Satellite Radar Observations of Small Eddies in the White, Barents and Kara Seas

Атаджанова, О.А.; Zimin, A.V.; Romanenkov, D.A.; Kozlov, Igor E.

doi:10.22449/1573-160x-2017-2-75-83

Cited by 13 publications

(16 citation statements)

References 2 publications

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“…In our study region, the analysis of SAR images reveals that cyclones clearly dominate, comprising about 80% of the detected eddies. A similar percentage of cyclonic eddies has been reported for MIZ eddies along the EGC (Bondevik, 2011) and for open water eddies in the Barents and Kara Seas (Atadzhanova et al, 2017). A slightly lower percentage of cyclones (68%) has been obtained for the Western Arctic Ocean (Kozlov et al, 2019).…”

Section: Journal Of Geophysical Research: Oceanssupporting

confidence: 78%

“…This is more that an order of magnitude higher than in AVISO during the same period but around 4 times less than in FESOM results (plausibly due to the limitations described above in section 2.4.). The largest number of eddies is observed in July 2007 (56%), 28% in August and 16% in September (see also Atadzhanova et al, 2017;Kozlov et al, 2019).…”

Section: Journal Of Geophysical Research: Oceansmentioning

confidence: 98%

“…Eddies are visible in spaceborne SAR images owing to modulation of short-scale sea surface roughness by eddy-induced currents (wave-current interactions), accumulation of slicks or ice floes in the current convergence zones, and due to near-surface wind variation across oceanic fronts (Johannessen et al, 2005;Kozlov et al, 2012Kozlov et al, , 2019Kudryavtsev et al, 2014). The most common method for eddy detection in SAR data is based on visual identification of their surface signatures at relatively small spatial and temporal scales (Atadzhanova et al, 2017;Dokken & Wahl, 1996;Johannessen et al, 1996;Karimova, 2012).…”

Section: Eddy Detection In Sar Imagesmentioning

confidence: 99%

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Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

et al. 2020

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In this study, we investigate eddy dynamics in the northern Greenland Sea and the Fram Strait using AVISO altimetry, spaceborne synthetic aperture radar (SAR), and Finite Element Sea ice‐Ocean Model (FESOM) high‐resolution numerical model data. In the region, eddies are thought to play an important role in the redistribution of the warmer and saltier Atlantic Water between the Arctic Ocean and the areas of deep convection in the central Greenland Sea. We found that eddies detected in AVISO and in SAR form two complementary data sets of large mesoscale eddies (with typical radii of 30–50 km) and of small mesoscale/submesoscale eddies (with typical radii of 1–5 km and not exceeding 30 km), respectively. For large mesoscale eddies, the number of cyclones and anticyclones is approximately the same, while for submesoscale eddies, cyclones are strongly dominating. The limitations and possible biases in each of the data sets are discussed and cross‐validated against FESOM results. It is noted that the most energetic eddies are concentrated along the major currents and in the northern part of the region. Eddy translations follow the mean currents in their overall cyclonic circulation around the northern Greenland Sea. A convergence of the eddies toward the Nordbukta area is detected. On seasonal time scale, a higher number of more intense mesoscale eddies is observed during winter, associated with a quasi‐simultaneous intensification of the mean currents. Model results also show an increase in the number of small eddies in spring‐early summer attributed to the decay of large eddies, while in late autumn, the opposite tendency suggests eddy merger.

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Section: Journal Of Geophysical Research: Oceanssupporting

confidence: 78%

Section: Journal Of Geophysical Research: Oceansmentioning

confidence: 98%

Section: Eddy Detection In Sar Imagesmentioning

confidence: 99%

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Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

et al. 2020

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“…Such eddies are revealed during the polygon surveys in the northwestern Barents Sea and in the region of the Great (Perseus) Bank. Satellite data also permitted to record anticyclonic and cyclonic meanders near the Polar frontal zone [13] and submesoscale eddies in the entire water area [14]. So far, however, there has been no specialized research of the features of the spatial variability of the characteristics of small (submesoscale) eddies in the sea area for several years.…”

mentioning

confidence: 99%

Submesoscale Eddy Structures and Frontal Dynamics in the Barents Sea

Атаджанова¹,

Zimin²,

Svergun³

et al. 2018

PhO

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“…The simulation area is shown in Fig. 1, the quasi-regular grid of the region is constructed on the basis of a spherical coordinate system with the poles selected so that the new equator is the central axis of the Kara Sea, while the horizontal resolution is 3-4 km, which, according to [29], allows reproducing only large mesoscale eddies .…”

Section: The Model Of the Kara Sea And The Eastern Barents Seamentioning

confidence: 99%

Interaction of Dense Shelf Waters of the Barents and Kara Seas with the Eddy Structures

Platov¹,

Golubeva²

2019

PhO

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Considered are the processes of dense bottom water formation in winter in the region of the Novaya Zemlya northwestern coast, its further propagation (cascading) towards the St. Anna trough and then to the open ocean. The goal of the paper is to show that the process of such propagation is closely related to generation of the mesoscale eddies. Methods and Results. The data of available measurements indicate only some residual forms of such a movement, since they cover mainly a summer season. Numerical study was carried out using the system of the nested models SibCIOM and SibPOM. In course of the numerical experiments it became possible to show the system capability in describing the water bottom structure and to reproduce the process of bottom water propagation in details. Analysis of the above-mentioned process has revealed energy conversion of the available potential energy of a regular motion into the potential energy of eddy formations. The eddy structures' ageostrophicity, in its turn, contributes to the accelerated advancement of dense shelf waters downard along the sloping bottom. Conclusions. One of the important features of cascading is that at the initial stage, it is accompanied by active generation of the mesoscale eddy structures. Both processes interact energetically and contribute to increase of heat and mass exchange between the shelf and the open ocean. Proper description of this exchange is a prerequisite for successful modeling of the intermediate and deep water thermodynamics in the Arctic Ocean.

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Satellite Radar Observations of Small Eddies in the White, Barents and Kara Seas

Cited by 13 publications

References 2 publications

Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

Submesoscale Eddy Structures and Frontal Dynamics in the Barents Sea

Interaction of Dense Shelf Waters of the Barents and Kara Seas with the Eddy Structures

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