Tidally-generated internal waves in Southeast Hudson Bay

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dc.contributor.authorPetrusevich, Vladislav
dc.contributor.authorDmitrenko, Igor
dc.contributor.authorKozlov, Igor
dc.contributor.authorKirillov, Sergey A.
dc.contributor.authorKuzyk, Zou Zou A.
dc.contributor.authorKomarov, Alexander
dc.contributor.authorHeath, Joel
dc.contributor.authorBarber, David
dc.contributor.authorEhn, Jens
dc.date.accessioned2020-07-17T17:02:02Z
dc.date.available2020-07-17T17:02:02Z
dc.date.issued2018-08-07
dc.date.submitted2020-07-17T17:02:02Zen_US
dc.description.abstractThe 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 south-east 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 65m depth in January–March 2014 in a narrow channel between Broomfield and O′Leary islands located in the south-east 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 M2 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 11.9m at 35m (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.en_US
dc.description.sponsorshipNatural Sciences and Engineering Research Council (NSERC), Canada, Discovery Grant program, the ArcticNet Network of Centres of Excellence, Canada, BaySys (Hudson Bay System Study), Canada, the Nunavut General Monitoring Program to the Arctic Eider Society, Canada, the Canada Excellence Research Chair (CERC), Canada, and Canada Research Chair (CRC), Canadaen_US
dc.identifier.citationPetrusevich, V. Y., Dmitrenko, I. A., Kozlov, I. E., Kirillov, S. A., Kuzyk, Z. Z. A., Komarov, A. S., Heath, J. P., Barber, D. G., Ehn, J. K., 2018. Tidally-generated internal waves in Southeast Hudson Bay. Cont. Shelf Res. 167, 65–76. https://doi.org/10.1016/j.csr.2018.08.002.en_US
dc.identifier.doi10.1016/j.csr.2018.08.002
dc.identifier.urihttp://hdl.handle.net/1993/34786
dc.language.isoengen_US
dc.publisherElsevier Ltd.en_US
dc.rightsopen accessen_US
dc.subjectinternal wavesen_US
dc.subjectsemidiurnal tidesen_US
dc.subjectfreshwater dischargeen_US
dc.subjectwater dynamicsen_US
dc.subjectland-fast sea iceen_US
dc.subjectremote sensingen_US
dc.subjectSAR imagingen_US
dc.subjectHudson Bayen_US
dc.subjectArctic Oceanen_US
dc.titleTidally-generated internal waves in Southeast Hudson Bayen_US
dc.typeTechnical Reporten_US
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