Hoogakker, Babette A A; Chapman, Mark R; McCave, I Nick; Hillaire-Marcel, Claude; Ellison, Christopher RW; Hall, Ian R; Telford, Richard J (2011): (Table S1) Age determination of sediment cores from the Labrador Sea [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.829499, Supplement to: Hoogakker, BAA et al. (2011): Dynamics of North Atlantic Deep Water masses during the Holocene. Paleoceanography, 26(4), PA4214, https://doi.org/10.1029/2011PA002155
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Abstract:
High resolution flow speed reconstructions of two core sites located on Gardar Drift in the northeast Atlantic Basin and Orphan Knoll in the northwest Atlantic Basin reveal a long-term decrease in flow speed of Northeast Atlantic Deep Water (NEADW) after 6,500 years. Benthic foraminiferal oxygen isotopes of sites currently bathed in NEADW show a 0.2per mil depletion after 6,500 years, shortly after the start of the development of a carbon isotope gradient between NEADW and Norwegian Sea Deep Water. We consider these changes in near-bottom flow vigor and benthic foraminiferal isotope records to mark a significant reorganization of the Holocene deep ocean circulation, and attribute the changes to a weakening of NEADW flow during the mid to late Holocene that allowed the shoaling of Lower Deep Water and deeper eastward advection of Labrador Sea Water into the northeast Atlantic Basin.
Related to:
Ellison, Christopher RW; Chapman, Mark R; Hall, Ian R (2006): (Table S1) Age determination of sediment core MD99-2251 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.829501
Ellison, Christopher RW; Chapman, Mark R; Hall, Ian R (2006): Surface and deep ocean interactions during the Cold Climate Event 8200 years ago. Science, 312(5782), 1929-1932, https://doi.org/10.1126/science.1127213
Coverage:
Median Latitude: 52.620833 * Median Longitude: -39.760944 * South-bound Latitude: 50.206667 * West-bound Longitude: -45.688000 * North-bound Latitude: 57.447833 * East-bound Longitude: -27.907833
Date/Time Start: 1995-06-18T00:00:00 * Date/Time End: 1999-08-01T00:00:00
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 15.340 m
Event(s):
HU91-045-093 * Latitude: 50.208000 * Longitude: -45.688000 * Elevation: -3448.0 m * Location: Labrador Sea * Method/Device: Box corer (BC)
MD95-2024 (MD952024) * Latitude: 50.206667 * Longitude: -45.687000 * Date/Time: 1995-06-18T00:00:00 * Elevation: -3539.0 m * Recovery: 29.52 m * Location: Orphan Knoll * Campaign: MD101 (IMAGES I) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO) * Comment: XX Sections, liquid pocket between sections X-XI, partially recovered in one bag
MD99-2251 * Latitude: 57.447833 * Longitude: -27.907833 * Date/Time: 1999-08-01T00:00:00 * Elevation: -2620.0 m * Recovery: 36.58 m * Location: Rockall * Campaign: MD114 (IMAGES V) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
Comment:
MD99-2251 originally published in Ellsion et al., (2006). Conversion to calendar years before present (cal. yrs BP) with CALIB 501 (Stuiver et al., 1993) using marine04 as calibration data set. Mean ages are the arithmetic means of the age ranges given by the program.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Age, dated material | Dated material | Hoogakker, Babette A A | |||
| 4 | Laboratory code/label | Lab label | Hoogakker, Babette A A | |||
| 5 | Age, dated | Age dated | ka | Hoogakker, Babette A A | Age, 14C AMS | |
| 6 | Age, dated standard deviation | Age dated std dev | ± | Hoogakker, Babette A A | Age, 14C AMS | 1 sigma |
| 7 | Age, minimum/young | Age min | ka | Hoogakker, Babette A A | Age, calibrated | 1 sigma, cal. BP |
| 8 | Age, maximum/old | Age max | ka | Hoogakker, Babette A A | Age, calibrated | 1 sigma, cal. BP |
| 9 | Age, minimum/young | Age min | ka | Hoogakker, Babette A A | Age, calibrated | 2 sigma, cal. BP |
| 10 | Age, maximum/old | Age max | ka | Hoogakker, Babette A A | Age, calibrated | 2 sigma, cal. BP |
| 11 | Calendar age | Cal age | ka BP | Hoogakker, Babette A A | Age, calibrated | 1 sigma |
| 12 | Calendar age | Cal age | ka BP | Hoogakker, Babette A A | Age, calibrated | 2 sigma |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
380 data points