Rapid sea-level rise and Holocene climate in the Chukchi Sea
Three new sediment cores from the Chukchi Sea preserve a record of local paleoenvironment, sedimentation, and flooding of the Chukchi Shelf (50 m) by glacial-eustatic sea-level rise. Radiocarbon dates on foraminifera provide the first marine evidence that the sea invaded Hope Valley (southern Chukch...
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ftunivmassamh:oai:works.bepress.com:julie_brigham_grette-1021 2023-05-15T15:05:24+02:00 Rapid sea-level rise and Holocene climate in the Chukchi Sea Keigwin, Lloyd D Donnelly, Jeffre P Cook, Mea S Driscoll, Neal W Brigham_Grette, Julie 2006-10-01T07:00:00Z https://works.bepress.com/julie_brigham_grette/11 unknown SelectedWorks https://works.bepress.com/julie_brigham_grette/11 Julie Brigham-Grette sea level Chukchi Sea Holocene Bering Strait foraminifera Earth Sciences text 2006 ftunivmassamh 2022-01-10T06:54:05Z Three new sediment cores from the Chukchi Sea preserve a record of local paleoenvironment, sedimentation, and flooding of the Chukchi Shelf (50 m) by glacial-eustatic sea-level rise. Radiocarbon dates on foraminifera provide the first marine evidence that the sea invaded Hope Valley (southern Chukchi Sea, 53 m) as early as 12 ka. The lack of significant sediment accumulation since ca. 7 ka in Hope Valley, southeastern Chukchi Shelf, is consistent with decreased sediment supply and fluvial discharge to the shelf as deglaciation of Alaska concluded. Abundant benthic foraminifera from a site west of Barrow Canyon indicate that surface waters were more productive 4–6 ka, and this productivity varied on centennial time scales. An offshore companion to this core contains a 20 m record of the Holocene. These results show that carefully selected core sites from the western Arctic Ocean can have a temporal resolution equal to the best cores from other regions, and that these sites can be exploited for high-resolution studies of the paleoenvironment. Text Arctic Arctic Ocean Barrow Bering Strait Chukchi Chukchi Sea Foraminifera* Alaska University of Massachusetts: ScholarWorks@UMass Amherst Arctic Arctic Ocean Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Bering Strait Chukchi Sea Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Hope Valley ENVELOPE(-171.000,-171.000,68.833,68.833) |
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Open Polar |
collection |
University of Massachusetts: ScholarWorks@UMass Amherst |
op_collection_id |
ftunivmassamh |
language |
unknown |
topic |
sea level Chukchi Sea Holocene Bering Strait foraminifera Earth Sciences |
spellingShingle |
sea level Chukchi Sea Holocene Bering Strait foraminifera Earth Sciences Keigwin, Lloyd D Donnelly, Jeffre P Cook, Mea S Driscoll, Neal W Brigham_Grette, Julie Rapid sea-level rise and Holocene climate in the Chukchi Sea |
topic_facet |
sea level Chukchi Sea Holocene Bering Strait foraminifera Earth Sciences |
description |
Three new sediment cores from the Chukchi Sea preserve a record of local paleoenvironment, sedimentation, and flooding of the Chukchi Shelf (50 m) by glacial-eustatic sea-level rise. Radiocarbon dates on foraminifera provide the first marine evidence that the sea invaded Hope Valley (southern Chukchi Sea, 53 m) as early as 12 ka. The lack of significant sediment accumulation since ca. 7 ka in Hope Valley, southeastern Chukchi Shelf, is consistent with decreased sediment supply and fluvial discharge to the shelf as deglaciation of Alaska concluded. Abundant benthic foraminifera from a site west of Barrow Canyon indicate that surface waters were more productive 4–6 ka, and this productivity varied on centennial time scales. An offshore companion to this core contains a 20 m record of the Holocene. These results show that carefully selected core sites from the western Arctic Ocean can have a temporal resolution equal to the best cores from other regions, and that these sites can be exploited for high-resolution studies of the paleoenvironment. |
format |
Text |
author |
Keigwin, Lloyd D Donnelly, Jeffre P Cook, Mea S Driscoll, Neal W Brigham_Grette, Julie |
author_facet |
Keigwin, Lloyd D Donnelly, Jeffre P Cook, Mea S Driscoll, Neal W Brigham_Grette, Julie |
author_sort |
Keigwin, Lloyd D |
title |
Rapid sea-level rise and Holocene climate in the Chukchi Sea |
title_short |
Rapid sea-level rise and Holocene climate in the Chukchi Sea |
title_full |
Rapid sea-level rise and Holocene climate in the Chukchi Sea |
title_fullStr |
Rapid sea-level rise and Holocene climate in the Chukchi Sea |
title_full_unstemmed |
Rapid sea-level rise and Holocene climate in the Chukchi Sea |
title_sort |
rapid sea-level rise and holocene climate in the chukchi sea |
publisher |
SelectedWorks |
publishDate |
2006 |
url |
https://works.bepress.com/julie_brigham_grette/11 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) ENVELOPE(-169.167,-169.167,70.550,70.550) ENVELOPE(-171.000,-171.000,68.833,68.833) |
geographic |
Arctic Arctic Ocean Barrow Canyon Bering Strait Chukchi Sea Chukchi Shelf Hope Valley |
geographic_facet |
Arctic Arctic Ocean Barrow Canyon Bering Strait Chukchi Sea Chukchi Shelf Hope Valley |
genre |
Arctic Arctic Ocean Barrow Bering Strait Chukchi Chukchi Sea Foraminifera* Alaska |
genre_facet |
Arctic Arctic Ocean Barrow Bering Strait Chukchi Chukchi Sea Foraminifera* Alaska |
op_source |
Julie Brigham-Grette |
op_relation |
https://works.bepress.com/julie_brigham_grette/11 |
_version_ |
1766337113039568896 |