Deformation of an ice pack influenced by waves and topographic enhancement of tidal motion near Hopen Island in the Barents Sea

Turnbull, Ian; Marchenko, Aleksey

doi:10.1016/j.coldregions.2021.103463

Cited by 4 publications

(11 citation statements)

References 29 publications

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“…(1994), Kowalik and Proshutinsky (1995), Pease et al. (1995), Turnbull and Marchenko (2022), and Vinje et al. (1989) in the Barents Sea indicated that the primary input to the observed clockwise circular trajectories of the ice was the tidal motion.…”

Section: Comparison Between Ice Floes Movement and Computed Tidal Cur...mentioning

confidence: 96%

“…Such local eddies, when detached, can travel a long distance impacting properties of the Arctic waters (Porter et al., 2020). The various physical mechanisms for the ice pack movement and deformation were analyzed by Turnbull and Marchenko (2022) based on six ice trackers deployed in 2017. The observations to the west‐southwest of Hopen Island helped establish that the topographic enhancement of the tidal currents is the dominant factor in the pack ice redistribution.…”

Section: Hopen Islandmentioning

confidence: 99%

“…At the Spitsbergen Bank domain, the TPXO shows lower current speeds in the shallow water for the semidiurnal tides, while amplification of the diurnal currents at the resonance domains lags behind present computations. Turnbull and Marchenko (2022) compared the speed of the several ice trackers with currents calculated from TPXO near Hopen Island in the Barents Sea and concluded that: “While the TPXO tidal model captures the trend toward enhanced tidal current speeds in shallow water, it still underestimates them as shown by the observed trackers speed.”…”

Section: Higher Resolution Model Comparison To the Field Data And Tpx...mentioning

confidence: 99%

“…To track the surface water motion over the Bank, we made extensive observations of the buoys deployed on the ice floes (Marchenko et al., 2021; Turnbull & Marchenko, 2022), see also Data Availability Statement section. The movements of the buoys are a superposition of tides, the wind‐driven motion, and the slow Hopen‐Spitsbergen Current.…”

Section: Introductionmentioning

confidence: 99%

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Tidal Motion Enhancement on Spitsbergen Bank, Barents Sea

Kowalik

Marchenko²

2023

JGR Oceans

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The higher resolution numerical model investigates the semidiurnal and diurnal tides over the shallow Spitsbergen Bank. The tidal wave is trapped around Bear Island, Hopen Island, and Central Hill at the Bank in the semidiurnal range of oscillations. Semidiurnal waves around Bear and Hopen Islands generate a trapped dipole in the sea level distribution revealed by sea level maximum and minimum traveling on the opposite sides of the island. The dipole induces significant sea‐level differences and amplified velocity around the island perimeter. The role of the tidal currents over the Bank is connected through the mixing and transport to the generation of frontal regions. Tidal mixing directly relates to the local ice formation on Spitsbergen Bank as these areas coincide with the regions of strong tidal currents. The trapping of the semidiurnal tides leads to residual (permanent) circulation of up to 15 cm s−1. As this motion interconnects different bathymetric regions of the Bank, it influences the exchange of properties between these regions. The strength of residual currents shows that the large‐scale slow thermohaline motion cannot be complete without residual tidal motion. The diurnal tides show a different distribution since higher spatial resolution reveals sea‐level variability in many locations. These short‐wavelength shelf waves occur at seamounts, submarine peninsulas, and bays. We investigate in detail the wave dynamics in proximity to Central Hill and Hopen Island. We use observations of the buoys deployed on the ice floes to compare the drift velocity to the computed tidal velocity.

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Section: Comparison Between Ice Floes Movement and Computed Tidal Cur...mentioning

confidence: 96%

Section: Hopen Islandmentioning

confidence: 99%

Section: Higher Resolution Model Comparison To the Field Data And Tpx...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tidal Motion Enhancement on Spitsbergen Bank, Barents Sea

Kowalik

Marchenko²

2023

JGR Oceans

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“…The trackers could float and, therefore, the internal temperature records were used to determine the date and time when they entered water, as the temperature transitioned from a larger diurnal cycle when exposed to air on top of the ice, to a significantly more muted diurnal temperature variation when floating in open water. An analysis of the trackers' internal temperature records and the Svalbard regional daily ice maps from the Norwegian Meteorological Institute Ice Service led to the determination that the beacons most likely began falling into open water sometime on May 2, 2017 64 . The dispersion of the ice floes was dominated by strong shearing within the local ice pack, coinciding with a rapid increase in the speeds of the local tidal currents, which was soon followed by a rapid increase in the wave energy.…”

Section: Data Recordsmentioning

confidence: 99%

A dataset of direct observations of sea ice drift and waves in ice

Rabault¹,

Müller²,

Voermans³

et al. 2022

Preprint

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Variability in sea ice conditions, combined with strong couplings to the atmosphere and the ocean, lead to a broad range of complex sea ice dynamics. More in-situ measurements are needed to better identify the phenomena and mechanisms that govern sea ice growth, drift, and breakup. To this end, we have gathered a dataset of in-situ observations of sea ice drift and waves in ice. A total of 15 deployments were performed over a period of 5 years in both the Arctic and Antarctic, involving 72 instruments. These provide both GPS drift tracks, and measurements of waves in ice. The data can, in turn, be used for tuning sea ice drift models, investigating waves damping by sea ice, and helping calibrate other sea ice measurement techniques, such as satellite based observations.

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