FN Archimer Export Format
PT J
TI Sea Ice Rheology Experiment (SIREx): 2. Evaluating Linear Kinematic Features in High-Resolution Sea Ice Simulations
BT 
AF Hutter, Nils
   Bouchat, Amélie
   Dupont, Frédéric
   Dukhovskoy, Dmitry
   Koldunov, Nikolay
   Lee, Younjoo
   Lemieux, Jean‐François
   Lique, Camille
   Losch, Martin
   Maslowski, Wieslaw
   Myers, Paul G.
   Ólason, Einar
   Rampal, Pierre
   Rasmussen, Till
   Talandier, Claude
   Tremblay, Bruno
   Wang, Qiang
AS 1:1;2:2;3:3;4:4;5:1;6:5;7:6;8:7;9:1;10:5;11:8;12:9;13:10;14:11;15:12;16:2;17:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:PDG-ODE-LOPS-OH;9:;10:;11:;12:;13:;14:;15:;16:;17:;
C1 Alfred‐Wegener‐Institut Helmholtz Zentrum für Polar‐ und Meeresforschung Bremerhaven, Germany
   Department of Atmospheric and Oceanic Sciences McGill University,Montréal QC, Canada
   Service Météorologique Canadien Environnement et Changement Climatique Canada Dorval Qc ,Canada
   Center for Ocean‐Atmospheric Prediction Studies Florida State University Tallahassee FL ,USA
   Department of Oceanography Naval Postgraduate School Monterey California, USA
   Recherche en Prévision Numérique Environnementale Environnement et Changement Climatique Canada Dorval Qc ,Canada
   University of Brest CNRS IRD Ifremer Laboratoire d’Océanographie Physique et Spatiale (LOPS) IUEM Brest ,France
   Department of Earth and Atmospheric Sciences University of Alberta Edmonton Alberta, Canada
   Nansen Environmental and Remote Sensing Centre and Bjerknes Centre for Climate Research Bergen ,Norway
   Institut de Géophysique de l’Environnement CNRS Grenoble, France
   Danish Meteorological Institute Copenhagen ,Denmark
   University of Brest CNRS IRD Ifremer Laboratoire d’Océanographie Physique et Spatiale (LOPS) IUEM Brest ,France
C2 INST A WEGENER, GERMANY
   UNIV MCGILL, CANADA
   ENVIRONM & CLIMATE CHANGE CANADA, CANADA
   UNIV FLORIDA STATE, USA
   NAVAL POSTGRAD SCH, USA
   ENVIRONM & CLIMATE CHANGE CANADA, CANADA
   IFREMER, FRANCE
   UNIV ALBERTA, CANADA
   NANSEN CTR, NORWAY
   CNRS, FRANCE
   DANISH METEOROL INST, DENMARK
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-int-hors-europe
IF 3.6
TC 12
UR https://archimer.ifremer.fr/doc/00757/86878/92380.pdf
LA English
DT Article
DE ;Sea Ice Deformation;rheology;model intercomparison project;linear kinematic features;sea ice modeling;sea ice observations
AB 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 of the Forum of Arctic Modeling and Observational Synthesis (FAMOS). In SIREx, skill metrics are designed to evaluate different recently suggested approaches for modeling linear kinematic features (LKFs) to provide guidance for modeling small-scale deformation. These LKFs are narrow bands of localized deformation that can be observed in satellite images and also form in high resolution sea ice simulations. 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 boundary condition 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. Plain Language Summary Winds and ocean currents continuously move and deform the sea-ice cover of the Arctic ocean. The deformation eventually breaks an initially closed ice cover into many individual floes, piles up floes, and creates open water. The distribution of ice floes and open water between them is important for climate research, because ice reflects more light and energy back to the atmosphere than open water, so that less ice and more open water leads to warmer oceans. Current climate models cannot simulate sea ice as individual floes. Instead, a variety of methods is used to represent the movement and deformation of the sea-ice cover. The Sea Ice Rheology Experiment (SIREx) compares these different methods and assesses the deformation of sea ice in 36 numerical simulations. We identify and track deformation features in the ice cover, which are distinct narrow areas where the ice is breaking or piling up. Comparing specific spatial and temporal properties of these features, for example, the different amounts of fractured ice in specific regions, or the duration of individual deformation events, to satellite observations provides information about the realism of the simulations. From this comparison, we can learn how to improve sea-ice models for more realistic simulations of sea-ice deformation. 
PY 2022
PD APR
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU American Geophysical Union (AGU)
VL 127
IS 4
UT 000786295200001
DI 10.1029/2021JC017666
ID 86878
ER

EF