Data set of the hydrostatic regional atmospheric climate model RACMO2.3p2 over Antarctica. At the lateral and ocean boundaries the model is forced by ERA5 reanalysis data every 6 hours from 1979-2021. The model is run at 27 km horizontal resolution for the entire Antarctic ice sheet, which constitutes an update of the simulation forced from 1979-2018 by ERA-Interim reported in van Wessem et al., 2018. Upper air relaxation is also active. To simulate the recent past (1950-2014) and the future (2015-2100) we use RACMO2.3p2 at 27 km resolution to dynamically downscale one historical and three future projections emission scenarios (SSP1-2.6, SSP2-4.5 and SSP5-8.5) of the Coupled Model Intercomparison Project Phase 6 (CMIP6). CESM2 simulates coupled interactions between atmosphere–ocean–land systems on the global scale. The model incorporates the Community Atmosphere Model version 6 (CAM6), the Parallel Ocean Program model version 2.1 (POP2.1) and the Los Alamos National Laboratory Sea Ice Model version 5.1 (CICE5.1). Here, we use a full atmosphere–ocean coupling in CESM2, i.e. including sea ice dynamics and sea surface temperature evolution while excluding land ice dynamics (e.g. calving). The model is run at 1 degree (~100 km) spatial resolution and only prescribes atmospheric greenhouse gas and aerosol emissions as well as land cover use Detailed model description, latest updates Danabasoglu et., al 2020 and evaluation over Greenland are provided in Van Kampenhout et al., 2020. Data set includes: RACMO2.3p2-ERA5-3H - Yearly average precipitation, snowfall, snowmelt and sublimation for the period 1979-2021 in mm w.e per year, and yearly average 2 m temperature in K, forced by 3 hourly ERA5 reanalysis data. RACMO2.3p2-hist_r567 - Yearly average precipitation, snowfall, snowmelt and sublimation for the period 1950-2014 in mm w.e per year, and yearly average 2 m temperature in K, forced by 6 hourly CESM2 historical data. RACMO2.3p2-SSP''126,245,585''_r567 - Yearly average precipitation, snowfall, snowmelt and sublimation for the period 2015-2100 in mm w.e per year, and yearly average 2 m temperature in K, forced by 6 hourly CESM2 future scenario (SSP1-2.6, SSP2-4.5, SSP5-8.5) data. Height_latlon_ANT27.nc - Grids of latitude, longitude, surface elevation (height), land/ice mask (mask2d), grounded land/ice mask (maskgrounded2d), aspect ratio, and surface slope.

{"references": ["Van Wessem, J. M., van de Berg, W. J., No\u00ebl, B. P. Y., van Meijgaard, E., Amory, C., Birnbaum, G., et al. (2018). Modelling the climate and surface mass balance of polar ice sheets using RACMO2 \u2013 Part 2: Antarctica (1979\u20132016). The Cryosphere, 12(4), 1479\u20131498. doi:10.5194/tc-12-1479-2018. issn:1994-0424.", "van Kampenhout, L., Lenaerts, J. T. M., Lipscomb, W. H., Lhermitte, S., No\u00ebl, B., Vizca\u00edno, M., Sacks, W. J., and van den Broeke, M. R. (2020). Present-Day Greenland Ice Sheet Climate and Surface Mass Balance in CESM2. Journal of Geophysical Research: Earth Surface, 125(2), 1\u201325. doi:10.1029/2019JF005318. issn:21699011.", "Danabasoglu, G., Lamarque, J. F., Bacmeister, J., Bailey, D. A., DuVivier, A. K., Edwards, J., et al. (2020). The Community Earth System Model Version 2 (CESM2). Journal of Advances in Modeling Earth Systems, 12(2), 1\u201335. doi:10.1029/2019MS001916. issn:19422466."]}