Barents Sea tidal and inertial motions from Argos ice buoys during the Coordinated Eastern Arctic Experiment

Pease, Carol H.; Turet, Philip; Pritchard, Robert S.

doi:10.1029/95jc03014

Cited by 27 publications

(27 citation statements)

References 9 publications

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“…Previous studies of pack ice forcing tend to focus on the Arctic Basin [e.g., Steele et al ., ; Mitchell , ], the response of sea ice dynamics specifically to wind forcing [e.g., Bitz et al ., ; Rabinovich et al ., ; Zhang et al ., ], decadal‐scale climatological analyses of trends in wind and ocean current‐driven ice dynamics in the High Arctic [e.g., Zhang et al ., ; Spreen et al ., ; Petty et al ., ], and shorter‐scale (days to weeks) analyses of tidally driven ice dynamics [e.g., Turet et al ., ; Pease et al ., ]. Historical studies of internal ice stress tend to rely on direct measurements at points within an ice floe [e.g., Prinsenberg et al ., , 1998] or along the edges of floes at specific points of contact with a vessel hull [e.g., Kwon et al ., ] rather than estimate average stress gradients over an entire floe.…”

Section: Introductionmentioning

confidence: 99%

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Relative influences of the metocean forcings on the drifting ice pack and estimation of internal ice stress gradients in the Labrador Sea

2017

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Understanding the relative influences of the metocean forcings on the drift of sea ice floes is a crucial component to the overall characterization of an ice environment and to developing an understanding of the factors controlling the ice dynamics. In addition, estimating the magnitude of the internal stress gradients on drifting sea ice floes generated by surrounding ice cover is important for modeling operations, informing the design of offshore structures and vessels in ice environments, and for the proper calibration of Discrete Element Models (DEM) of fields of drifting ice floes. In the spring of 2015 and 2016, four sea ice floes offshore Makkovik, Labrador were tagged with satellite‐linked ice tracking buoys along with one satellite‐linked weather station on each floe to transmit wind speed and direction. Twenty satellite‐linked Lagrangian surface ocean current tracking buoys were also deployed in the open water adjacent to the targeted ice floes. In this paper, the dynamics of the four ice floes are explored in terms of the relative proportions which were forced by the wind, current, sea surface topography, Coriolis, and internal stress gradients. The internal ice stress gradients are calculated as residuals between the observed accelerations of the floes as measured by the tracking buoys and the sums of the other metocean forcings. Results show that internal ice stress gradients accounted for up to 50% of the observed forcing on the floes, and may have reached up to around 0.19 kPa.

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Section: Introductionmentioning

confidence: 99%

“…The studies of Turet et al ., [] and Pease et al ., [] applied harmonics analysis to drift trajectories of multiyear ice (MYI) tracked by Argos buoys in the eastern Arctic Ocean and Barents Sea during 1988–1989. The buoys were deployed as part of the Coordinated Eastern Arctic Experiment (CEAREX).…”

Section: Introductionmentioning

confidence: 99%

Relative influences of the metocean forcings on the drifting ice pack and estimation of internal ice stress gradients in the Labrador Sea

2017

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“…Ice beacons have been commonly used to map the spatial variability of sea-ice motion (Peterson and Prinsenburg, 1989;Overland, 1985;Pease, 1995). However, the cost of the instrumentation, satellite communications and helicopter deployment limits the number of beacons that can be deployed in large areas of study.…”

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confidence: 99%

Validation and production of RADARSAT‐1 derived ice‐motion maps in the North Water (NOW) polynya, January ‐ December 1998

Wilson¹,

Barber

King

2001

Atmosphere-Ocean

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Monitoring ice motion may provide insight into the atmospheric and oceanic forces acting on ice motion and thus the mechanisms that contribute to polynya dynamics. A study of ice kinematics in the North Water (NOW) region was performed using time sequential and spatially overlapping RADARSAT-1 ScanSAR Wide images (January to December 1998) processed by the Canadian Ice Service (CIS) Ice Tracking Algorithm (Tracker). The objectives of this research were to: 1) validate the NOW region ice motions derived using Tracker; 2) create monthly image-maps that present ice speeds and directions over the NOW region for an entire year (January to December 1998); 3) compare these results to previous ice motion studies done in the NOW region; and 4) develop initial insights into relations between derived ice motion and latent and sensible heat mechanisms in the NOW Polynya. Tracker ice motions were validated using in situ ice beacons deployed between April and November 1998. Tracker magnitude and direction coefficients of determination (R 2 ) were 0.93 and 0.79 respectively, with standard errors of estimate of 3.6 km in magnitude and 38.8° in direction. The monthly ice motion maps describe the annual evolution of the polynya quite accurately and compare well to other studies. High levels of ice export are found which supports the theory that winds or ocean currents continually remove ice from the polynya as it forms. A northward import of ice into the polynya along the Greenland coast shows the recycling of ice into the polynya. Evidence of oceanic (sensible) heat contributing to the open water of the polynya was not evident using the Tracker ice motion methods. RÉSUMÉ [Traduit par la rédaction] La surveillance du mouvement des glaces peut donner un aperçu des forces atmosphériques et océaniques qui déterminent le mouvement des glaces et donc des mécanismes qui participent à la dynamique de la polynie. Une étude de la dynamique des glaces a été réalisée dans la région de la polynie des eaux du Nord à l'aide d'une séquence temporelle d'images qui se chevauchent dans l'espace. Ces images, de type ScanSAR Large, ont été produites de janvier à décembre 1998 par RADARSAT-1 et traitées par l'algorithme de poursuite des glaces (Tracker) du Centre canadien des glaces (CCG). L'étude avait pour objectifs : 1) de valider le mouvement des glaces dérivé par le Tracker dans la région de la polynie des eaux du Nord; 2) de créer des cartes-images mensuelles des vitesses et des directions des glaces dans cette région pour toute l'année (de janvier à décembre 1998); 3) de comparer ces résultats aux études précédentes sur le mouvement des glaces faites dans la région; et 4) de donner une première idée des relations qui existent entre le mouvement dérivé des glaces et les mécanismes de chaleur latente et sensible dans la polynie des eaux du Nord. Les mouvements des glaces donnés par le Tracker ont été validés par des balises à glace déployées sur place entre avril et novembre 1998. Les coefficients de détermination (R 2 ) de la grandeur et de la...

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“…Tidal mixing and stirring are especially strong along the Eurasian Shelf. In the Barents Sea, strong tidal currents are observed around Spitsbergenbanken, Bear and Hopen Islands [ Huthnance , 1981; Nilsen et al , 1990; Pease et al , 1995; KP]. At the entrance to the White Sea, the tidal currents are often up to 200 cm/s.…”

Section: Introductionmentioning

confidence: 99%

A new high‐resolution unstructured grid finite volume Arctic Ocean model (AO‐FVCOM): An application for tidal studies

Chen¹,

Gao²,

Qi³

et al. 2009

J. Geophys. Res.

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A spherical coordinate version of the unstructured grid 3‐D FVCOM (finite volume coastal ocean model) has been applied to the Arctic Ocean to simulate tides with a horizontal resolution ranging from 1 km in the near‐coastal areas to 15 km in the deep ocean. By accurately resolving the irregular coastlines and bathymetry in the Arctic Ocean coastal regions, this model reproduces the diurnal (K1 and O1) and semidiurnal (M2 and S2) tidal wave dynamics and captures the complex tidal structure along the coast, particularly in the narrow straits of the Canadian Archipelago. The simulated tidal parameters (harmonic constituents of sea surface elevation and currents) agree well with the available observational data. High‐resolution meshes over the continental shelf and slope capture the detailed spatial structure of topographic trapped shelf waves, which are quite energetic along the Greenland, Siberia, and Spitsbergen continental slope and shelf break areas. Water stratification influences the vertical distribution of tidal currents but not the water transport and thus tidal elevation. The comparison with previous finite difference models suggests that horizontal resolution and geometric fitting are two prerequisites to simulate realistically the tidal energy flux in the Arctic Ocean, particularly in the Canadian Archipelago.

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Barents Sea tidal and inertial motions from Argos ice buoys during the Coordinated Eastern Arctic Experiment

Cited by 27 publications

References 9 publications

Relative influences of the metocean forcings on the drifting ice pack and estimation of internal ice stress gradients in the Labrador Sea

Relative influences of the metocean forcings on the drifting ice pack and estimation of internal ice stress gradients in the Labrador Sea

Validation and production of RADARSAT‐1 derived ice‐motion maps in the North Water (NOW) polynya, January ‐ December 1998

A new high‐resolution unstructured grid finite volume Arctic Ocean model (AO‐FVCOM): An application for tidal studies

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