CHARACTERISTICS OF ANTICYCLONIC EDDY FORMED AT THE PACIFIC COAST OF THE SOUTHERN KURIL ISLANDS IN THE SPRING 1999

Authors

  • G. V. Shevchenko 1. Sakhalin branch of the All-Russian Research Institute of Fisheries and Oceanography; 2. Institute of Marine Geology and Geophysics FEB RAS
  • A. T. Tsoy Sakhalin branch of the All-Russian Research Institute of Fisheries and Oceanography
  • V. N. Chastikov Sakhalin branch of the All-Russian Research Institute of Fisheries and Oceanography

DOI:

https://doi.org/10.29006/1564-2291.JOR-2021.49(2).1

Keywords:

eddy, temperature, salinity, chlorophyll-a, density, South Kuril Islands

Abstract

Based on the analysis of oceanographic survey materials and sea surface temperature satellite observations, the conditions of formation and characteristics of the anticyclonic eddy located in the region of the South Kuril Islands in the spring of 1999 were studied. It was shown that it separated from the subarctic front as result of its interaction with the Oyashio current stream in the second half of March and ceased to exist in mid-June, which is also confirmed by observations of the concentration of chlorophyll-a. In contrast the eddies formed as a result of meandering of the warm Kuroshio and Tsugaru currents, the eddy core, located at depths of 150–300 m, was characterized by lower values of temperature and salinity (4°–4.6°С and 33.55–33.65 е.п.с.) and low current velocities ( about 10 cm/s). The eddy was rather weakly distinguished in the density field both on horizontal and vertical distributions, as well as according to satellite altimetry data.

References


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Published

2021-09-01

Issue

Vol. 49 No. 2 (2021): Journal of Oceanological Research

Section

Ocean physics and climate

License

Transfer of copyrights occurs on the basis of a license agreement between the Author and Shirshov Institute of Oceanology, RAS

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