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    Seasonal and interannual variability of the Arctic sea ice : a comparison between AO-FVCOM and observations

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    Zhang_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf (9.982Mb)
    Date
    2016-11-25
    Author
    Zhang, Yu  Concept link
    Chen, Changsheng  Concept link
    Beardsley, Robert C.  Concept link
    Gao, Guoping  Concept link
    Qi, Jianhua  Concept link
    Lin, Huichan  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/8758
    As published
    https://doi.org/10.1002/2016JC011841
    DOI
    10.1002/2016JC011841
    Keyword
     AO-FVCOM; Sea ice extent; Sea ice concentration; Sea ice velocity; Sea ice thickness 
    Abstract
    A high-resolution (up to 2 km), unstructured-grid, fully ice-sea coupled Arctic Ocean Finite-Volume Community Ocean Model (AO-FVCOM) was used to simulate the sea ice in the Arctic over the period 1978–2014. The spatial-varying horizontal model resolution was designed to better resolve both topographic and baroclinic dynamics scales over the Arctic slope and narrow straits. The model-simulated sea ice was in good agreement with available observed sea ice extent, concentration, drift velocity and thickness, not only in seasonal and interannual variability but also in spatial distribution. Compared with six other Arctic Ocean models (ECCO2, GSFC, INMOM, ORCA, NAME, and UW), the AO-FVCOM-simulated ice thickness showed a higher mean correlation coefficient of ∼0.63 and a smaller residual with observations. Model-produced ice drift speed and direction errors varied with wind speed: the speed and direction errors increased and decreased as the wind speed increased, respectively. Efforts were made to examine the influences of parameterizations of air-ice external and ice-water interfacial stresses on the model-produced bias. The ice drift direction was more sensitive to air-ice drag coefficients and turning angles than the ice drift speed. Increasing or decreasing either 10% in water-ice drag coefficient or 10° in water-ice turning angle did not show a significant influence on the ice drift velocity simulation results although the sea ice drift speed was more sensitive to these two parameters than the sea ice drift direction. Using the COARE 4.0-derived parameterization of air-water drag coefficient for wind stress did not significantly influence the ice drift velocity simulation.
    Description
    Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 8320–8350, doi:10.1002/2016JC011841.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Geophysical Research: Oceans 121 (2016): 8320–8350
     

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