MISOMIP2 Ice-Shelf-Ocean Phase 1 Ocean-hind - Model UCLA-UMD_MITgcm_a

This record contains UCLA-UMD MITgcm output prepared for the MISOMIP2 OceanA-hind and OceanW-hind experiments. The files provide monthly fields for the period 1993-01 to 2019-01, interpolated and packaged on the MISOMIP2 target grids for the Amundsen Sea and Weddell Sea regions. The source simulation is `llc270_icb_ref`, a Southern Ocean MITgcm configuration based on the LLC270 grid and described by Moorman et al. (2026). The model uses RTopo-2 bathymetry and ice-shelf draft, ERA-Interim atmospheric forcing, prescribed climatological iceberg meltwater fluxes, dynamic-thermodynamic MITgcm sea ice, the MITgcm SHELFICE package, and no tides. The model uses geopotential z-levels with partial cells, r-star, and a nonlinear free surface. The dataset follows the file naming, dimensions, variables, attributes, and interpolation conventions of the MISOMIP2 protocol. OceanA-hind and OceanW-hind outputs include the `Oce3d`, `OceSec*`, and `OceMoor*` product families required by the ocean hindcast protocol. The files were generated with the MISOMIP2 packaging workflow from native MITgcm monthly diagnostics and checked with the MISOMIP2 validation scripts before upload. Acknowledgements: This work used the Advanced Cyberinfrastructure Coordination Ecosystem: Services & Support (ACCESS) program, including Purdue University's Anvil cluster, which is supported by National Science Foundation grants 2138259, 2138286, 2138307, 2137603, and 2138296. This work also used the Hoffman2 Cluster, which is supported by the IDRE Research Technology Group at UCLA. The authors thank the MITgcm team for their contribution to numerical modeling and for making their code available. This work was supported by the National Science Foundation under award numbers OCE-1751386 and OPP-2023244. References: - Asay-Davis, X. S., Jourdain, N. C., and Nakayama, Y. et al. (2024): Experimental protocol for the second phase of the Marine Ice Sheet-Ocean Model Intercomparison Project (MISOMIP2), Geosci. Model Dev., 17, 7105-7139, doi:10.5194/gmd-17-7105-2024.- Moorman, R., Thompson, A. F., Youngs, M. K., and Stewart, A. L. (2026): The Antarctic coastal ocean heat budget is dominated by heat loss to land ice melt, Science Advances, 12, eaec7443, doi:10.1126/sciadv.aec7443. Additional forcing, geometry, and parameterization references are provided in the NetCDF global metadata.