Widespread collapse of the Ross Ice Shelf during the late Holocene
The Ross Sea is a major drainage basin for the Antarctic Ice Sheet and contains the world’s largest ice shelf. Newly acquired swath bathymetry data and sediment cores provide evidence for two episodes of ice-shelf collapse. Two novel geochemical proxies, compound specific radiocarbon dating and radi...
Published in: | Proceedings of the National Academy of Sciences |
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Main Authors: | , , , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
National Academy of Sciences
2016
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Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4780607/ http://www.ncbi.nlm.nih.gov/pubmed/26884201 https://doi.org/10.1073/pnas.1516908113 |
Summary: | The Ross Sea is a major drainage basin for the Antarctic Ice Sheet and contains the world’s largest ice shelf. Newly acquired swath bathymetry data and sediment cores provide evidence for two episodes of ice-shelf collapse. Two novel geochemical proxies, compound specific radiocarbon dating and radiogenic beryllium (10Be), constrain the timing of the most recent and widespread (∼280,000 km2) breakup as having occurred in the late Holocene. Three-dimensional ice-shelf/ocean modeling results and comparison with ice-core records indicate that oceanic and atmospheric warming caused ice-shelf collapse. |
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