Simulations of Antarctic Ice Sheet sensitivity to climate and ocean forcing for a suite of Antarctic palaeotopographies

We present steady-state ice thickness, bed elevation, and ice surface elevation output from simulations of the Antarctic Ice Sheet (AIS) on a suite of reconstructed Antarctic palaeotopographies using the DeConto and Pollard (DP16) ice sheet model. Ice surface mass balance inputs were provided using the GENESIS v3.0 global atmosphere general circulation model coupled to a 50 m slab ocean model, which provides boundary meteorology for the RegCM3 regional climate model. Three climate/ocean scenarios were simulated: (1) cold climate orbital parameters, preindustrial CO2 levels (280 ppm) and modern ocean temperatures, (2) a subsequent shift to warm climate orbital parameters, an increase in CO2 levels to 500 ppm, and a 5 deg C ocean temperature rise, and (3) as for (2), but with CO2 levels increased to 840 ppm. The steady-state simulations were performed on a suite of reconstructed Antarctic palaeotopographies pertaining to the following four time slices: (1) the Eocene-Oligocene boundary (EOB; ca. 34 Ma), (2) the Oligocene-Miocene boundary (OMB, ca. 23 Ma), (3) the mid-Miocene (MM; ca. 14 Ma), and (4) the mid-Pliocene (MP; ca. 3.5 Ma). Simulations were performed for minimum, median, and maximum end-member topographies, and equivalent simulations were run on the modern (ice-free) Antarctic bed topography for comparison. Further details are given in the accompanying publication. For more information, please contact G. Paxman.

Funding was provided by NERC Ph.D. studentship NE/L002590/1.

Date (Creation): 2020-10-08

Date (Revision): 2020-10-08

Date (Publication): 2020-10-08

Date (released): 2020-10-08

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/d67a07a8-becc-419d-99f7-5578928461ca

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/01404

Codespace: https://data.bas.ac.uk/

Unique resource identifier: NE/L002590/1

Codespace: award

Other citation details: Please cite this item as: Paxman, G., Gasson, E., Jamieson, S., Bentley, M., & Ferraccioli, F. (2020). Simulations of Antarctic Ice Sheet sensitivity to climate and ocean forcing for a suite of Antarctic palaeotopographies (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/d67a07a8-becc-419d-99f7-5578928461ca

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Durham University	Paxman, Guy		Author
University of Bristol	Gasson, Edward		Author
Durham University	Jamieson, Stewart		Author
Durham University	Bentley, Michael		Author
British Antarctic Survey	Ferraccioli, Fausto		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency: As needed

Maintenance note: Completed

Global Change Master Directory (GCMD) Science Keywords

Theme

Antarctic Ice Sheet
climate change
ice sheet sensitivity
landscape evolution
palaeotopography

Place

Antarctica

GEMET - INSPIRE themes, version 1.0

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DATA REFERENCE

Paxman, G., Gasson, E., Jamieson, S., Bentley, M., & Ferraccioli, F. (2020). Simulations of Antarctic Ice Sheet sensitivity to climate and ocean forcing for a suite of Antarctic palaeotopographies (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/D67A07A8-BECC-419D-99F7-5578928461CA

LITERATURE REFERENCE

Paxman, G. J. G., Gasson, E. G. W., Jamieson, S. S. R., Bentley, M. J., Ferraccioli, F. 2020. Long-term increase in Antarctic Ice Sheet vulnerability driven by bed topography evolution. Geophysical Research Letters (in press).

2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data.

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Language: English

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Climatology, meteorology, atmosphere
Geoscientific information

Supplemental Information: It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication): 2008-11-12

Cited responsible party

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European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

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Hierarchy level: Dataset

Statement: Methodology:

Model output were produced using the DeConto and Pollard (2016) ice sheet model (version DP16).

Data collection:

DeConto and Pollard (2016) ice sheet model (version DP16).

Data quality:

The ice sheet model output reflect quasi-equilibrium conditions and are gridded at 10 km horizontal resolution. The ice sheet model includes parameterisations for the marine ice cliff failure and marine ice shelf hydrofracture processes. Full asynchronous coupling feedback between the regional climate model and the ice sheet model is not performed; the ice sheet extent in the regional climate model was kept constant.

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File identifier: d67a07a8-becc-419d-99f7-5578928461ca XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2020-10-08

Metadata standard name: ISO 19115 Geographic Information - Metadata

Metadata standard version: ISO 19115:2003(E)

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Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact

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