Arctic ice/ocean interactions and feedbacks in two mesoscale ocean/sea-ice simulations ...

• Main Authors: McClean, Julie, Dukhovskoy, Dmitry, Fine, Elizabeth, Chassignet, Eric, Wallcraft, Alan, Douglass, Elizabeth
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic; Sea ice
• Online Access: https://dx.doi.org/10.57757/iugg23-2961; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018939

<!--!introduction!--> The Pan-Arctic has experienced accelerated warming over past decades resulting in enhanced loss of sea-ice. Previously ice-covered surface waters are now directly subject to atmospheric conditions (e. g., heating and wind mixing). We use two mesoscale-resolving atmospheric reanalysis forced ocean/sea-ice simulations to examine ocean/sea-ice feedbacks resulting from these changes. One model uses the Parallel Ocean Program 2 (POP2) coupled to CICE5 on an ultra-high resolution global grid (8 km at the equator to 2 km at the poles - UH8to2) while in the other, the Hybrid Coordinate Ocean Model (HYCOM) is coupled to CICE5 on a regional Arctic 1/25º domain (04HYCICE). Both are forced with Japanese 55-year Reanalysis-driving ocean (JRA55-do) and were initialized from a data assimilative global 1/25º ocean/sea-ice state. Near-present (2017-2020) distributions of seasonal sea-ice thickness and concentration are realistically reproduced by both models but with low biases in thickness in the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...