Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time
The age of the Milne Land Stade (MLS) moraines in the Scoresby Sund region of East Greenland is key for testing the hypothesis that strong seasonality marked abrupt cooling events, such as the Younger Dryas, registered in Greenland ice cores. The relevant chronology is based on 69 radiocarbon dates...
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Online Access: | http://hdl.handle.net/11568/122607 https://doi.org/10.1016/j.quascirev.2008.08.001 |
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ftunivpisairis:oai:arpi.unipi.it:11568/122607 2024-02-11T10:03:26+01:00 Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time HALL B. L DENTON G. H KELLY M LOWELL T. BARONI, CARLO HALL B., L Baroni, Carlo DENTON G., H Kelly, M Lowell, T. 2008 STAMPA http://hdl.handle.net/11568/122607 https://doi.org/10.1016/j.quascirev.2008.08.001 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000262130000003 volume:27 issue:(25-26) firstpage:2283 lastpage:2291 numberofpages:9 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/122607 doi:10.1016/j.quascirev.2008.08.001 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-56549093951 Glacial geology Last Glacial Maximum Late Glacial Younger Drya radiocarbon date seasonality East Greenland Kjove Land Scoresby Sund sea level change info:eu-repo/semantics/article 2008 ftunivpisairis https://doi.org/10.1016/j.quascirev.2008.08.001 2024-01-24T17:40:54Z The age of the Milne Land Stade (MLS) moraines in the Scoresby Sund region of East Greenland is key for testing the hypothesis that strong seasonality marked abrupt cooling events, such as the Younger Dryas, registered in Greenland ice cores. The relevant chronology is based on 69 radiocarbon dates of shells from raised beaches and deltas related to marine inundation and isostatic rebound that accompanied glacier retreat from the moraines. Taken together, these dates form the basis for a relative sea-level curve that shows very high rates of emergence typical of recently deglaciated regions. Upward extrapolation of this curve suggests that the marine limit (134 m a.s.l.) dates to about 12,400 cal yr B.P. The shorelines that mark the marine limit lie within areas that were ice-covered when the glaciers were at the outer limit of the MLS advance; hence, the moraines that form the outer limit must antedate 12,400 cal yr B.P. and probably are from earliest Younger Dryas or Allerød time. At Holger Danskes Briller, an inner moraine grades to a massive ice-contact delta, now at 101 m a.s.l., which is dated to 11,000–11,300 cal yr B.P. The age of the outer MLS moraines, along with constraints on the maximum possible Younger Dryas ice extent and snowline lowering are consistent with the idea that East Greenland climate experienced strong seasonality during Younger Dryas time. Article in Journal/Newspaper East Greenland glacier Greenland Greenland ice cores Milne Land Scoresby Sund ARPI - Archivio della Ricerca dell'Università di Pisa Greenland Sund ENVELOPE(13.644,13.644,66.207,66.207) Scoresby ENVELOPE(162.750,162.750,-66.567,-66.567) Scoresby Sund ENVELOPE(-24.387,-24.387,70.476,70.476) Milne Land ENVELOPE(-26.750,-26.750,70.683,70.683) Quaternary Science Reviews 27 25-26 2283 2291 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Glacial geology Last Glacial Maximum Late Glacial Younger Drya radiocarbon date seasonality East Greenland Kjove Land Scoresby Sund sea level change |
spellingShingle |
Glacial geology Last Glacial Maximum Late Glacial Younger Drya radiocarbon date seasonality East Greenland Kjove Land Scoresby Sund sea level change HALL B. L DENTON G. H KELLY M LOWELL T. BARONI, CARLO Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time |
topic_facet |
Glacial geology Last Glacial Maximum Late Glacial Younger Drya radiocarbon date seasonality East Greenland Kjove Land Scoresby Sund sea level change |
description |
The age of the Milne Land Stade (MLS) moraines in the Scoresby Sund region of East Greenland is key for testing the hypothesis that strong seasonality marked abrupt cooling events, such as the Younger Dryas, registered in Greenland ice cores. The relevant chronology is based on 69 radiocarbon dates of shells from raised beaches and deltas related to marine inundation and isostatic rebound that accompanied glacier retreat from the moraines. Taken together, these dates form the basis for a relative sea-level curve that shows very high rates of emergence typical of recently deglaciated regions. Upward extrapolation of this curve suggests that the marine limit (134 m a.s.l.) dates to about 12,400 cal yr B.P. The shorelines that mark the marine limit lie within areas that were ice-covered when the glaciers were at the outer limit of the MLS advance; hence, the moraines that form the outer limit must antedate 12,400 cal yr B.P. and probably are from earliest Younger Dryas or Allerød time. At Holger Danskes Briller, an inner moraine grades to a massive ice-contact delta, now at 101 m a.s.l., which is dated to 11,000–11,300 cal yr B.P. The age of the outer MLS moraines, along with constraints on the maximum possible Younger Dryas ice extent and snowline lowering are consistent with the idea that East Greenland climate experienced strong seasonality during Younger Dryas time. |
author2 |
HALL B., L Baroni, Carlo DENTON G., H Kelly, M Lowell, T. |
format |
Article in Journal/Newspaper |
author |
HALL B. L DENTON G. H KELLY M LOWELL T. BARONI, CARLO |
author_facet |
HALL B. L DENTON G. H KELLY M LOWELL T. BARONI, CARLO |
author_sort |
HALL B. L |
title |
Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time |
title_short |
Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time |
title_full |
Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time |
title_fullStr |
Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time |
title_full_unstemmed |
Relative sea-level change, Kjove Land, Scoresby Sund, East Greenland: Implications for seasonality in Younger Dryas time |
title_sort |
relative sea-level change, kjove land, scoresby sund, east greenland: implications for seasonality in younger dryas time |
publishDate |
2008 |
url |
http://hdl.handle.net/11568/122607 https://doi.org/10.1016/j.quascirev.2008.08.001 |
long_lat |
ENVELOPE(13.644,13.644,66.207,66.207) ENVELOPE(162.750,162.750,-66.567,-66.567) ENVELOPE(-24.387,-24.387,70.476,70.476) ENVELOPE(-26.750,-26.750,70.683,70.683) |
geographic |
Greenland Sund Scoresby Scoresby Sund Milne Land |
geographic_facet |
Greenland Sund Scoresby Scoresby Sund Milne Land |
genre |
East Greenland glacier Greenland Greenland ice cores Milne Land Scoresby Sund |
genre_facet |
East Greenland glacier Greenland Greenland ice cores Milne Land Scoresby Sund |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000262130000003 volume:27 issue:(25-26) firstpage:2283 lastpage:2291 numberofpages:9 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/122607 doi:10.1016/j.quascirev.2008.08.001 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-56549093951 |
op_doi |
https://doi.org/10.1016/j.quascirev.2008.08.001 |
container_title |
Quaternary Science Reviews |
container_volume |
27 |
container_issue |
25-26 |
container_start_page |
2283 |
op_container_end_page |
2291 |
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1790599663551774720 |