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Sea Ice Rheology Experiment (SIREx), Part II: Evaluating simulated linear kinematic features in high-resolution sea-ice simulations
  • +14
  • Nils Christian Hutter,
  • Amélie Bouchat,
  • Frederic Dupont,
  • Dmitry S Dukhovskoy,
  • Nikolay V. Koldunov,
  • Younjoo J Lee,
  • Jean-Francois Lemieux,
  • Camille Lique,
  • Martin Losch,
  • Wieslaw Maslowski,
  • Paul G. Myers,
  • Einar Örn Ólason,
  • Pierre Rampal,
  • Till Andreas Soya Rasmussen,
  • Claude Talandier,
  • Bruno Tremblay,
  • Qiang Wang
Nils Christian Hutter
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research

Corresponding Author:[email protected]

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Amélie Bouchat
McGill University
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Frederic Dupont
Environment Canada
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Dmitry S Dukhovskoy
Florida State University
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Nikolay V. Koldunov
Alfred Wegener Institute for Polar and Marine Research
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Younjoo J Lee
Naval Postgraduate School
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Jean-Francois Lemieux
Environnement et Changement Climatique Canada
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Camille Lique
Laboratoire d'Océanographie Physique et Spatiale
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Martin Losch
Alfred Wegener Institute for Polar and Marine Research
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Wieslaw Maslowski
Naval Postgraduate School
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Paul G. Myers
University of Alberta
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Einar Örn Ólason
Nansen Environmental and Remote Sensing Center
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Pierre Rampal
Institut des Geosciences de l'Environnement
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Till Andreas Soya Rasmussen
Danish Meteorological Institute
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Claude Talandier
LPO, CNRS-IFREMER-IRD-UBO
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Bruno Tremblay
McGill University
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Qiang Wang
Alfred Wegener Institute for Polar and Marine Research
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Abstract

Simulating sea-ice drift and deformation in the Arctic Ocean is still a challenge because of the multi-scale interaction of sea-ice floes that compose the Arctic sea ice cover. The Sea Ice Rheology Experiment (SIREx) is a model intercomparison project formed within the Forum of Arctic Modeling and Observational Synthesis (FAMOS) to collect and design skill metrics to evaluate different recently suggested approaches for modeling linear kinematic features (LKFs) and provide guidance for modeling small-scale deformation. In this contribution, spatial and temporal properties of LKFs are assessed in 36 simulations of state-of-the-art sea ice models and compared to deformation features derived from RADARSAT Geophysical Processor System (RGPS). All simulations produce LKFs, but only very few models realistically simulate at least some statistics of LKF properties such as densities, lengths, or growth rates. All SIREx models overestimate the angle of fracture between conjugate pairs of LKFs and LKF lifetimes pointing to inaccurate model physics. The temporal and spatial resolution of a simulation and the spatial resolution of atmospheric forcing affect simulated LKFs as much as the model’s sea ice rheology and numerics. Only in very high resolution simulations (≤2\,km) the concentration and thickness anomalies along LKFs are large enough to affect air-ice-ocean interaction processes.
Apr 2022Published in Journal of Geophysical Research: Oceans volume 127 issue 4. 10.1029/2021JC017666