Characteristics of topographic submesoscale eddies off the Crimea coast from high-resolution satellite optical measurements

Aleskerova, A. A.; Kubryakov, A. A.; Stanichny, S. V.; Medvedeva, A. V.; Plotnikov, Evgeniy; Mizyuk, A. I.; Verzhevskaia, Liudmila

doi:10.1007/s10236-021-01458-9

Cited by 13 publications

(31 citation statements)

References 86 publications

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“…Multisensory satellite measurements are widely used to study sub-mesoscale eddies in the ocean 1,2,3 . This is necessary to ensure sufficient spatio-temporal coverage of the phenomenon under study.…”

Section: Introductionmentioning

confidence: 99%

Contrast characteristics of sub-mesoscale eddies in satellite ocean color data in the region of Tumen River inflow into Peter the Great Bay

Lipinskaya,

Salyuk

2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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The contrast characteristics of sub-mesoscale eddies in the area of the Tumen River outflow into the Peter the Great Bay (Sea of Japan / East Sea) are analyzed from satellite ocean color data (remote sensing reflectance spectra and estimates of the concentration of chlorophyll-a). It was shown that during the study period, the contrast-to-noise ratio based on the calculation of the concentration of chlorophyll-a using bio-optical algorithms have greater values compared to the contrasts calculated from sea surface temperature data. The spectral ranges of the best contrast-to-noise ratio and the depth of formation of the satellite image of eddies are also determined.

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Section: Introductionmentioning

confidence: 99%

Contrast characteristics of sub-mesoscale eddies in satellite ocean color data in the region of Tumen River inflow into Peter the Great Bay

Lipinskaya,

Salyuk

2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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“…Having small sizes and moderate orbital velocities, submesoscale eddies (SE) are characterized by high values of vorticity and vertical velocity (Mahadevan & Tandon, 2006; McWilliams, 2016). Intense vertical and horizontal exchange in these formations can significantly affect the transport of heat, salt, and suspended matter (Aleskerova et al., 2021; Bosse et al., 2015; Kubryakov et al., 2019) and the biological productivity in the upper layers (Levy et al., 2012; Mahadevan & Tandon, 2006; Mikaelyan et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The generation of submesoscale cyclonic eddies is often observed on the periphery of mesoscale anticyclonic eddies, where sharp gradients of current velocity and vorticity cause divergence and formation of SCE due to barotropic and baroclinic instability (Aleskerova et al., 2021; Brannigan, 2016; Brannigan et al., 2017, 2011; Zatsepin et al., 2019). Mesoscale anticyclones in the Black Sea intensify in summer as a result of the weakening of large‐scale cyclonic circulation and its emerging instability (Kubryakov & Stanichny, 2015; Zatsepin et al., 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Several authors showed that in many regions of the World, including the Black Sea (Puzina et al., 2021) it intensifies in winter due to the baroclinic instability of the deep winter mixed layer (Callies et al., 2015; Capet et al., 2008; Mensa et al., 2013; Puzina et al., 2021). During the warm period of the year, the important reasons for the generation of SE: are frontogenesis (Thomas & Ferrari, 2008), topographic and shear instability of currents (Aleskerova et al., 2021; Gula et al., 2015; McWilliams, 2016; Zatsepin et al., 2011).…”

Section: Introductionmentioning

confidence: 99%

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Cross‐Slope Buoyancy Fluxes Cause Intense Asymmetric Generation of Submesoscale Eddies on the Periphery of the Black Sea Mesoscale Anticyclones

2022

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“…A suitable testbed for SME investigation is the Black Sea thanks to its well-developed observational and theoretical scientific facilities [4,5]. Various SME studies are performed for the Black Sea using satellite data [6][7][8] and numerical simulations [9][10][11]. They show, particularly, that SMEs can significantly impact coastal material transport [5,12] and vertical and horizontal distribution of bio-optical characteristics in the basin [13].…”

Section: Introductionmentioning

confidence: 99%

Submesoscale Currents from UAV: An Experiment over Small-Scale Eddies in the Coastal Black Sea

et al. 2022

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A commercial unmanned aerial vehicle (UAV) is used for coastal submesoscale current estimation. The measurements were conducted in the Black Sea coastal area with a DJI Mavic quadcopter operated in self-stabilized mode at different look geometry (200–500-m altitude, 0–30∘ incidence angle). The results of four flights during 2020–2021 are reported. Some scenes captured a train of or individual eddies, generated by a current flowing around a topographic obstacle (pier). The eddies were optically visible due to the mixing of clear and turbid waters in the experiment area. Wave dispersion analysis (WDA), based on dispersion shell signature recognition, is used to estimate the sea surface current in the upper 0.5-m-thick layer. The WDA-derived current maps are consistent with visible eddy manifestations. The alternative method, based on 4D-variational assimilation (4DVAR), agrees well with WDA and can complement it in calm wind conditions when waves are too short to be resolved by the UAV sensor. The error of reconstructed velocity due to the uncontrolled UAV motions is assessed from referencing to static land control points. At a 500-m altitude and 7–10 m s−1 wind speed (reported by a local weather station for 10-m height), the UAV drift velocity, or the bias of the current velocity estimate, is about 0.1 m s−1, but can be reduced to 0.05 m s−1 if the first 10 s of the UAV self-stabilization period are excluded from the analysis. The observed anticyclonic eddies (200–400 m in diameter with 0.15–0.30 m s−1 orbital velocity) have an unexpectedly high Rossby number, Ro∼15, suggesting the importance of nonlinear centrifugal force for such eddies and their significant role in coastal vertical transport.

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Characteristics of topographic submesoscale eddies off the Crimea coast from high-resolution satellite optical measurements

Cited by 13 publications

References 86 publications

Contrast characteristics of sub-mesoscale eddies in satellite ocean color data in the region of Tumen River inflow into Peter the Great Bay

Contrast characteristics of sub-mesoscale eddies in satellite ocean color data in the region of Tumen River inflow into Peter the Great Bay

Cross‐Slope Buoyancy Fluxes Cause Intense Asymmetric Generation of Submesoscale Eddies on the Periphery of the Black Sea Mesoscale Anticyclones

Submesoscale Currents from UAV: An Experiment over Small-Scale Eddies in the Coastal Black Sea

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