On coherent ice drift features in the southern Beaufort sea |
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| Affiliation: | 1. Department of Earth System Science, University of California, Irvine, CA 92697, USA;2. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA;3. Department of Space, National Atmospheric Research Laboratory, Government of India, Tirupati, India;4. Institute Center for Water and Environment (iWATER), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates;5. INRS-ETE, National Institute of Scientific Research, Quebec City, QC G1K9A9, Canada;6. Department of Electronics and Communication Engineering, Sree Narayana Gurukulam College of Engineering, Ernakulam, Kerala, India;7. Department of Physics, Sri Venkateswara University, Tirupati, India;1. Institut National de la Recherche Scientifique (INRS), 490 de la Couronne, Quebec City (QC) G1K 9A9, Canada;2. Intragaz, 6565 boul. Jean XXIII, Trois-Rivières (QC) G9A 5C9, Canada;1. INRS — Centre Eau Terre Environnement 490, rue de la Couronne, Québec G1K 9A9, Québec, Canada;2. Pétrolia Inc., 305 boulevard Charest Est, 10 etage, Québec G1K 3H3, Québec, Canada;1. Institut National de la Recherche Scientifique, Centre Eau, Terre et Environnement (INRS-ETE), 490 de la Couronne, Quebec City, QC, Canada, G1K 9A9;2. Université Laval, Département de Géographie, Faculté de foresterie, de géographie et de géomatique, Pavillon Abitibi-Price, 2405, rue de la Terrasse, Local 3137, Quebec City, QC, Canada, G1V 0A6;3. Defence Research and Development Canada – Valcartier, 2459 Pie-XI Blvd. North, Quebec City, QC, Canada, G3J 1X5 |
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| Abstract: | Previous studies have highlighted reversals in the Beaufort Gyre on regional scales during summer months, and more recently, throughout the annual cycle. In this study we investigate coherent ice drift features associated with individual ice beacons during winter 2008 that may be a signature of ice–coast interactions, atmospheric and/or oceanic forcing. Examined in particular are three case studies associated with reversals in ice beacon trajectories in January and April of 2008; case I corresponds to a meander reversal event in January, case II to a loop reversal event in April, and case III to a meander reversal event located to the northeast of the Mackenzie Canyon in April. An assessment of atmospheric and oceanic conditions during these reversal events shows enhanced ocean–sea-ice–atmosphere dynamical coupling during the Case I meander reversal event in January and comparatively weak coupling during the Case II loop and Case III meander reversal event in April. Absolute (single-particle/beacon) and relative (two-particle/beacon) dispersion results demonstrate dominant meridional ice drift displacement and inter-beacon separation for Case I relative to Cases II and III indicative of ice–ice and ice–coast interactions in January. The results from this investigation provide an ice drift case study analysis relevant to, and template for, high-resolution sea ice dynamic modeling studies essential for safety and hazard assessments of transportation routes and shipping lanes, ice forecasting, and nutrient and contaminant transport by sea ice in the Arctic. |
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| Keywords: | Sea ice dynamics Ice drift reversals Ocean–sea-ice–atmosphere dynamical coupling Lagrangian dispersion statistics IPY case studies in the marginal ice zone (MIZ) of the southern Beaufort Sea |
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