Drill-site selection for cosmogenic-nuclide exposure dating of the bed of the Greenland Ice Sheet

Direct observations of the size of the Greenland Ice Sheet during Quaternary interglaciations are sparse yet valuable for testing numerical models of ice-sheet history and sea level contribution. Recent measurements of cosmogenic nuclides in bedrock from beneath the Greenland Ice Sheet collected dur...

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Bibliographic Details
Published in:The cryosphere 2022-10, Vol.16 (10), p.3933-3948
Main Authors: Briner, Jason P, Walcott, Caleb K, Schaefer, Joerg M, Young, Nicolás E, MacGregor, Joseph A, Poinar, Kristin, Keisling, Benjamin A, Anandakrishnan, Sridhar, Albert, Mary R, Kuhl, Tanner, Boeckmann, Grant
Format: Article
Language:English
Subjects:
Analysis
Bedrock
Climate change
Cores
Dimensions
Drilling
Fjords
Glaciation
Greenland ice sheet
Ice
Ice caps
Ice cover
Ice sheets
Ice thickness
Industrial locations
Lithology
Mathematical models
Nuclides
Numerical models
Quaternary
Sea level
Sea level measurements
Simulation
Site selection
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Summary:Direct observations of the size of the Greenland Ice Sheet during Quaternary interglaciations are sparse yet valuable for testing numerical models of ice-sheet history and sea level contribution. Recent measurements of cosmogenic nuclides in bedrock from beneath the Greenland Ice Sheet collected during past deep-drilling campaigns reveal that the ice sheet was significantly smaller, and perhaps largely absent, sometime during the past 1.1 million years. These discoveries from decades-old basal samples motivate new, targeted sampling for cosmogenic-nuclide analysis beneath the ice sheet. Current drills available for retrieving bed material from the US Ice Drilling Program require
ISSN:1994-0424
1994-0416
1994-0424
1994-0416
DOI:10.5194/tc-16-3933-2022