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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. 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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEvent
2 DEPTH, sediment/rockDepth sedmGeocode
3 Age, dated materialDated materialHoogakker, Babette A A
4 Laboratory code/labelLab labelHoogakker, Babette A A
5 Age, datedAge datedkaHoogakker, Babette A AAge, 14C AMS
6 Age, dated standard deviationAge dated std dev±Hoogakker, Babette A AAge, 14C AMS1 sigma
7 Age, minimum/youngAge minkaHoogakker, Babette A AAge, calibrated1 sigma, cal. BP
8 Age, maximum/oldAge maxkaHoogakker, Babette A AAge, calibrated1 sigma, cal. BP
9 Age, minimum/youngAge minkaHoogakker, Babette A AAge, calibrated2 sigma, cal. BP
10 Age, maximum/oldAge maxkaHoogakker, Babette A AAge, calibrated2 sigma, cal. BP
11 Calendar ageCal ageka BPHoogakker, Babette A AAge, calibrated1 sigma
12 Calendar ageCal ageka BPHoogakker, Babette A AAge, calibrated2 sigma
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
380 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Depth sed [m]		3 
Dated material		4 
Lab label		5 
Age dated [ka]
(Age, 14C AMS)		6 
Age dated std dev [±]
(1 sigma, Age, 14C AMS)		7 
Age min [ka]
(1 sigma, cal. BP, Age, calibr...)		8 
Age max [ka]
(1 sigma, cal. BP, Age, calibr...)		9 
Age min [ka]
(2 sigma, cal. BP, Age, calibr...)		10 
Age max [ka]
(2 sigma, cal. BP, Age, calibr...)		11 
Cal age [ka BP]
(1 sigma, Age, calibrated)		12 
Cal age [ka BP]
(2 sigma, Age, calibrated)
HU91-045-093 0.290Globigerina bulloidesSUERC-93162.2570.0351.8161.9101.7641.9681.8631.866
HU91-045-0930.430Globigerina bulloidesSUERC-93172.7820.0352.4422.6092.3682.6672.5262.518
MD95-2024 0.005Globigerina bulloidesSUERC-47411.5320.0251.0481.1320.9981.1681.0901.083
MD95-20240.255Globigerina bulloidesSUERC-47422.0170.0261.5301.6161.5101.6771.5731.594
MD95-20240.685Globigerina bulloidesSUERC-69372.8030.0262.4882.6122.4342.6812.5502.558
MD95-20241.005Globigerina bulloidesSUERC-47443.7450.0233.6233.7113.5783.7783.6673.678
MD95-20241.485Globigerina bulloidesSUERC-69384.2420.0264.3074.4014.2424.4244.3544.333
MD95-20241.725Globigerina bulloidesSUERC-82575.2480.0265.5785.6315.5615.6805.6055.621
MD95-20241.945Globigerina bulloidesSUERC-82585.5500.0265.8995.9625.8716.0035.9315.937
MD95-20242.505Globigerina bulloidesSUERC-113466.9810.0357.4347.5107.4177.5527.4727.485
MD95-20242.885Globigerina bulloidesSUERC-55537.9210.0308.3498.4088.3168.4538.3798.385
MD95-20243.285Globigerina bulloidesSUERC-69409.0430.0309.6679.8169.6039.8849.7429.744
MD95-20243.745Globigerina bulloidesSUERC-82599.4680.03110.24910.35910.22210.41610.30410.319
MD95-20244.345Globigerina bulloidesSUERC-694112.0810.04213.44713.59213.40213.66313.52013.533
MD95-20244.785Globigerina bulloidesSUERC-694213.4400.04715.23315.53515.12115.72915.38415.425
MD99-2251 0.000Globigerina bulloidesSUERC-30630.9910.0210.5480.6090.5260.6300.5790.578
MD99-22510.700Globigerina bulloidesSUERC-30671.0060.0180.5590.6180.5370.6370.5890.587
MD99-22511.400Globigerina bulloidesSUERC-30681.4030.0210.9150.9690.8961.0220.9420.959
MD99-22512.300Globigerina bulloidesSUERC-30691.6660.0241.2021.2671.1661.2821.2351.224
MD99-22512.800Globigerina bulloidesSUERC-51781.8880.0251.3891.4781.3541.5121.4341.433
MD99-22513.540Globigerina bulloidesSUERC-51792.0940.0231.6201.7091.5811.7681.6651.675
MD99-22514.100Globigerina bulloidesSUERC-30702.4690.0242.0612.1572.0242.2512.1092.138
MD99-22514.840Globigerina bulloidesSUERC-51822.5760.0252.2102.3072.1562.3232.2592.240
MD99-22515.600Globigerina bulloidesSUERC-30712.9950.0242.7302.7872.7142.8332.7592.774
MD99-22516.500Globigerina bulloidesSUERC-51833.6150.0303.4613.5553.4193.6093.5083.514
MD99-22517.400Globigerina bulloidesSUERC-30724.1000.0224.0954.1904.0934.1974.1434.195
MD99-22518.000Globigerina bulloidesSUERC-51844.3860.0224.4834.5794.4284.6214.5314.525
MD99-22518.600Globigerina bulloidesSUERC-30764.8640.0225.1305.2575.0585.2735.1945.166
MD99-22519.100Globigerina bulloidesSUERC-51855.1090.0245.4455.2275.3995.5705.3365.485
MD99-22519.440Globigerina bulloidesSUERC-51865.3850.0285.7075.8145.6595.8595.7615.759
MD99-225110.340Globigerina bulloidesSUERC-30796.3410.0316.7546.8546.7096.9056.8046.807
MD99-225110.940Globigerina bulloidesSUERC-51886.5670.0277.0467.1466.9847.1717.0967.078
MD99-225111.680Globigerina bulloidesSUERC-51897.3400.0267.7637.8477.7207.9007.8057.810
MD99-225112.200Globigerina bulloidesSUERC-51927.8150.0358.2418.3398.1878.3628.2908.275
MD99-225112.840Globigerina bulloidesSUERC-30828.4740.0279.0179.1248.9959.2099.0719.102
MD99-225113.640Globigerina bulloidesSUERC-30868.8680.0309.4839.5389.4559.5969.5119.526
MD99-225114.740Globigerina bulloidesSUERC-30879.3650.03410.17310.23110.13910.28510.20210.212
MD99-225115.340Globigerina bulloidesSUERC-51939.7370.03110.54510.61410.52010.67110.58010.596