Data set: Yearly RACMO2.3p2 variables, threshold temperature and Sentinel-2 melt pond volume

<p>Data set of yearly regional atmospheric climate model RACMO2.3p2 data 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.&nbsp; Upper air relaxation is also active.<br> 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). Detailed CESM2&nbsp; description and latest updates are provided in Danabasoglu et., al 2020 and an evaluation over Greenland in Van Kampenhout et al., 2020.</p> <p>These data are then used to fit exponential and power-law relations of annual total liquid water production (melt + rain) and snow accumulation (snowfall - sublimation)&nbsp; to calculate MoA sensitivity as a function of annual average 2 m temperature. A comparison with Sentinel-2 melt pond observations can then be performed.</p> <p><strong>Data set includes: </strong></p> <p><strong>RACMO2.3p2-ERA5-3H</strong> - 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.</p> <p><strong>RACMO2.3p2-hist_r567</strong> - 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.</p> <p><strong>RACMO2.3p2-SSP&#39;&#39;126,245,585&#39;&#39;_r567</strong> - 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.</p> <p><strong>TT_ALL.nc </strong>- Antarctic threshold temperature <span class="math-tex">\(T_T\)</span> for MoA = 0.7 as described in the Methods section.</p> <p><strong>dT_ALL.nc </strong>- Uncertainty in Antarctic threshold temperature <span class="math-tex">\(T_T\)</span> for MoA = 0.7 as described in the Methods section.</p> <p><strong>TT_IS.nc </strong>- Antarctic threshold temperature <span class="math-tex">\(T_T\)</span> for MoA = 0.7 of 56 selected ice shelves as described in the Methods section.</p> <p><strong>dT_IS.nc </strong>- Uncertainty in Antarctic threshold temperature <span class="math-tex">\(T_T\)</span> for MoA = 0.7 of 56 selected ice shelves as described in the Methods section.</p> <p><strong>S2_meltpondvolume_v3.nc</strong> - Sentinel-2 melt pond volume as described in the Methods section.</p> <p><strong>Height_latlon_ANT27.nc&nbsp;&nbsp; </strong>- Grids of latitude, longitude, surface elevation (height), land/ice mask (mask2d), grounded land/ice mask (maskgrounded2d), aspect ratio, and surface slope.</p>