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 precipit...

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Bibliographic Details
Main Authors: Stap, Lennert Bastiaan, Knorr, Gregor, Barker, Stephen, Zhang, Xu, Lohmann, Gerrit, Gong, Xun, Gierz, Paul, Stepanek, Christian
Format: Dataset
Language:English
Published: PANGAEA 2021
Subjects:
40ka
Antarctica
Antarctic Ice Sheet
Basal melt rates
Glacial climate
Last Glacial Maximum
pre-industrial
Antarctic
The Antarctic
Antarc*
Ice Sheet
Ice Shelves
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.927126
https://doi.org/10.1594/PANGAEA.927126
Description
Summary: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.

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