MISOMIP2 Ice-Shelf-Ocean Phase 1 OceanA-hind – Model ROMS-UTAS_v1.0

This record contains the output from the MISOMIP OceanA-hind experiment performed with the ROMSIceShelf ocean-ice shelf model configuration (Galton-Fenzi et al., 2024), developed and run at University of Tasmania (UTAS) and Australian Antarctic Division (AAD). The simulation covers the MISOMIP2 Amundsen Sea domain, with an approximate 2km spatial resolution and 31 vertical layers employing a terrain-following vertical coordinate. Bathymetry is sourced from BedMachine v3 (Morlighem et al., 2017). Ice-ocean thermodynamics uses the three-equation parameterisation (Holland & Jenkins, 1999), implemented following Dinniman et al., (2003) and Galton-Fenzi et al., (2012), with vertical mixing captured by the K-Profile Parameterisation (Large, McWilliam and Doney, 1994). The model uses ERA-5 atmospheric forcing (winds), ECCO2 lateral currents, temperature and salinity forcing (Menemenlis et al., 2008), and prescribed sea ice fluxes (Tamura et al., 2012; Nihashi et al., 2015). Subglacial drainage is added as river fluxes with zero salinity at the pressure melting point, and is calculated by the Glacier Drainage System (Werder et al., 2013) following Gladstone et al., (in prep). Tides are prescribed with 10-harmonic (CATS2008) free surface modulation on the lateral boundaries. OceanA-hind outputs are monthly mean outputs in `Oce3d`, `OceSec*` and `OceMoor*` files, calculated by the misomip2 github repository. Dataset takes approximately 16 hours to load and process the raw data, and 32 hours to make the output files (on 1 processor), with a maximum memory use of 500GB. Similar model cofiguration can be found in Gwyther, D. E., Galton-Fenzi, B. K., Blanckensee, S., & Bostock, H. (2025). What controls the formation of Antarctic Bottom Water at Cape Darnley, East Antarctica? Geophysical Research Letters, 52, e2025GL118187. https://doi.org/10.1029/2025GL118187. References: Werder, M. A., Hewitt, I. J., Schoof, C. G., & Flowers, G. E. (2013). Modeling channelized and distributed subglacial drainage in two dimensions. Journal of Geophysical Research: Earth Surface, 118(4), 2140-2158. Nihashi, S., & Ohshima, K. I. (2015). Circumpolar mapping of Antarctic coastal polynyas and landfast sea ice: Relationship and variability. Journal of climate, 28(9), 3650-3670. Tamura, T., Ohshima, K. I., & Nihashi, S. (2008). Mapping of sea ice production for Antarctic coastal polynyas. Geophysical Research Letters, 35(7). Menemenlis, D., Campin, J. M., Heimbach, P., Hill, C., Lee, T., Nguyen, A., ... & Zhang, H. (2008). ECCO2: High resolution global ocean and sea ice data synthesis. Mercator Ocean Quarterly Newsletter, 31(October), 13-21. Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz‐Sabater, J., ... & Thépaut, J. N. (2020). The ERA5 global reanalysis. Quarterly journal of the royal meteorological society, 146(730), 1999-2049. Large, W. G., McWilliams, J. C., & Doney, S. C. (1995). Oceanic vertical mixing: a review and a model with a nonlocal boundary layer parameterization. Oceanographic Literature Review, 7(42), 527. Galton‐Fenzi, B. K., Hunter, J. R., Coleman, R., Marsland, S. J., & Warner, R. C. (2012). Modeling the basal melting and marine ice accretion of the Amery Ice Shelf. Journal of Geophysical Research: Oceans, 117(C9). Dinniman, M. S., Klinck, J. M., & Smith Jr, W. O. (2003). Cross-shelf exchange in a model of the Ross Sea circulation and biogeochemistry. Deep Sea Research Part II: Topical Studies in Oceanography, 50(22-26), 3103-3120. Holland, D. M., & Jenkins, A. (1999). Modeling thermodynamic ice–ocean interactions at the base of an ice shelf. Journal of physical oceanography, 29(8), 1787-1800. Morlighem, M., Williams, C. N., Rignot, E., An, L., Arndt, J. E., Bamber, J. L., ... & Zinglersen, K. B. (2017). BedMachine v3: Complete bed topography and ocean bathymetry mapping of Greenland from multibeam echo sounding combined with mass conservation. Geophysical research letters, 44(21), 11-051. Padman, L., Fricker, H. A., Coleman, R., Howard, S., & Erofeeva, L. (2002). A new tide model for the Antarctic ice shelves and seas. Annals of Glaciology, 34, 247-254. Galton-Fenzi, et al., (2024). [Software] ROMSIceShelf. https://github.com/bkgf/ROMSIceShelf.