophores in the Black Sea According to Remote Sensing Data and the Results of Field Investigations

2022 ◽  
Vol 10 (1) ◽  
pp. 97
Author(s):  
Sergey V. Vostokov ◽  
Anastasia S. Vostokova ◽  
Svetlana V. Vazyulya
Keyword(s):  
Black Sea ◽  
Large Scale ◽  
Remote Sensing Data ◽  
Cold Season ◽  
The Black Sea ◽  
Local Character ◽  
Field Investigations ◽  
Mass Development ◽  
Upper Mixed Layer

Based on satellite data from the SeaWiFS, MODIS-Aqua, and MODIS-Terra scanners, the long-term dynamics of coccolithophores in the Black Sea and their large-scale heterogeneity have been studied. During the twenty years in May and June, mass development of coccolithophores population of different intensities was recorded annually. Summer blooms of coccolithophores reached peak levels in 2006, 2012, and 2017, after abnormally cold winters. It was noted that in conditions of low summer temperatures, the blooming of coccolithophores could be significantly reduced or acquire a local character (2004). In the anomalous cold summer of 2001, coccolithophore blooms were replaced by the mass growth of diatoms. Over twenty years, numerous signs of coccolithophores mass development in the cold season have been revealed. Winter blooms develop mainly in warm winters with periods of low wind activity. The formation of a thermocline and the surface layer’s stability are essential factors for initiating winter blooms of coccolithophores. It was noted that after the winter blooms of coccolithophores, their summer growth was poorly expressed. It is shown that during periods of rapid growth, the bulk of coccolithophores is concentrated in the upper mixed layer and thermocline. During the blooming period, the share of coccolithophores in phytoplankton biomass constituted 70–85%. The intensity of coccolithophore’s blooms is associated with the previous diatoms’ growth level. The effect of eddies circulation on the distribution and growth of coccolithophores is considered.

scholarly journals PRELIMINARY STUDY OF IMPACT WARMING EFFECT TO SPRAT QUALITY CHARACTERISTICS IN RUSSIAN WATERS OF THE BLACK SEA (1951–2019)

2021 ◽  
Vol 1 (6) ◽  
pp. 150-154
Author(s):  
M.M. Piatinskii ◽  
◽  
D.O. Krivoguz ◽  
V.A. Shlyakhov ◽  
R.V. Borovskaya
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Black Sea ◽  
Temperature Factor ◽  
Sea Surface ◽  
The Black Sea ◽  
Correlation Test ◽  
Preliminary Study ◽  
Russian Waters

Preliminary study of impact of temperature factor to sprat quality characteristics in Russian waters of the Black sea in period 1951–2019 was performed. In this research statistical hyphothesis about relationship between indicator sea surface temperature factor near to Chernomorskoe, Yalta, Feodosia and long-term sprat mean weight fishery statistics was done. Linear relationship hyphothesis performed by Pearson correlation test. Preliminary cross-correlation test results shows significant moderate relationship between temperature factor average and mean sprat weights (r = –0,60). After preliminary diagnostics input data was smoothed by polynomial regression to reduce interannual fluctuations and cross-correlation test to smoothed data was repeated. Correlation test by smoothed data indicate strong negative (r = –0,75) relationship between long-term sea surface temperature in all indicator points and mean sprat weights and high powerful relationship between sea surface temperature and oldest sprat classess (r = –0,86). Performed study underline the primary part of temperature factor and warming effect to degradation result in Black sprat fishery quality characteristcs. Global warming effect starting from 1990 made significant negative impact into sprat environment in the Black sea

scholarly journals Influence of Long-Term Changes in the Large-Scale Sea Level Pressure Field on the Wind Regime and the Wind Stress Curl in the Black Sea

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
I. G. Shokurova ◽  
A. A. Kubryakov ◽  
M. V. Shokurov ◽  
◽  
◽  
...  
Keyword(s):  
Sea Level ◽  
Black Sea ◽  
Wind Stress ◽  
Large Scale ◽  
Pressure Field ◽  
The Black Sea ◽  
Wind Stress Curl ◽  
Sea Level Pressure ◽  
Level Pressure

Purpose. The paper is aimed at studying the relationship between the wind regime and the wind stress curl in the Black Sea and the long-term changes in the large-scale sea level pressure field in winter months. Methods and Results. The data on wind speed and sea level pressure in January – February from the NCEP/NСAR reanalysis for 1948–2018 are used. Based on the 6-hour data, the synoptic conditions accompanied by high and low values of the wind stress curl in the sea were determined. The synoptic situations in which a vast anticyclone is located north and northeast of the sea, and the area of low pressure – to the southwest of the sea in the Mediterranean region, are accompanied by the northeast and east winds, and by the cyclonic curl predominance. On the contrary, passing of the cyclones to the north of the sea and increase of pressure to the southwest are followed by the westerly and southwesterly winds, and by the anticyclonic curl predominance. Extremely high monthly mean values of the cyclonic curl were observed in those years, when the area occupied by the Siberian anticyclone increased and expanded westward, so that the Black Sea was on the southwestern periphery of its spur. Extremely low values of the anticyclonic curl were noted when the Azores anticyclone area expanded to the Mediterranean region. The wind stress curl changes on the multidecadal scales have shown its relation to the global changes in the field of the sea level pressure and the sign of the pressure anomalies at the low latitudes. Conclusions. The opposite sign of the surface pressure anomalies to the northeast and southwest of the sea is accompanied by the highest values of the wind stress curl.

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