Arctic | Climate and Oceanography
Arctic ice-ocean circulation modeling: Recent improvements and applications Presenter: Katherine Hedstrom , kshedstrom@alaska.edu, UAF/CFOS Robert Hallberg , Robert.Hallberg@noaa.gov, NOAA-GFDL Seth Danielson , sldanielson@alaska.edu, University of Alaska Fairbanks, College of Fisheries and Ocean Sciences Enrique Curchitser , enrique@esm.rutgers.edu, Rutgers University Andrew Mahoney , armahoney@alaska.edu, University of Alaska Fairbanks Regional numerical modeling provides a valuable means to assess important aspects of natural systems when the cost and effort of direct observation is impractical; the Arctic Ocean and its marginal seas and archipelagos represent a domain where such applications abound. We describe the configuration of and results from a set of coupled sea-ice ocean circulation models that are based on MOM6 and SIS2, with ice ridging from the Icepack library. The model domain encompasses not only the Gulf of Alaska and the Bering Sea, but also all of Hudson Bay and Greenland at a resolution of ~12 km. A main focus of this modeling effort is to update our treatment of the landfast ice. We have brought the Lemieux [2015] and Dupont [2021] parameterizations into SIS2, providing a vast improvement over the prior version of SIS2. Our goal is to see if we can get the models to more closely match the observations of landfast ice extent across the Arctic, and its variations in time. We will describe what is working in this model configuration, and what aspects need further attention.
Alaska Marine Science Symposium 2023 119
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