The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography
Abstract The precipitation fields of a palaeoatmospheric general circulation model are used to derive estimates of the geographical distribution, and flux, of icebergs from the Laurentide, Fennoscandinavian and eastern Siberian ice‐sheets at the Last Glacial Maximum (LGM). The atmospheric model fiel...
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crwiley:10.1002/jqs.628 2024-06-02T07:59:59+00:00 The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography Bigg, Grant R. Wadley, Martin R. 2001 http://dx.doi.org/10.1002/jqs.628 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.628 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.628 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 16, issue 6, page 565-573 ISSN 0267-8179 1099-1417 journal-article 2001 crwiley https://doi.org/10.1002/jqs.628 2024-05-03T10:58:05Z Abstract The precipitation fields of a palaeoatmospheric general circulation model are used to derive estimates of the geographical distribution, and flux, of icebergs from the Laurentide, Fennoscandinavian and eastern Siberian ice‐sheets at the Last Glacial Maximum (LGM). The atmospheric model fields from LGM simulations using CLIMAP or Peltier (ICE‐4G) ice orography were studied, to test the sensitivity of the predicted flux. The estimated Northern Hemispheric LGM iceberg flux is 3500–4000 km 3 yr −1 , of which about 60% issued directly into the North Atlantic. The iceberg flux from the St Lawrence area is of similar significance to that issuing from Hudson Strait in all estimates. Both the North Pacific and the Arctic received substantial iceberg fluxes (ca. 700 km 3 yr −1 ), with relatively minor differences occurring between the two ice‐sheet reconstructions. Apparent discrepancies between Arctic deep‐sea core samples of ice‐rafted debris and our estimates of mean glacial iceberg flux may be ascribed to coastal trapping of bergs, the existence of floating ice tongues or a rapid exit of icebergs from the Arctic basin into the Greenland Sea through the Fram Strait. Copyright © 2001 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Basin Arctic Fram Strait Greenland Greenland Sea Hudson Strait Ice Sheet Iceberg* North Atlantic Wiley Online Library Arctic Greenland Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Pacific Peltier ENVELOPE(-63.495,-63.495,-64.854,-64.854) Journal of Quaternary Science 16 6 565 573 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The precipitation fields of a palaeoatmospheric general circulation model are used to derive estimates of the geographical distribution, and flux, of icebergs from the Laurentide, Fennoscandinavian and eastern Siberian ice‐sheets at the Last Glacial Maximum (LGM). The atmospheric model fields from LGM simulations using CLIMAP or Peltier (ICE‐4G) ice orography were studied, to test the sensitivity of the predicted flux. The estimated Northern Hemispheric LGM iceberg flux is 3500–4000 km 3 yr −1 , of which about 60% issued directly into the North Atlantic. The iceberg flux from the St Lawrence area is of similar significance to that issuing from Hudson Strait in all estimates. Both the North Pacific and the Arctic received substantial iceberg fluxes (ca. 700 km 3 yr −1 ), with relatively minor differences occurring between the two ice‐sheet reconstructions. Apparent discrepancies between Arctic deep‐sea core samples of ice‐rafted debris and our estimates of mean glacial iceberg flux may be ascribed to coastal trapping of bergs, the existence of floating ice tongues or a rapid exit of icebergs from the Arctic basin into the Greenland Sea through the Fram Strait. Copyright © 2001 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Bigg, Grant R. Wadley, Martin R. |
spellingShingle |
Bigg, Grant R. Wadley, Martin R. The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography |
author_facet |
Bigg, Grant R. Wadley, Martin R. |
author_sort |
Bigg, Grant R. |
title |
The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography |
title_short |
The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography |
title_full |
The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography |
title_fullStr |
The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography |
title_full_unstemmed |
The origin and flux of icebergs released into the Last Glacial Maximum Northern Hemisphere oceans: the impact of ice‐sheet topography |
title_sort |
origin and flux of icebergs released into the last glacial maximum northern hemisphere oceans: the impact of ice‐sheet topography |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1002/jqs.628 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.628 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.628 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-63.495,-63.495,-64.854,-64.854) |
geographic |
Arctic Greenland Hudson Hudson Strait Pacific Peltier |
geographic_facet |
Arctic Greenland Hudson Hudson Strait Pacific Peltier |
genre |
Arctic Basin Arctic Fram Strait Greenland Greenland Sea Hudson Strait Ice Sheet Iceberg* North Atlantic |
genre_facet |
Arctic Basin Arctic Fram Strait Greenland Greenland Sea Hudson Strait Ice Sheet Iceberg* North Atlantic |
op_source |
Journal of Quaternary Science volume 16, issue 6, page 565-573 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.628 |
container_title |
Journal of Quaternary Science |
container_volume |
16 |
container_issue |
6 |
container_start_page |
565 |
op_container_end_page |
573 |
_version_ |
1800744014797864960 |