Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene
[1] Geochemical profiles from the North Atlantic Ocean suggest that the vertical d13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from ne...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.572.5943 2023-05-15T16:27:41+02:00 Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.572.5943 http://www.moraymo.us/2004_Raymoetal.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.572.5943 http://www.moraymo.us/2004_Raymoetal.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.moraymo.us/2004_Raymoetal.pdf paleoceanography North Atlantic Deep Water Pleistocene text ftciteseerx 2016-01-08T12:36:05Z [1] Geochemical profiles from the North Atlantic Ocean suggest that the vertical d13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from nearby landmasses. The most anomalous d13C profiles are from the extreme interglaciations of the late Pleistocene. This compilation of data suggests that, unlike today (an extreme interglaciation), the two primary sources of northern deep water, Norwegian-Greenland Sea and Labrador Sea/subpolar North Atlantic, had different characteristic d13C values over most of the Pleistocene. We speculate that the current open sea ice conditions in the Norwegian-Greenland Sea are a relatively rare occurrence and that the high-d13C deep water that forms in this region today is geologically unusual. If northern source deep waters can have highly variable d13C, then this likelihood must be considered when inferring past circulation changes from benthic d13C records. INDEX TERMS: 1050 Geochemistry: Text Greenland Greenland Sea Labrador Sea North Atlantic Deep Water North Atlantic Sea ice Unknown Greenland |
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ftciteseerx |
language |
English |
topic |
paleoceanography North Atlantic Deep Water Pleistocene |
spellingShingle |
paleoceanography North Atlantic Deep Water Pleistocene Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
topic_facet |
paleoceanography North Atlantic Deep Water Pleistocene |
description |
[1] Geochemical profiles from the North Atlantic Ocean suggest that the vertical d13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from nearby landmasses. The most anomalous d13C profiles are from the extreme interglaciations of the late Pleistocene. This compilation of data suggests that, unlike today (an extreme interglaciation), the two primary sources of northern deep water, Norwegian-Greenland Sea and Labrador Sea/subpolar North Atlantic, had different characteristic d13C values over most of the Pleistocene. We speculate that the current open sea ice conditions in the Norwegian-Greenland Sea are a relatively rare occurrence and that the high-d13C deep water that forms in this region today is geologically unusual. If northern source deep waters can have highly variable d13C, then this likelihood must be considered when inferring past circulation changes from benthic d13C records. INDEX TERMS: 1050 Geochemistry: |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_short |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_full |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_fullStr |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_full_unstemmed |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_sort |
stability of north atlantic water masses in face of pronounced climate variability during the pleistocene |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.572.5943 http://www.moraymo.us/2004_Raymoetal.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Sea Labrador Sea North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
Greenland Greenland Sea Labrador Sea North Atlantic Deep Water North Atlantic Sea ice |
op_source |
http://www.moraymo.us/2004_Raymoetal.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.572.5943 http://www.moraymo.us/2004_Raymoetal.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766017137067950080 |