статья в журнале

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Ecological Safety of Coastal and Shelf Zones of Sea

ISSN:2413-5577

2024

Зимин, А.В.¹

Романенков, Д.А.¹

Коник, А.А.¹

Свергун, Е.И.¹

Варкентин, А.И.²

Тепнин, О.Б²

VPBEOU

The Pacific Ocean shelf and continental slope off the Kamchatka Peninsula and the Northern Kuril Islands are the area of spawning and early stages of life for some commercial fish species. However, it remains a poorly studied area with a limited set of observational data. In this paper, we perform a comprehensive analysis of heterogeneous satellite observations and global tidal model results over March-August 2015-2021. The work aims to obtain new information on the spatial and temporal variability of the characteristics of different-scale eddy structures and to assess the influence of tidal dynamics on some features of this variability. The following open data archives and atlases are used: Mesoscale Eddy Trajectory Atlas Product Meta3.2 DT, Terra, Aqua/MODIS and VIIRS/Suomi NPP (ocean surface temperature, chlorophyll a), Sentinel-1A/B radar images, NASA SMAP wind, AVISO absolute dynamic topography, TPXO9 tidal currents, CMEMS GLORYS12v1 currents. The paper uses the analysis results to assess the interannual and seasonal variability of the incidence and characteristics of mesoscale and submesoscale eddies and its relation to variations in the East Kamchatka Current and wind regime. The contribution of the tide to the eddy dynamics is shown. As an example, we consider the case of manifestation of small eddies at the periphery of the mesoscale anticyclonic eddy in Avacha Bay. It is shown that the interaction of this anticyclonic structure with tidal currents can serve as an independent mechanism of submesoscale eddy generation. This finding can be extended to the entire study region, which appears to be important for understanding the factors affecting the survival of commercial fishes at early life stages.

ВИХРЬ, АЛЬТИМЕТРИЯ, СПУТНИКОВАЯ РАДИОЛОКАЦИЯ, ОПТИЧЕСКИЙ ДИАПАЗОН, МЕЗОМАСШТАБНЫЕ ВИХРИ, СУБМЕЗОМАСШТАБНЫЕ ВИХРИ, ПРИЛИВ, ТЕЧЕНИЯ, ЗАВИХРЕННОСТЬ, МИНТАЙ, altimetry, currents, eddy, mesoscale eddies, optical range, Pacific Ocean, pollock, radar, submesoscale eddies, tide, vorticity

2025-01-13 13:33:38