Basal melt rates in equilibrium simulations of the Antarctic ice sheet under pre-industrial, 40 ka, and Last Glacial Maximum ocean conditions using the Parallel Ice Sheet Model (PISM 1.1)


We present basal melt rates for the ice shelves in equilibrium simulations of the Antarctic ice sheet (AIS), using the 3D thermodynamical Parallel Ice Sheet Model (PISM) version 1.1 with PICO as ocean component.The applied climate forcing consists of yearly mean present-day temperature and precipitation fields from RACMO2.3 (RACMO2 ANT27), and 400-800 m depth average ocean temperature and salinity, obtained from simulations using the atmosphere-ocean general circulation model COSMOS (ocean model MPIOM). COSMOS was run using pre-industrial settings (PID; 278 ppm CO2), settings from 40 kyr ago (40ka; 195 ppm CO2), and Last Glacial Maximum settings (LGM; 185 ppm CO2).All simulations are started with present-day bedrock conditions, and a present-day AIS size (Bedmap2). The steady state simulations are conducted by applying the same climate forcing over 200 kyr, after a thermodynamical spin-up (no mass changes) of 200,100 yr.

ID: reference pre-industrial simulation40ka: 40ka simulation with applied sea level change of -64 meter40ka_no_delta_sealevel: 40ka simulation without sea level changeLGM: LGM simulation with applied sea level change of -123 meterLGM_no_delta_sealevel: LGM simulation without sea level change

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Creator Stap, Lennert Bastiaan ORCID logo; Knorr, Gregor ORCID logo; Barker, Stephen ORCID logo; Zhang, Xu ORCID logo; Lohmann, Gerrit (ORCID: 0000-0003-2089-733X); Gong, Xun ORCID logo; Gierz, Paul (ORCID: 0000-0002-4512-087X); Stepanek, Christian ORCID logo
Publisher PANGAEA
Publication Year 2021
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format application/zip
Size 164.5 kBytes
Discipline Earth System Research
Spatial Coverage (0.000 LON, -90.000 LAT)