Ensemble of ice shelf basal melt rates and ocean properties for tipped-over continental shelves

• Main Authors: Haid, Verena, Timmermann, Ralph, Mathiot, Pierre, Jourdain, Nicolas, Hellmer, Hartmut
• Format: Dataset
• Language: English
• Published: 2021
• Subjects: Tipping point; Antarctica; Ice shelf; Southern Ocean; Amundsen Sea; Ronne Ice Shelf; Ross Ice Shelf; Antarc*; Filchner Ronne Ice Shelf; Filchner-Ronne Ice Shelf; Ice Sheet; Ice Shelf; Sea ice
• Online Access: https://zenodo.org/record/5120376; https://doi.org/10.5281/zenodo.5120376

Summary: This dataset contains the reference and tipped states from several model configurations developed at the Alfred Wegener Institute (AWI) and the Institut des Géosciences de l’Environnement (IGE). They were gathered here in the context of the TiPACCs European project and constitute a useful ensemble of reference and tipped ocean–ice-shelf simulations that can be used to feed ice-sheet simulations or to train melt parameterizations. The simulations produced by AWI are based on the FESOM global ocean–sea-ice model using either Z- or Sigma- coordinates and all show a cold-to-warm tipping point for Filchner-Ronne Ice Shelf. The two sets of simulations produced by IGE are based on the NEMO ocean–sea-ice model. They include a global configuration showing a cold-to-warm tipping point for Ross Ice Shelf, and regional Amundsen Sea configuration showing a warm-to-warmer transition (likely not a proper tipping point). The files include 3-dimensional and sea-floor ocean temperatures and salinities, ice-shelf melt rates, as well as topographic and grid data. All variables are interpolated onto the common 8km stereographic grid that was used to provide ocean forcing in ISMIP6 (Nowicki et al. 2020). We provide the reference state and the anomaly, so that the tipped state is: Tipped = Reference + Anomaly To have an overview of the reference and tipped states, have a look at these figures: figure_ref_and_anomalies_1.pdf figure_ref_and_anomalies_2.pdf figure_seafloor_temp_zooms.pdf _______________________________________________ Detailed Data Description: reference_high_FESOM_sigma_AWI_TiPACCs.nc contact: Ralph Timmermann [e-mail], Verena Haid [e-mail] model: FESOM1.4, sigma-coordinates (global with refined grid around Antarctica) atmospheric forcing: HadCM3 20C provided average: 1990-1999 (10-year mean) more: Timmermann and Hellmer (2013) reference_low_FESOM_sigma_AWI_TiPACCs.nc contact: Ralph Timmermann [e-mail], Verena Haid [e-mail] model: FESOM1.4, sigma-coordinates ...