Internal waves on the Caucasian and Crimean shelves of the Black Sea (according to summer-autumn observations 2011–2016)

  • E. E. Khimchenko Shirshov Institute of Oceanology, Russian Academy of Sciences
  • A. N. Serebryany Shirshov Institute of Oceanology, Russian Academy of Sciences; Andreyev Acoustics Institute JSC
DOI 10.29006/1564-2291.JOR-2018.46(2).7
Keywords inertial internal waves, short-period internal waves, second-mode internal waves, the Black Sea, the shelf of the Crimea and the Caucasus

Abstract

The results of observations of internal waves on the Crimean and Caucasian shelves of the Black Sea conducted between 2011 and 2016 are analyzed and generalized. The measurements were carried out on moored stations equipped with chains of autonomous temperature sensors, as well as by vertical profiling of the water column with the miniSVP probe and the acoustic Doppler current profiler (ADCP). The observed internal waves are compared for three types of shelf: the shallow (Gelendzhik shelf), the shallow (offshore South Coast) and the sharp descent of depths (the Abkhazian shelf). Long-term observations of the field of internal waves on the Black Sea shelf confirm the almost constant presence of internal quasi-inertial oscillations of the thermocline, short-period internal waves with periods from one to tens of minutes are often recorded. On the Black Sea shelf, internal waves of the lower mode predominate, but waves of the second mode also occur. On the shelf with a sharp descent of depths, there are internal waves of maximum heights. Examples of recorded inertial and short-period internal waves are presented. The frequency spectra of internal waves are presented, as well as the statistics of occurrence and the estimation of the intermittency of inertial and short-period internal waves for the three shelf regions.

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Published
2018-11-18
Issue
Vol 46 No 2 (2018): Journal of Oceanological Research
Section
Ocean acoustics

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