Tabular iceberg collisions within the coastal regime
ABSTRACT. During 2000–07, five giant icebergs (B15A, B15J, B15K, C16 and C25) adrift in the southwestern Ross Sea, Antarctica, were instrumented with global positioning system (GPS) receivers and other instruments to monitor their behavior in the near-coastal environment. The measurements show that...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.430.1908 2023-05-15T13:43:47+02:00 Tabular iceberg collisions within the coastal regime Douglas R. Macayeal Marianne H. Okal Jonathan E. Thom Kelly M. Brunt Young-jin Kim Andrew K. Bliss The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.430.1908 http://www.igsoc.org/journal/54/185/j07j053.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.430.1908 http://www.igsoc.org/journal/54/185/j07j053.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/journal/54/185/j07j053.pdf text 2008 ftciteseerx 2016-01-08T04:37:08Z ABSTRACT. During 2000–07, five giant icebergs (B15A, B15J, B15K, C16 and C25) adrift in the southwestern Ross Sea, Antarctica, were instrumented with global positioning system (GPS) receivers and other instruments to monitor their behavior in the near-coastal environment. The measurements show that collision processes can strongly influence iceberg behavior and delay their progress in drifting to the open ocean. Collisions appear to have been a dominant control on the movement of B15A, the largest of the icebergs, during the 4-year period it gyrated within the limited confines of Ross Island, the fixed Ross Ice Shelf and grounded C16. Iceberg interactions in the near-coastal regime are largely driven by ocean tidal effects which determine the magnitude of forces generated during collision and break-up events. Estimates of forces derived from the observed drift trajectories during the iceberg-collisioninduced calving of iceberg C19 from the Ross Ice Shelf, during the iceberg-induced break-off of the tip of the Drygalski Ice Tongue and the break-up of B15A provide a crude estimate of the stress scale involved in iceberg calving. Considering the total area the vertical face of new rifts created in the calving or break-up process, and not accounting for local stress amplification near rift tips, this estimated stress scale is 10 4 Pa. Text Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Island Ross Sea Unknown Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) Ross Ice Shelf Ross Island Ross Sea |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT. During 2000–07, five giant icebergs (B15A, B15J, B15K, C16 and C25) adrift in the southwestern Ross Sea, Antarctica, were instrumented with global positioning system (GPS) receivers and other instruments to monitor their behavior in the near-coastal environment. The measurements show that collision processes can strongly influence iceberg behavior and delay their progress in drifting to the open ocean. Collisions appear to have been a dominant control on the movement of B15A, the largest of the icebergs, during the 4-year period it gyrated within the limited confines of Ross Island, the fixed Ross Ice Shelf and grounded C16. Iceberg interactions in the near-coastal regime are largely driven by ocean tidal effects which determine the magnitude of forces generated during collision and break-up events. Estimates of forces derived from the observed drift trajectories during the iceberg-collisioninduced calving of iceberg C19 from the Ross Ice Shelf, during the iceberg-induced break-off of the tip of the Drygalski Ice Tongue and the break-up of B15A provide a crude estimate of the stress scale involved in iceberg calving. Considering the total area the vertical face of new rifts created in the calving or break-up process, and not accounting for local stress amplification near rift tips, this estimated stress scale is 10 4 Pa. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Douglas R. Macayeal Marianne H. Okal Jonathan E. Thom Kelly M. Brunt Young-jin Kim Andrew K. Bliss |
spellingShingle |
Douglas R. Macayeal Marianne H. Okal Jonathan E. Thom Kelly M. Brunt Young-jin Kim Andrew K. Bliss Tabular iceberg collisions within the coastal regime |
author_facet |
Douglas R. Macayeal Marianne H. Okal Jonathan E. Thom Kelly M. Brunt Young-jin Kim Andrew K. Bliss |
author_sort |
Douglas R. Macayeal |
title |
Tabular iceberg collisions within the coastal regime |
title_short |
Tabular iceberg collisions within the coastal regime |
title_full |
Tabular iceberg collisions within the coastal regime |
title_fullStr |
Tabular iceberg collisions within the coastal regime |
title_full_unstemmed |
Tabular iceberg collisions within the coastal regime |
title_sort |
tabular iceberg collisions within the coastal regime |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.430.1908 http://www.igsoc.org/journal/54/185/j07j053.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) |
geographic |
Drygalski Drygalski Ice Tongue Ross Ice Shelf Ross Island Ross Sea |
geographic_facet |
Drygalski Drygalski Ice Tongue Ross Ice Shelf Ross Island Ross Sea |
genre |
Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Island Ross Sea |
genre_facet |
Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Island Ross Sea |
op_source |
http://www.igsoc.org/journal/54/185/j07j053.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.430.1908 http://www.igsoc.org/journal/54/185/j07j053.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766193219854401536 |