Articles | Volume 16, issue 8
https://doi.org/10.5194/tc-16-3033-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-16-3033-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
GBaTSv2: a revised synthesis of the likely basal thermal state of the Greenland Ice Sheet
Joseph A. MacGregor
CORRESPONDING AUTHOR
Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center,
Greenbelt, Maryland, United States of America
Winnie Chu
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, Georgia, United States of America
William T. Colgan
Geological Survey of Denmark and Greenland, Copenhagen, Denmark
Mark A. Fahnestock
Geophysical Institute, University of Alaska Fairbanks, Fairbanks,
Alaska, United States of America
Denis Felikson
Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center,
Greenbelt, Maryland, United States of America
Universities Space Research Association, Columbia, Maryland, United
States of America
Nanna B. Karlsson
Geological Survey of Denmark and Greenland, Copenhagen, Denmark
Sophie M. J. Nowicki
Department of Geology, University at Buffalo, Buffalo, New York,
United States of America
Michael Studinger
Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center,
Greenbelt, Maryland, United States of America
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Cited
11 citations as recorded by crossref.
- Subglacial valleys preserved in the highlands of south and east Greenland record restricted ice extent during past warmer climates G. Paxman et al. 10.5194/tc-18-1467-2024
- Ice acceleration and rotation in the Greenland Ice Sheet interior in recent decades A. Løkkegaard et al. 10.1038/s43247-024-01322-w
- Subglacial lake activity beneath the ablation zone of the Greenland Ice Sheet Y. Fan et al. 10.5194/tc-17-1775-2023
- Evaluating different geothermal heat-flow maps as basal boundary conditions during spin-up of the Greenland ice sheet T. Zhang et al. 10.5194/tc-18-387-2024
- Drill-site selection for cosmogenic-nuclide exposure dating of the bed of the Greenland Ice Sheet J. Briner et al. 10.5194/tc-16-3933-2022
- A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) Y. Fischler et al. 10.5194/gmd-16-5305-2023
- Design and performance of the Hotrod melt-tip ice-drilling system W. Colgan et al. 10.5194/gi-12-121-2023
- Greenland and Canadian Arctic ice temperature profiles database A. Løkkegaard et al. 10.5194/tc-17-3829-2023
- Sixty years of ice form and flow at Camp Century, Greenland W. Colgan et al. 10.1017/jog.2022.112
- Patterns of valley incision beneath the Greenland Ice Sheet revealed using automated mapping and classification G. Paxman 10.1016/j.geomorph.2023.108778
- Episodic Subglacial Drainage Cascades Below the Northeast Greenland Ice Stream J. Andersen et al. 10.1029/2023GL103240
11 citations as recorded by crossref.
- Subglacial valleys preserved in the highlands of south and east Greenland record restricted ice extent during past warmer climates G. Paxman et al. 10.5194/tc-18-1467-2024
- Ice acceleration and rotation in the Greenland Ice Sheet interior in recent decades A. Løkkegaard et al. 10.1038/s43247-024-01322-w
- Subglacial lake activity beneath the ablation zone of the Greenland Ice Sheet Y. Fan et al. 10.5194/tc-17-1775-2023
- Evaluating different geothermal heat-flow maps as basal boundary conditions during spin-up of the Greenland ice sheet T. Zhang et al. 10.5194/tc-18-387-2024
- Drill-site selection for cosmogenic-nuclide exposure dating of the bed of the Greenland Ice Sheet J. Briner et al. 10.5194/tc-16-3933-2022
- A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) Y. Fischler et al. 10.5194/gmd-16-5305-2023
- Design and performance of the Hotrod melt-tip ice-drilling system W. Colgan et al. 10.5194/gi-12-121-2023
- Greenland and Canadian Arctic ice temperature profiles database A. Løkkegaard et al. 10.5194/tc-17-3829-2023
- Sixty years of ice form and flow at Camp Century, Greenland W. Colgan et al. 10.1017/jog.2022.112
- Patterns of valley incision beneath the Greenland Ice Sheet revealed using automated mapping and classification G. Paxman 10.1016/j.geomorph.2023.108778
- Episodic Subglacial Drainage Cascades Below the Northeast Greenland Ice Stream J. Andersen et al. 10.1029/2023GL103240
Latest update: 17 Jul 2024
Short summary
Where the bottom of the Greenland Ice Sheet is frozen and where it is thawed is not well known, yet knowing this state is increasingly important to interpret modern changes in ice flow there. We produced a second synthesis of knowledge of the basal thermal state of the ice sheet using airborne and satellite observations and numerical models. About one-third of the ice sheet’s bed is likely thawed; two-fifths is likely frozen; and the remainder is too uncertain to specify.
Where the bottom of the Greenland Ice Sheet is frozen and where it is thawed is not well known,...