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Darby, Dennis A; Bischof, Jens; Spielhagen, Robert F; Marshall, Steven A; Herman, Stephen W (2002): (Table 1) Arctic radiocarbon dates from sediment core PS1230-1. PANGAEA,, Supplement to: Darby, DA et al. (2002): Arctic ice export events and their potential impact on global climate during the late Pleistocene. Paleoceanography, 17(2), 1025,

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Ice sheets in the North American Arctic and, to a lesser extent, those in northern Eurasia calved large quantities of icebergs that drifted through Fram Strait into the Greenland Sea several times during the late Pleistocene. These icebergs deposited Fe oxide grains (45-250 mm) and coarse lithic clasts >250 mm matched to specific circum-Arctic sources. Four massive Arctic iceberg export events are identified from the Laurentide and the Innuitian ice sheets, between 14 and 34 ka (calendar years) in a sediment core from Fram Strait. These relatively short duration (<1-4 kyr) events contain 3-5 times the background levels of Fe oxide grains. They began suddenly, as indicated by a steep rise in the number of grains matched to an ice sheet source, suggesting rapid purges of ice through Fram Strait, due perhaps to collapse of ice sheets. The larger events from the northwestern Laurentide ice sheet are preceded by events from the Innuitian ice sheet. Despite the chronological uncertainties, the Arctic export events appear to occur prior to Heinrich events.
Latitude: 78.855300 * Longitude: -4.781200
Date/Time Start: 1984-08-16T00:00:00 * Date/Time End: 1984-08-16T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.445 m
PS1230-1 (GIK23230-1 PS05/416) * Latitude: 78.855300 * Longitude: -4.781200 * Date/Time: 1984-08-16T00:00:00 * Elevation: -1249.0 m * Penetration: 0.53 m * Recovery: 0.49 m * Location: Fram Strait * Campaign: ARK-II/4 (PS05) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Depth, top/minDepth topmDarby, Dennis A
3Depth, bottom/maxDepth botmDarby, Dennis A
4Age, datedAge datedkaDarby, Dennis AAge, 14C AMS13C corrected
5Age, datedAge datedkaDarby, Dennis AAge, 14C AMSReservoir corrected -400 yr
6Age, dated standard deviationAge dated std dev±Darby, Dennis A
7Sample code/labelSample labelDarby, Dennis ALaboratory number
84 data points

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