Data for calibrating sub-ice-shelf melt parameterisations for ISMIP7 Antarctic experiments: ocean model output, hydrographic observations, observational estimates of melt rates, buttressing flux response numbers, drainage basins and ice-shelf masks, and the meltMIP intercomparison inputs. Third-party model output and observations from several groups, each with its own citation and licence — see the per-dataset attribution in the product README.
Hydrographic sections of the Amundsen Sea for thirteen years between 1994 and 2020
(Obs_YEAR_T.nc, _S.nc, _TF.nc: temperature, salinity, thermal forcing), on the
ISMIP7 8 km / 60 m grid, and the calibration target derived from them
(melt_observations_target_term4.nc).
The files were renamed from Dutrieux_ismip8km_60m_* to Obs_YEAR_* on 31 July 2026.
The sections are the Amundsen Sea observations compiled for MISOMIP2 MIPkit-A (De Rydt et al., 2024) by Pierre Dutrieux, gridded onto the ISMIP7 grid by the ISMIP7 AIS ocean focus group. From the MIPkit-A description:
The hydrographic properties provided on horizontal sections at 15 depths come from the CTD measurements obtained during cruises of the following icebreaker research vessels: Nathaniel B. Palmer (United States Antarctic Program), James C. Ross (British Antarctic Survey and Natural Environment Research Council), Araon (Korea Polar Research Institute), Oden (Swedish Polar Research) and Polarstern (Alfred Wegener Institute, Germany). In this MIPkit, we have gathered data for the first months of 1994, 2000, 2007, 2009 (Jacobs, 1994, 2000, 2007, 2009), 2010 (Swedish Polar Research Secretariat 2010; Gohl 2015), 2012 (Kim et al. 2012), 2014 (Heywood 2014; Ha et al. 2014), 2016 (Kim et al. 2016), 2017 (Gohl 2017), 2018 (Kim et al. 2018), 2019 (Larter et al. 2019) and 2020 (Wellner, 2020).
The underlying cruise data come from several institutes, some of it never formally published, and no single licence covers the compilation, so none is attached here: please treat these files as a convenience for calibration and cite the cruises and papers below for anything you publish. The cruise DOIs are cited in De Rydt et al. (2024) wherever one exists. The same observations are shown in Dutrieux et al. (2014), Jenkins et al. (2018) and Joughin et al. (2021).