An ice sheet model ensemble of the last deglaciation in the Ross Sea, Antarctica Trevor R. Hillebrand Abstract: This dataset contains netCDF and makefiles for 52 simulations of past behavior of the Antarctic Ice Sheet from Hillebrand et al. (2020), using the Pennsylvania State University ice sheet model (Pollard and DeConto, 2012). There are two full-continent simulations at 40 km resolution from 125 kyr BP to present, two full-continent simulations at 20 km resolution from 25 kyr BP to present, and 48 nested simulations over the Ross Sea sector at 10 km resolution from 20 kyr BP to present. The 40 km resolution runs provide the initial conditions for the 20 km resolution runs, and the 20 km resolution runs provide initial and boundary conditions for the 10 km resolution runs. These simulations were performed to investigate the relationship between grounding-line retreat and ice thickness at Darwin Glacier (Hillebrand et al., 2020). The model output in the netCDF files can be easily viewed using the ncview tool, or using the code at https://github.com/trhille/PSUICE_analysis for more customized plotting. The file naming convention for each 10km run is: _tau_ocfac_shelf<-log10(basal sliding coeff)>_calv. Files without calv in the filename use a calving factor of 1. LR04 refers to sea level forcing from Lisiecki and Raymo (2005). SPRATT refers to sea level forcing from Spratt and Lisiecki (2016). Each netCDF file contains the following fields: x1: x coordinate, h,v-grids; units = km y1: y coordinate, h,u-grids; units = km x0: x coordinate, u-grid; units=km y0: y coordinate, v-grid; units=km z: z coordinate within ice; units = (ztop-z)/h, 0 to 1 time: time (-=BP, +=AP); units = years vershis: history file version number; no units sealev: sea level, units=m toti: ice volume; units=m^3 totig: grounded ice volume; units=m^3 totif: floating ice volume; m^3 tota: tota ice area, units=m^2 totag: grounded ice area, units=m^2 totaf: floating ice area, units=m^2 alatd:latitude, h-grid, deg N alond:longitude, h-grid, deg E darea: cell area, h-grid, m^2 h: ice thickness, m hb: bed elevation, m hbsd: standard deviation bed elevation, m topbedeq: equilibrium bedrock elevation, m hs: surface elevation, m fedge: ice fractional area, 0–1 deflect: lithospheric deflection, m geoflux: geothermal heat flux, J m^-2 yr^-1 dgeoid: geoid change since start, m budgall: net budget, m yr^-1 budgsnow: snowfall, m yr^-1 budgrain: rainfall, m yr^-1 budgmelt: surface melt, m yr^-1 baseperc: percolation to base, m yr^-1 basefrml: basal freezing rate, m yr^-1 oceanmelt: sub-ice oceanic melt, m yr^-1 facemelt: ice front melt rate, m yr^-1 cliffmelt: cliff ablation rate, m yr^-1 calvice: calving rate, m yr^-1 oceanmeltav: average sub-ice ocean melt, m yr^-1 facemeltav: average ice front melt rate, m yr^-1 cliffmeltav: average cliff ablation rate, m yr^-1 calviceav: average calving rate, m yr^-1 runliqav: average liquid runoff rate, m yr^-1 runfrozav: average solid runoff rate, m yr^-1 maskwater: water or ice/land mask. 0=gd.ice/land, 1=fl.ice/ocean logcrhmel: basal sliding coefficient, m yr^-1 Pa^-2 enhanceinv: extra enhancement (inv) factor for sheet flow, unitless tamax: max monthly air temperature, °C ts: surface temperature, °C tb: basal temperature, °C tbhomol: basal homologous temperature, °C fract: basal non-frozen fraction, 0–1, unitless thickwarm: thickness of basal temperate ice, m was: surface ice z-velocity, m yr^-1 wab: basal ice z-velocity, m yr^-1 fluxsch: grounding-line flux, m^2 yr^-1 utop: surface ice x-velocity, m yr^-1 ubot: basal ice x-velocity, m yr^-1 ua: average ice x-velocity, m yr^-1 vtop: ice y-velocity, m yr^-1 vbot: basal ice y-velocity, m yr^-1 va: average ice y-velocity, m yr^-1 msector: basin sector number, integer References: Hillebrand, T. R., Stone, J. O., Koutnik, M., King, C., Conway, H., Hall, B., Nichols, K., Goehring, B., and Gillespie, M. K.: Holocene thinning and grounding-line retreat of Darwin and Hatherton Glaciers, Antarctica, The Cryosphere Discussions, 1–42, https://doi.org/10.5194/tc-2020-356, 2020. Lisiecki, L. E. and Raymo, M. E.: A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records, Paleoceanography, 20, PA1003, https://doi.org/10.1029/2004PA001071, 2005. Pollard, D. and DeConto, R. M.: Description of a hybrid ice sheet-shelf model, and application to Antarctica, Geosci. Model Dev., 5, 1273–1295, https://doi.org/10.5194/gmd-5-1273-2012, 2012. Spratt, R. M. and Lisiecki, L. E.: A Late Pleistocene sea level stack, 12, 1079–1092, Climate of the Past https://doi.org/10.5194/cp-12-1079-2016, 2016.