Mesoscale eddies in the Black Sea from satellite altimetry data

Kubryakov, A. A.; Stanichny, S. V.

doi:10.1134/s0001437015010105

Cited by 52 publications

(38 citation statements)

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“…In the northern part of the basin where the movement of eddies and the BSRC coincides with the direction of Rossby waves propagation (westwards), we observe more long-lived eddies than in the southern part where the eddies move eastwards. The same results were also obtained in [6] according to altimetry data. The maps of eddy observation probability at all depths (Fig.…”

supporting

confidence: 73%

“…2, a. Eddies in the Black Sea basin mainly move in a cyclonic direction along with the Black Sea Rim Current (BSRC) jet. This corresponds with the previous works [4][5][6]. According to the calculation data, the most long-lived eddies occur in the region of the Sevastopol anticyclone, the Caucasian coast, the Batumi anticyclone and near the central part of the Anatolian coast [5,9].…”

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confidence: 94%

“…In the lower layers the velocity of eddies usually decays and for the layer under 200 m lim ν was taken as equal to 0.02 m/s. Such value is approximately equal to the mean velocity of eddy movement in the Black Sea: с = 0.02-0.04 m/s [6]. This corresponds to the value of nonlinearity parameter 1 / lim > c P ν = , which is characteristic of nonlinear eddies that are able to transport a matter [21].…”

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confidence: 99%

“…max R and lim ν parameters are chosen on the basis of a comparison of identification results with the existing data on eddy dimensions and velocity in the Black Sea. At all horizons max R was set as equal to 80 km, which corresponds to the data on the maximum eddy dimensions in the Black Sea from [1][2][3][4][5][6][7][8][9][10][11]. lim ν minimum velocity changed vertically.…”

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confidence: 99%

“…The algorithm for three-dimensional automatic eddy identification is based on the "winding angle" method [16], used in [6] for studying the characteristics of the Black Sea eddies by the fields of surface geostrophic velocities obtained from altimeter data. The method is based in the selection of closed streamlines in a velocity field.…”

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confidence: 99%

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Three-Dimensional Identification of the Black Sea Mesoscale Eddies according to NEMO Numerical Model Calculations

Kubryakov¹,

Mizyuk²,

Puzina³

et al. 2018

PhO

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A new method of three-dimensional identification of mesoscale eddies based on the results of the Black Sea hydrodynamics modeling is applied. It is based on identification of the closed streamlines in the velocity fields. This method and the data resulted from the NEMO calculations for [2005][2006][2007][2008] are used to identify more than 1000 mesoscale eddies in the basin. The results permit to define eddy characteristic trajectories, calculate spatial variability of their velocities and radii and frequency of detection of cyclones and anticyclones. The obtained results are in good agreement with the earlier published studies of the eddy characteristics derived from satellite and in situ data. The modeling results permit to investigate the features of vertical distribution of eddy characteristics. The eddies are most often detected in the 0-150 m layer (the highest detection frequency F is within 20-50 m). In the 150-300 m layer this value is two times smaller, but still is substantial. Below 300 meters F quickly decreases with depth. The analogous distribution is characteristic of the eddy radii and orbital velocity: the highest values are observed in the upper 0-150 m layer, and in the lower layers they sharply decrease with depth. The analysis of seasonal variability of the eddy characteristics shows that the anticyclonic dynamics intensifies in summer, whereas the cyclonic one -in winter, that is consistent with the previous studies. The developed method provides additional opportunities for investigating the features of the eddy generation and evolution in the Black Sea.

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confidence: 73%

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confidence: 94%

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confidence: 99%