Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
doi:10.5194/tc-2016-219
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
30 Sep 2016
Review status
A revision of this discussion paper is under review for the journal The Cryosphere (TC).
Characterizing sudden changes in Arctic sea ice drift and deformation on synoptic timescales
Jennifer V. Lukovich1, Cathleen A. Geiger2, and David G. Barber1 1Centre for Earth Observation Science, University of Manitoba, Winnipeg, R3T 2N2, Canada
2College of Earth, Ocean, and Environment: Geography, University of Delaware, Delaware, 19716, USA
Abstract. In this study, we develop a framework for the assessment of sudden changes in sea ice drift and associated deformation processes in response to atmospheric forcing and ice–coastal interactions, based on analysis of ice buoy triplet centroids and areas. Examined in particular is the spatiotemporal evolution in sea ice floes that are tracked with GPS beacons deployed in triplets in the southern Beaufort Sea at varying distances from the coastline in fall, 2009 – triplets A to D, with A (D) located closest to (furthest from) the coastline. This study illustrates the use of shock-response diagnostics to evaluate eight identified sudden changes or shock events on daily timescales. Results from this analysis show that shock events in the southern Beaufort Sea occur in at least one of two forms: (1) during a reversal in winds, or (2) sustained north/easterly winds, with response mechanisms governed by ice conditions and interactions with the coastline. Demonstrated also is the emergence of a shear-shock event (SSE) that results in reduced ice concentrations for triplets B, C, and D, one, three and five days following the SSE, respectively and loss of synchronicity in ice-atmosphere interactions. The tools developed in this study provide a unique characterization of sea ice dynamical processes in the southern Beaufort Sea, with implications for quantifying "shock-response" systems relevant for ice hazard assessments and forecasting applications required by oil and gas, marine transportation, and indigenous use of near shore Arctic areas.

Citation: Lukovich, J. V., Geiger, C. A., and Barber, D. G.: Characterizing sudden changes in Arctic sea ice drift and deformation on synoptic timescales, The Cryosphere Discuss., doi:10.5194/tc-2016-219, in review, 2016.
Jennifer V. Lukovich et al.
Jennifer V. Lukovich et al.
Jennifer V. Lukovich et al.

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In this study we provide a unique characterization of sea ice dynamics based on analysis of ice buoys deployed in a triangular configuration in the Beaufort Sea. An assessment of changes in sea ice drift paths and associated deformation processes captures shock events in response to atmospheric forcing and ice-coast interactions. The importance of this work exists in the development of diagnostics relevant for ice hazard assessments and forecasting required by indigenous communities and industry
In this study we provide a unique characterization of sea ice dynamics based on analysis of ice...
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