GRISLI 2.0 sensitivity experiments for the Antarctic ice sheet

DOI

Here we present the sensitivity experiments are conducted with the latest GRISLI version 2.0 (Quiquet et al. 2018), to model changes of the Antarctic ice sheet between 100 ka and 400 ka. GRISLI 2.0 is is a large-scale three-dimensional thermomechanical ice sheet model and the newest version of the Grenoble Ice Sheet and Land Ice model (Ritz et al. 2001). The model combines an inland ice model with an ice shelf model, extended to the case of ice streams considered as dragging ice shelves. The latest release includes a better representation of grounding line migration and a sub-glacial hydrology model. The model uses finite differences on a Cartesian grid at 5 to 40 km resolution depending on the application. Here we use a 40 km grid. The spatial coverage of the model experiments is latitude: -90/-54.6602 ; longitude: -180/180. For the selection of the ice sheet model parameters, we used the calibration performed in Quiquet et al. (2018) using the ensemble member labeled AN40T213 in Quiquet et al. (2018). This ensemble member uses the formulation of Tsai et al. (2015) for the imposed flux at the grounding line. The model setup used to perform the transient paleo ice sheet simulations (boundary conditions and forcings) is identical to that used by Quiquet et al. (2018). The model is forced by near-surface air temperatures over Antarctica deduced from the EDC δD record (Jouzel et al. 2007). The GRISLI simulations are performed prescribing three different oceanic forcing indexes: (i) derived from the North Atlantic ODP 980 benthic temperature record (Quiquet et al., 2018; Waelbroeck et al., 2002); (ii) derived from the stacked deep-sea benthic oxygen isotope record (LR04)(Golledge et al., 2014; Lisiecki & Raymo, 2005); and (iii) derived from the EDC δD record (Blasco et al., 2019; Golledge et al., 2014; Jouzel et al., 2007). The outputs of the model consist in the Antarctic ice sheet surface elevation changes, bedrock elevation, and ice thickness variations over the past 400 ka with a 1ka temporal resolution. In addition, we calculated the evolution of the ice volume contained in the Wilkes Basin during the past 400 ka. We performed 27 sensitivity tests in which we changed the initial state of the Antarctic ice sheet (i.e. glacial, interglacial or deglaciated state) at 400 ka. In addition, given that the Southern Ocean forcing represents a large source of uncertainty, for all the simulations at the glacial, interglacial and deglaciated Antarctic initial state, we perform three sensitivity simulations changing the oceanic forcing: the original oceanic and the original forcing increased by 5% and by 10%.

Identifier
DOI https://doi.org/10.1594/PANGAEA.946775
Related Identifier References https://doi.org/10.1038/s41467-022-32847-3
Related Identifier IsDocumentedBy https://doi.org/10.5194/cp-15-121-2019
Related Identifier IsDocumentedBy https://doi.org/10.1038/ncomms6107
Related Identifier IsDocumentedBy https://doi.org/10.1126/science.1141038
Related Identifier IsDocumentedBy https://doi.org/10.1029/2004PA001071
Related Identifier IsDocumentedBy https://doi.org/10.5194/gmd-11-5003-2018
Related Identifier IsDocumentedBy https://doi.org/10.1029/2001JD900232
Related Identifier IsDocumentedBy https://doi.org/10.3189/2015JoG14J221
Related Identifier IsDocumentedBy https://doi.org/10.1016/S0277-3791(01)00101-9
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.946775
Provenance
Creator Crotti, Ilaria ORCID logo; Quiquet, Aurélien ORCID logo; Landais, Amaëlle ORCID logo; Stenni, Barbara ORCID logo; Wilson, David ORCID logo; Severi, Mirko ORCID logo; Mulvaney, Rob; Wilhelms, Frank ORCID logo; Barbante, Carlo ORCID logo; Frezzotti, Massimo ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference European Research Council https://doi.org/10.13039/501100000781 Crossref Funder ID 817493 https://cordis.europa.eu/project/id/817493 ICORDA - Ice CORe DAting tools revisited to infer the dynamic of glacial – interglacial transitions over the last 1.5 million years; Ministry of Education, Universities and Research https://doi.org/10.13039/501100003407 Crossref Funder ID PNRA18_00098 TALDEEP; Natural Environment Research Council https://doi.org/10.13039/501100000270 Crossref Funder ID NE/T011440/1 ISO-THERM: Isotopic testing of Earth's weathering thermostat; SCOR Corporate Foundation for Science https://doi.org/10.13039/100019631 Crossref Funder ID COASTRISK COASTRISK: Assessing future risks faced by assets in global coastal areas, to determine viable adaptation investments under extreme sea level rise scenarios; Università Italo Francese https://doi.org/10.13039/100015564 Crossref Funder ID C2-1017 https://www.universite-franco-italienne.org/menu-principal/appels-a-projets/programme-vinci/ Vinci Scholarship
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 3 data points
Discipline Earth System Research
Spatial Coverage (180.000W, -90.000S, 180.000E, -54.660N)