CESM3-HR-ML: Community Earth System Model Version 3 High-Resolution (CESM3-HR) Medium Low Emission Scenario Sea Surface Height Simulation (global, daily) for the 2024-2100 period.

Rationale and Objective: This dataset contains 2D numerical model output of global sea surface height (SSH) under Medium Low-Emission scenario under CMIP7 protocol. The primary objective was to improve the prediction and projection of regional and local sea-level changes using a global eddy resolving (~8 km) implementation of the most recent CESM version 3 (CESM3). By accurately resolving complex coastlines, bathymetry, and regional ocean circulation- such as the Loop Current and its associated eddies in the Gulf of America-, and a direct simulation of barystatic sea level rise with a non-linear free-surface formulation, this model offers significantly higher precision than standard coarse-resolution (~100km) CMIP-class models and prior high-resolution CESM configurations. Furthermore, the availability of a companion high-resolution CMIP7 High, Medium, and Low emission scenarios and CESM Version 1.3 RCP8.5 (UID H5.x992.000:0007), RCP6.0 (UID H5.x992.000:0008), RCP2.6 (UID GA.x344.000:0001) and RCP4.5 (UID GA.x344.000:0001) simulations enable a direct comparison of sea-level responses across different radiative forcing pathways and different CESM versions and CMIP frameworks. Methods and Model Description: Data were produced using a ~8 km version of the Community Earth System Model Version 3 (CESM3-HR) with 75 vertical levels following the Coupled Model Intercomparison Project phase 7 (CMIP7) protocol. Model is initialized in 2024 from a CESM3-HR historical simulation and forced with CMIP7 Medium Low Emission scenario forcings. Time Period and Spatial Extend: The simulation covers the period 2024-2100 and the data is available for the global domain. Dataset Contents: The dataset consists of daily averaged SSH (cm) data on the global grid in muti-year (~10 years) NetCDF files. The file also contains the model grid variables (latitude, longitude, mask, depth and area).