the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Simulated stability of the Atlantic Meridional Overturning Circulation during the Last Glacial Maximum
Frerk Pöppelmeier
Jeemijn Scheen
Aurich Jeltsch-Thömmes
Thomas F. Stocker
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We investigated the influence of several regional climate models on the Antarctic Ice Sheet when applied as forcing for the Parallel Ice Sheet Model (PISM). Our study shows that the choice of regional climate model forcing results in uncertainties of around a tenth of those in future sea level rise projections and also affects the extent of grounding line retreat in West Antarctica.
Related subject area
Scientists study past climate change using proxies (e.g. pollen) and models. Proxies offer detailed snapshots but are limited in number, while models provide broad coverage but at low resolution. Typically, models are downscaled to 30 arc-minutes, but it’s unclear if this is sufficient. We found that increasing models to 5 arc-minutes does not improve their coherence with climate reconstructed from pollen data. Optimal model resolution depends on research needs, balancing detail with error.