Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 45, Issue 9, Pages 4096-4104Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2018GL077511
Keywords
Ice-penetrating radar; Ice cores; Blue ice areas; Ice-flow modeling; Paleoclimate records
Categories
Funding
- U.S. National Science Foundation [PLR-1443260, PLR-1443461]
- National Defense Science and Engineering Graduate Fellowship
- NASA [NNX16AM01G]
- NASA [NNX16AM01G, 900845] Funding Source: Federal RePORTER
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The current ice core record extends back 800,000 years. Geologic and glaciological evidence suggests that the Allan Hills Blue Ice Area, East Antarctica, may preserve a continuous record that extends further back in time. In this study, we use ice-penetrating radar and existing age constraints to map the internal stratigraphy and age structure of the Allan Hills Main Ice Field. The dated isochrones provide constraints for an ice flow model to estimate the age of ice near the bed. Previous drilling in the region recovered stratigraphically disturbed sections of ice up to 2.7 million years old. Our study identifies a site similar to 5 km upstream, which likely preserves a continuous record through Marine Isotope Stage 11 with the possibility that the record extends back 1 million years. Such records would provide new insight into the past climate and glacial history of the Ross Sea Sector.
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