A study of oceanographic conditions in the northwestern Japan Sea in the spring seasons 2000–2017
2018
Nikitin, A.A. | Djakov, B.S. | Каpshiter, A.V. | Nuzhdin, V.A.
Analysis of oceanological conditions in the Japan Sea was carried out by satellite and ship information in May-June 2000–2017. Satellite data is represented by the sea surface images in the infrared and optical bands, and the ship information is represented by deep-sea measurements of temperature and salinity at standard oceanographic cross sections. According to altimetric data, maps of the sea level anomalies were constructed with the aim to identify geostrophic circulation in the springs of the years under study. The joint use of satellite and oceanographic information allowed to execute a three-dimensional analysis of oceanological structures (currents, fronts and their sections, anticyclones and water masses). As a result of this work, the typification of the spring seasons 2000–2017 to three groups — the water thermodynamics, the position of oceanographic structures on satellite maps and on the oceanographic sections was performed. The dominant feature of typification is the water thermal state. It is shown that the water temperature fluctuations can influence the survival rate of walleye pollock in the early stages of ontogeny and the formation of annual classes abundance only indirectly, primarily through biota.
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