Catastrophic ice shelf breakup as the source of Heinrich event icebergs
Heinrich layers of the glacial North Atlantic record abrupt widespread iceberg rafting of detrital carbonate and other lithic material at the extreme-cold culminations of Bond climate cycles. Both internal (glaciologic) and external (climate) forcings have been proposed. Here we suggest an explanati...
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ftportlandstate:oai:pdxscholar.library.pdx.edu:geology_fac-1033 2023-05-15T13:58:46+02:00 Catastrophic ice shelf breakup as the source of Heinrich event icebergs Hulbe, Christina L. MacAyeal, D. R. Denton, George H. Kleman, Johan Lowell, Thomas 2004-01-01T08:00:00Z application/pdf https://pdxscholar.library.pdx.edu/geology_fac/34 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1033&context=geology_fac unknown PDXScholar https://pdxscholar.library.pdx.edu/geology_fac/34 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1033&context=geology_fac Geology Faculty Publications and Presentations Ice shelves -- Antarctica Ice shelves -- Effect of climatic change Glaciers -- Antarctica -- Antarctic Peninsula Geology text 2004 ftportlandstate 2022-01-09T19:24:25Z Heinrich layers of the glacial North Atlantic record abrupt widespread iceberg rafting of detrital carbonate and other lithic material at the extreme-cold culminations of Bond climate cycles. Both internal (glaciologic) and external (climate) forcings have been proposed. Here we suggest an explanation for the iceberg release that encompasses external climate forcing on the basis of a new glaciological process recently witnessed along the Antarctic Peninsula: rapid disintegrations of fringing ice shelves induced by climate-controlled meltwater infilling of surface crevasses. We postulate that peripheral ice shelves, formed along the eastern Canadian seaboard during extreme cold conditions, would be vulnerable to sudden climate-driven disintegration during any climate amelioration. Ice shelf disintegration then would be the source of Heinrich event icebergs. Text Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ice Shelves Iceberg* North Atlantic Portland State University: PDXScholar Antarctic Antarctic Peninsula The Antarctic |
institution |
Open Polar |
collection |
Portland State University: PDXScholar |
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ftportlandstate |
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unknown |
topic |
Ice shelves -- Antarctica Ice shelves -- Effect of climatic change Glaciers -- Antarctica -- Antarctic Peninsula Geology |
spellingShingle |
Ice shelves -- Antarctica Ice shelves -- Effect of climatic change Glaciers -- Antarctica -- Antarctic Peninsula Geology Hulbe, Christina L. MacAyeal, D. R. Denton, George H. Kleman, Johan Lowell, Thomas Catastrophic ice shelf breakup as the source of Heinrich event icebergs |
topic_facet |
Ice shelves -- Antarctica Ice shelves -- Effect of climatic change Glaciers -- Antarctica -- Antarctic Peninsula Geology |
description |
Heinrich layers of the glacial North Atlantic record abrupt widespread iceberg rafting of detrital carbonate and other lithic material at the extreme-cold culminations of Bond climate cycles. Both internal (glaciologic) and external (climate) forcings have been proposed. Here we suggest an explanation for the iceberg release that encompasses external climate forcing on the basis of a new glaciological process recently witnessed along the Antarctic Peninsula: rapid disintegrations of fringing ice shelves induced by climate-controlled meltwater infilling of surface crevasses. We postulate that peripheral ice shelves, formed along the eastern Canadian seaboard during extreme cold conditions, would be vulnerable to sudden climate-driven disintegration during any climate amelioration. Ice shelf disintegration then would be the source of Heinrich event icebergs. |
format |
Text |
author |
Hulbe, Christina L. MacAyeal, D. R. Denton, George H. Kleman, Johan Lowell, Thomas |
author_facet |
Hulbe, Christina L. MacAyeal, D. R. Denton, George H. Kleman, Johan Lowell, Thomas |
author_sort |
Hulbe, Christina L. |
title |
Catastrophic ice shelf breakup as the source of Heinrich event icebergs |
title_short |
Catastrophic ice shelf breakup as the source of Heinrich event icebergs |
title_full |
Catastrophic ice shelf breakup as the source of Heinrich event icebergs |
title_fullStr |
Catastrophic ice shelf breakup as the source of Heinrich event icebergs |
title_full_unstemmed |
Catastrophic ice shelf breakup as the source of Heinrich event icebergs |
title_sort |
catastrophic ice shelf breakup as the source of heinrich event icebergs |
publisher |
PDXScholar |
publishDate |
2004 |
url |
https://pdxscholar.library.pdx.edu/geology_fac/34 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1033&context=geology_fac |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ice Shelves Iceberg* North Atlantic |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ice Shelves Iceberg* North Atlantic |
op_source |
Geology Faculty Publications and Presentations |
op_relation |
https://pdxscholar.library.pdx.edu/geology_fac/34 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1033&context=geology_fac |
_version_ |
1766267103324667904 |