Interaction of short internal waves with the ice cover in an Arctic fjord

Marchenko, Aleksey; Morozov, E. G.; Музылев, С. В.; Shestov, Aleksey

doi:10.1134/s0001437010010029

Cited by 26 publications

(8 citation statements)

References 3 publications

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“…IWs are known to cause flexure of sea ice (Czipott et al, 1991;Marchenko et al, 2010), and theoretical studies (Muench et al, 1983;Saiki & Mitsudera, 2016) suggest they are responsible for the formation of ice bands in the marginal ice zone. The annual variation of the Arctic ice edge is monitored carefully (i) to assess climate change and (ii) for a variety of practical reasons involving sea traffic, fisheries, offshore operations, and military marine activities.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Experiments on Internal Solitary Waves in Ice‐Covered Waters

Carr

Sutherland

Haase

et al. 2019

Geophysical Research Letters

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Internal solitary waves (ISWs) propagating in a stably stratified two‐layer fluid in which the upper boundary condition changes from open water to ice are studied for grease, level, and nilas ice. The ISW‐induced current at the surface is capable of transporting the ice in the horizontal direction. In the level ice case, the transport speed of, relatively long ice floes, nondimensionalized by the wave speed is linearly dependent on the length of the ice floe nondimensionalized by the wave length. Measures of turbulent kinetic energy dissipation under the ice are comparable to those at the wave density interface. Moreover, in cases where the ice floe protrudes into the pycnocline, interaction with the ice edge can cause the ISW to break or even be destroyed by the process. The results suggest that interaction between ISWs and sea ice may be an important mechanism for dissipation of ISW energy in the Arctic Ocean.

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Section: Introductionmentioning

confidence: 99%

Laboratory Experiments on Internal Solitary Waves in Ice‐Covered Waters

Carr

Sutherland

Haase

et al. 2019

Geophysical Research Letters

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“…Internal waves in Arctic regions have been of recent scientific interest due to their role in vertical mixing, and their influence on the heat budget of the upper ocean and ice cover (Morozov and Pisarev, 2002;Garrett and Kunze, 2007;Morozov et al, 2008Morozov et al, , 2017Guthrie et al, 2013;Rippeth et al, 2017). Several studies of internal waves were conducted in Arctic fjords during ice-free (Svendsen et al, 2002;Støylen and Fer, 2014) and ice covered (Parsmar and Stigebrandt, 1997;Marchenko et al, 2010;Støylen and Weber, 2010;Morozov and Marchenko, 2012) periods. During ice-free periods, internal waves in fjords are forced by changing winds and barotropic tides (Svendsen et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Tidally-generated internal waves in Southeast Hudson Bay

Petrusevich

Dmitrenko

Kozlov

et al. 2018

Continental Shelf Research

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The location of the amphidromic point of the M2 tide in Hudson Bay roughly coincides with Belcher Islands, a region where the surface mixed layer stays relatively fresh throughout summer and winter due to significant ice melt and river discharge. High-resolution satellite radar imagery for the ice-free season revealed that the coastal region in the southeast Belcher Islands is a hot spot for short-period internal wave activity. For a first investigation of tidal dynamics in the region, we took advantage of the sea ice platform to deploy an ice-tethered mooring consisting of nine conductivity and temperature sensors and an acoustic Doppler current profiler. The mooring was deployed at 65 m depth in January-March 2014 in a narrow channel between Broomfield and O′Leary islands located in the southeast tip of the Belcher Islands group in Hudson Bay (56°20′N, 79°30′W), northeast Canada. The surface mixed layer under the land-fast ice in this area stays relatively fresh through winter presumably because of significant winter river discharge in nearby James Bay. The mooring recorded oscillations of temperature and salinity throughout the whole water column, which were attributed to vertical displacement caused by internal tidal waves. The tidal harmonic analysis performed for the M 2 tidal constituent showed the dominance of the baroclinic tide with maximum velocity amplitudes at the surface and decreasing with depth. Vertical displacements of water parcels derived from both temperature and salinity were statistically similar and displayed the maximum values of 11.9 m at 35 m (instrument depth). The combination of winter hydrographic data and summer satellite observations confirmed that the observed internal waves were generated by the interaction of strong tides, typical for Hudson Bay, with highly variable bottom topography southeast of the Belcher Islands archipelago.

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“…Lamb (1997) used weakly nonlinear ISW models to analyze how small particles ( L f ≪ λ , where L f is float length, and λ is wavelength) at the surface would be transported by ISWs. At larger scales relevant to sea ice, horizontal gradients in ISW‐induced vertical velocity has been observed causing the flexure of sea ice in the field (Czipott et al., 1991; Marchenko et al., 2010) and the ice banding effect in the marginal ice zone has also been theoretically attributed to IW activity (Muench et al., 1983; Saiki & Mitsudera, 2016). This indicates that ISWs are capable of inducing movement of sea ice on the order of the ice floe length scales, and here, laboratory experiments are used alongside fully nonlinear models to investigate both small and much larger floating structures.…”

Section: Introductionmentioning

confidence: 99%

Interactions Between Internal Solitary Waves and Sea Ice

Hartharn‐Evans,

Carr,

Stastna

2024

JGR Oceans

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Internal Solitary Waves (ISWs) that form on internal density interfaces in the ocean are responsible for the horizontal transport and vertical mixing of heat, nutrients, and other water properties. The waves also induce fluid motion that can induce stresses and motion on floating structures, such as sea ice. This study investigates ISW‐sea ice interactions. Using laboratory experiments, ISWs generated via the lock gate technique are observed interacting with weighted floats of varying sizes. The motion of these floats can be modeled effectively, simply as the average velocity of the fluid under the float, and it is found that when floats are small relative to the wavelength, they behave in the same manner as a fluid particle, but as floats become bigger relative to the wavelength, the maximum velocity decreases, and interaction time increases. This phenomenon is explained simply by the wave‐induced flow as opposed to energy transfer arguments. By using this model with a large sample of theoretical waves, the float motion is parameterized based on the float length and wave parameters. Whilst small floats do not disrupt the flow patterns, the wave‐induced flow under larger floats forms a pair of counter‐rotating vortices at each end of the float. The formation and evolution of these flow features arise as a result of boundary layer separation with the horizontal wave‐induced flow relative to the float velocity. This reveals complex dynamics due to the non‐stationary behavior of both the float and flow.

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Interaction of short internal waves with the ice cover in an Arctic fjord

Cited by 26 publications

References 3 publications

Laboratory Experiments on Internal Solitary Waves in Ice‐Covered Waters

Laboratory Experiments on Internal Solitary Waves in Ice‐Covered Waters

Tidally-generated internal waves in Southeast Hudson Bay

Interactions Between Internal Solitary Waves and Sea Ice

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