SELF-EXCITED OSCILLATIONS IN THE DRIFTING ICE COVER OF THE ARCTIC OCEAN

Authors

  • V. N. Smirnov Arctic and Antarctic Research Institute
  • S. M. Kovalev Arctic and Antarctic Research Institute
  • A. A. Nubom Arctic and Antarctic Research Institute

DOI:

https://doi.org/10.29006/1564-2291.JOR-2019.47(3).11

Keywords:

sea drifting ice, compression, fractures, self-excited oscillations, horizontally polarized waves, phenomenological model

Abstract

During the monitoring of physical-mechanical state of the ice cover of the Arctic Ocean a wide spectrum of oscillation and wave processes was in the system ice-water studied. The investigations were carried out on the drifting stations “North Pole” with seismometers and tiltmeters. Vertical and horizontal displacements in the ice field characterize parameters of wave processes caused by compression and ridging of ice-mechanical self-excited oscillations. Mechanics of appearance and propagation of waves can be considered with an account of elastic-viscous properties of the ice cover. A phenomenological model is considered of appearance of periodic horizontal displacements on an extensive rupture in a continuous ice cover. At the fault of stresses on the rupture elastic horizontally polarized waves are emitted.

References


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Published

2019-11-06

Issue

Vol. 47 No. 3 (2019): Journal of Oceanological Research

Section

Dedicated to the 90th anniversary of Prof. K.N. Fedorov Ocean physics

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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