Presented by:
Aleksey Marchenko University Centre in Svalbard (UNIS)
Date:
Monday 2nd October 2017 - 16:15 to 17:00
Venue:
INI Seminar Room 1
Abstract:
Presentation will
include an overview of field measurements of waves performed from drift ice in
the Barents Sea since 2006. It includes observations of ice motion during events
of wave propagation, measurements of sea current velocities in under ice
boundary layer, water pressure at different depths, accelerations and angular
velocities of floes. The data are used for the calculation of dispersion
properties of observed waves and characteristics of under ice turbulence. The
coefficient of wave attenuation is calculated using equation of floe motion
along the water surface with relatively common assumptions about floe-floe
interactions and known solution describing oscillating boundary layer near the
bottom of floating ice. Numerical values of the coefficient are reconstructed
using the data of field measurements. The evolution of wave spectra in MIZ of
the North-West Barents Sea is compared with the wave spectra calculated from
the high resolution satellite image (SAR).
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