Wind velocity and wind curl variability over the Black Sea from QuikScat and ASCAT satellite measurements

Kubryakov, A. A.; Stanichny, S. V.; Шокуров, М. В.; Garmashov, Anton

doi:10.1016/j.rse.2019.01.034

Cited by 23 publications

(16 citation statements)

References 58 publications

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“…The maximum value of positive correlation is 0.84, negative -0.57. This result is in good agreement with a similar calculation performed according to the ERA Interim data in [13].…”

Section: Wind Stress Curl Relationship With the Large-scale Pressure Fieldsupporting

confidence: 91%

“…The flow around the Caucasus Mountains by the most frequent northeastern winds in the region leads to the fact that in the eastern part of the sea, almost throughout the year, the cyclonic curl of the wind prevails with the highest values in the winter season. This effect is noted in [7,13,17] based on the data of regional models, reanalyses [20,21] and satellite scatterometers [22,23], regardless of the data resolution (Fig. 1, b -e).…”

Section: Introductionmentioning

confidence: 86%

“…The predominance of cyclonic curl in the eastern part of the sea is also revealed when analyzing its long-term variability [24]. The magnitude of curl is also affected by the wind velocity value due to an increase in the velocity shear during strong winds [13].…”

Section: Introductionmentioning

confidence: 88%

“…In addition, synoptic cyclones formed at the Mediterranean Sea can pass and intensify above the sea [9]. Due to regional orographic effects, and in particular the wind flow around the Caucasus Mountains, the mesoscale cyclonic formations, mainly forming in the eastern part of the sea, appear [12,13]. Seasonal variations in the contrasts of buoyancy fluxes in the atmosphere above the sea and the surrounding land also contribute to wind curl.…”

Section: Introductionmentioning

confidence: 99%

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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

Shokurova¹,

Kubryakov²,

Шокуров³

2021

PhO

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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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“…The maximum value of positive correlation is 0.84, negative -0.57. This result is in good agreement with a similar calculation performed according to the ERA Interim data in [13].…”

Section: Wind Stress Curl Relationship With the Large-scale Pressure Fieldsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Shokurova¹,

Kubryakov²,

Шокуров³

2021

PhO

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“…Such a distribution is associated with spatial features of the wind velocity field above the basin (Fig. 8, b) [43]. The prevailing wind direction above the Black Sea is the northeastern one.…”

Section: Mld Thickness In the Warm Period Of The Year And Its Relatiomentioning

confidence: 76%

The Black Sea Mixed Layer Depth Variability and Its Relation to the Basin Dynamics and Atmospheric Forcing

Kubryakov¹,

Белокопытов²,

Zatsepin³

et al. 2019

PhO

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Spatio-temporal variability of the mixed layer depth (MLD) in different areas of the Black Sea in 1985-2017, its relationship with basin dynamics and atmospheric forcing are studied. Methods and Results. The study is based on the hydrological data archive for 1985-2017 including the measurements of the ship expeditions, the Argo buoys and the moored buoy "Aqalog". Seasonal and interannual variability of the mixed layer depth was determined using the density criterion (dr = = 0.07kg/m 3) between the surface layers and the base of the upper mixed layer. Conclusions. In January-March, the large-scale and mesoscale dynamics significantly affects the mixed layer depth variability. Minimum monthly average values of the mixed layer depth in winter are observed in the mesoscale cyclonic eddies and in the center of the sea (20-30 m), the moderate valueson the periphery of the basin (40-45 m) and the maximum onesin the mesoscale anticyclones (60-70 m). Several times the mixed layer depth values exceeding 150 m were detected in the downwelling areas of the basin. Analysis of the whole period (1985-2017) shows that the mixed layer density was never more than 1015 kg/m 3. This isopycnal limits the maximum possible depth of the upper mixed layer. The impact of wind velocity on the spatial and temporal variability of the mixed layer thickness is the largest in spring and autumn when the seasonal thermocline is weak. It is less important in summer when solar heating stabilizes the upper layer, and in winter when the mixed layer depth is large. Rise of the mixed layer depth in summer is observed in recent years that is associated with rise of the wind speed in a warm period of a year.

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Evaluation of regional climate models and future wind characteristics in the Black Sea

Islek

Yüksel

Şahin

2021

Intl Journal of Climatology

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The main objective of the present study is to provide a comprehensive image of the expected wind patterns along the 21st century in the Black Sea using the wind fields simulated by Regional Climate Model (RCM), namely Rossby Centre regional atmospheric model (version RCA4). Long-term averages, long-term variability, and long-term trends in wind characteristics over the Black Sea are evaluated in two future time slices (near future 2021-2060 and middle future 2061-2100) under the two climate scenarios (RCP4.5 and 8.5). Detailed analysis of wind (annual mean and 99th percentile wind speeds) and storm characteristics (number and duration of storms) are conducted for three different locations selected on the same meridional section to assess the variability on the wind characteristics from west to east. Spatiotemporal variability on the wind characteristics indicates that the eastern Black Sea will be characterized by lower mean wind speed, stronger 99th percentile wind speed, and higher variability. Considering the global indicators of climate change (e.g., increasing frequency and intensity of extreme events), the eastern Black Sea, characterized by complex atmospheric circulation due to surrounding mountains, is more likely to be subjected to the impacts of climate change as the occurrence of extreme wind speeds in future periods is more prominent in this region. In the future periods, the 100-year return period wind speeds increase approximately 7% and 27% in the western and eastern Black Sea, respectively, compared to the historical period. The strong and relatively stable winds with low variability in the western Black Sea indicate a reliable, persistent, and sustainable wind energy potential in this region in the future.

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Wind velocity and wind curl variability over the Black Sea from QuikScat and ASCAT satellite measurements

Cited by 23 publications

References 58 publications

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

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

The Black Sea Mixed Layer Depth Variability and Its Relation to the Basin Dynamics and Atmospheric Forcing

Evaluation of regional climate models and future wind characteristics in the Black Sea

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