(Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303
Cores raised during IODP Expedition 303 off southern Greenland (Eirik Ridge site 1305) and off the Labrador Coast (Orphan Knoll site 1302/1303) were analyzed to establish an isotope stratigraphy, respectively for the "inner" and "outer" basins of the Labrador Sea (LS). These isot...
Main Authors: | , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2011
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.767358 https://doi.org/10.1594/PANGAEA.767358 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.767358 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
303-U1302 303-U1305 Age model LR04 Lisiecki & Raymo (2005) paleomagnetic COMPCORE Composite Core Datum level DEPTH sediment/rock Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Isotopic event Joides Resolution North Atlantic Climate 1 Northwest Atlantic |
spellingShingle |
303-U1302 303-U1305 Age model LR04 Lisiecki & Raymo (2005) paleomagnetic COMPCORE Composite Core Datum level DEPTH sediment/rock Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Isotopic event Joides Resolution North Atlantic Climate 1 Northwest Atlantic Hillaire-Marcel, Claude de Vernal, Anne McKay, Jennifer L (Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 |
topic_facet |
303-U1302 303-U1305 Age model LR04 Lisiecki & Raymo (2005) paleomagnetic COMPCORE Composite Core Datum level DEPTH sediment/rock Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Isotopic event Joides Resolution North Atlantic Climate 1 Northwest Atlantic |
description |
Cores raised during IODP Expedition 303 off southern Greenland (Eirik Ridge site 1305) and off the Labrador Coast (Orphan Knoll site 1302/1303) were analyzed to establish an isotope stratigraphy, respectively for the "inner" and "outer" basins of the Labrador Sea (LS). These isotopic data also provide information on the Atlantic Meridional Overturning Circulation (AMOC), notably with regard to the intensity of the Western Boundary Under Current (WBUC), which is tightly controlled by the production of Denmark Strait Overflow Water (DSOW), and the production of Labrador Sea Water (LSW) in the inner basin through winter cooling and convection. The upper 184 m of sediment at Eirik Ridge spans marine isotope stages (MIS) 32 to 1. At this site, two distinct regimes are observed: prior to MIS 20, the isotopic record resembles that of the open North Atlantic records of the interval, whereas a more site-specific pattern is observed afterwards. This later pattern was characterized by i) high DSOW production rates and strong WBUC during interglacial stages, as indicated by sedimentation rates, ii) large amplitude d18O-shifts from glacial stages to interglacial stages (> 2.5 per mil) and iii) an overall range of d18O-values significantly more positive than before. At Orphan Knoll, the 105 m record spans approximately 800 ka and provides direct information on linkages between the northeastern sector of the Laurentide Ice Sheet and the North Atlantic. At this site, a shift towards larger amplitude glacial/interglacial ranges of d18O-values occurred after MIS 13, although isotopic records bear a typical North Atlantic signature, particularly during MIS 5, in contradiction to those of Eirik Ridge, where substages 5a to 5c are barely recognized. Closer examination of d18O-records in planktic and benthic foraminifera demonstrates the presence of distinct deep-water masses in the inner vs. outer LS basins during MIS 11 and more particularly MIS 5e. Data confirm that the modern AMOC, with LSW formation, seems mostly exclusive to ... |
format |
Dataset |
author |
Hillaire-Marcel, Claude de Vernal, Anne McKay, Jennifer L |
author_facet |
Hillaire-Marcel, Claude de Vernal, Anne McKay, Jennifer L |
author_sort |
Hillaire-Marcel, Claude |
title |
(Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 |
title_short |
(Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 |
title_full |
(Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 |
title_fullStr |
(Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 |
title_full_unstemmed |
(Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 |
title_sort |
(table 1) depth and ages of the chronolostratigraphical boundaries from iodp sites 303-u1305, u1302 and u1303 |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.767358 https://doi.org/10.1594/PANGAEA.767358 |
op_coverage |
MEDIAN LATITUDE: 53.787875 * MEDIAN LONGITUDE: -47.083955 * SOUTH-BOUND LATITUDE: 50.100600 * WEST-BOUND LONGITUDE: -48.529710 * NORTH-BOUND LATITUDE: 57.475150 * EAST-BOUND LONGITUDE: -45.638200 * MINIMUM DEPTH, sediment/rock: 2.71 m * MAXIMUM DEPTH, sediment/rock: 170.80 m |
long_lat |
ENVELOPE(-46.500,-46.500,50.500,50.500) ENVELOPE(-44.500,-44.500,58.500,58.500) ENVELOPE(169.350,169.350,-77.517,-77.517) ENVELOPE(-48.529710,-45.638200,57.475150,50.100600) |
geographic |
Greenland Orphan Knoll Eirik Ridge Knoll The |
geographic_facet |
Greenland Orphan Knoll Eirik Ridge Knoll The |
genre |
Denmark Strait Greenland Ice Sheet Labrador Sea North Atlantic Northwest Atlantic |
genre_facet |
Denmark Strait Greenland Ice Sheet Labrador Sea North Atlantic Northwest Atlantic |
op_source |
Supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; McKay, Jennifer L (2011): Foraminifer isotope study of the Pleistocene Labrador Sea, northwest North Atlantic (IODP Sites 1302/03 and 1305), with emphasis on paleoceanographical differences between its “inner” and “outer” basins. Marine Geology, 279(1-4, 188-198, https://doi.org/10.1016/j.margeo.2010.11.001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.767358 https://doi.org/10.1594/PANGAEA.767358 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.767358 https://doi.org/10.1016/j.margeo.2010.11.001 |
_version_ |
1766396715764547584 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.767358 2023-05-15T16:00:42+02:00 (Table 1) Depth and ages of the chronolostratigraphical boundaries from IODP Sites 303-U1305, U1302 and U1303 Hillaire-Marcel, Claude de Vernal, Anne McKay, Jennifer L MEDIAN LATITUDE: 53.787875 * MEDIAN LONGITUDE: -47.083955 * SOUTH-BOUND LATITUDE: 50.100600 * WEST-BOUND LONGITUDE: -48.529710 * NORTH-BOUND LATITUDE: 57.475150 * EAST-BOUND LONGITUDE: -45.638200 * MINIMUM DEPTH, sediment/rock: 2.71 m * MAXIMUM DEPTH, sediment/rock: 170.80 m 2011-08-24 text/tab-separated-values, 102 data points https://doi.pangaea.de/10.1594/PANGAEA.767358 https://doi.org/10.1594/PANGAEA.767358 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.767358 https://doi.org/10.1594/PANGAEA.767358 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; McKay, Jennifer L (2011): Foraminifer isotope study of the Pleistocene Labrador Sea, northwest North Atlantic (IODP Sites 1302/03 and 1305), with emphasis on paleoceanographical differences between its “inner” and “outer” basins. Marine Geology, 279(1-4, 188-198, https://doi.org/10.1016/j.margeo.2010.11.001 303-U1302 303-U1305 Age model LR04 Lisiecki & Raymo (2005) paleomagnetic COMPCORE Composite Core Datum level DEPTH sediment/rock Event label Exp303 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Isotopic event Joides Resolution North Atlantic Climate 1 Northwest Atlantic Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.767358 https://doi.org/10.1016/j.margeo.2010.11.001 2023-01-20T08:52:37Z Cores raised during IODP Expedition 303 off southern Greenland (Eirik Ridge site 1305) and off the Labrador Coast (Orphan Knoll site 1302/1303) were analyzed to establish an isotope stratigraphy, respectively for the "inner" and "outer" basins of the Labrador Sea (LS). These isotopic data also provide information on the Atlantic Meridional Overturning Circulation (AMOC), notably with regard to the intensity of the Western Boundary Under Current (WBUC), which is tightly controlled by the production of Denmark Strait Overflow Water (DSOW), and the production of Labrador Sea Water (LSW) in the inner basin through winter cooling and convection. The upper 184 m of sediment at Eirik Ridge spans marine isotope stages (MIS) 32 to 1. At this site, two distinct regimes are observed: prior to MIS 20, the isotopic record resembles that of the open North Atlantic records of the interval, whereas a more site-specific pattern is observed afterwards. This later pattern was characterized by i) high DSOW production rates and strong WBUC during interglacial stages, as indicated by sedimentation rates, ii) large amplitude d18O-shifts from glacial stages to interglacial stages (> 2.5 per mil) and iii) an overall range of d18O-values significantly more positive than before. At Orphan Knoll, the 105 m record spans approximately 800 ka and provides direct information on linkages between the northeastern sector of the Laurentide Ice Sheet and the North Atlantic. At this site, a shift towards larger amplitude glacial/interglacial ranges of d18O-values occurred after MIS 13, although isotopic records bear a typical North Atlantic signature, particularly during MIS 5, in contradiction to those of Eirik Ridge, where substages 5a to 5c are barely recognized. Closer examination of d18O-records in planktic and benthic foraminifera demonstrates the presence of distinct deep-water masses in the inner vs. outer LS basins during MIS 11 and more particularly MIS 5e. Data confirm that the modern AMOC, with LSW formation, seems mostly exclusive to ... Dataset Denmark Strait Greenland Ice Sheet Labrador Sea North Atlantic Northwest Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Greenland Orphan Knoll ENVELOPE(-46.500,-46.500,50.500,50.500) Eirik Ridge ENVELOPE(-44.500,-44.500,58.500,58.500) Knoll The ENVELOPE(169.350,169.350,-77.517,-77.517) ENVELOPE(-48.529710,-45.638200,57.475150,50.100600) |