Bond, Gerard C; Broecker, Wallace S; Johnsen, Sigfús Jóhann; McManus, James; Labeyrie, Laurent D; Jouzel, Jean; Bonani, Georges (1993): (Table 1) Age determination of DSDP Hole 94-607 and sediment cores V30-101 and V23-81 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.769892, Supplement to: Bond, GC et al. (1993): Correlations between climate records from North Atlantic sediments and Greenland ice. Nature, 365(6442), 143-147, https://doi.org/10.1038/365143a0
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Abstract:
Oxygen isotope measurements in Greenland ice demonstrate that a series of rapid warm-cold oscillations -called Dansgaard-Oeschger events- punctuated the last glaciation (Dansgard et al., 1993, doi:10.1038/364218a0). Here we present records of sea surface temperature from North Atlantic sediments spanning the past 90 kyr which contain a series of rapid temperature oscillations closely matching those in the ice-core record, confirming predictions that the ocean must bear the imprint of the Dansgaard–Oeschger events (Broecker et al., 1988, doi:10.1016/0033-5894(88)90082-8; 1990, doi:10.1029/PA005i004p00469). Moreover, we show that between 20 and 80 kyr ago, the shifts in ocean-atmosphere temperature are bundled into cooling cycles, lasting on average 10 to 15 kyr, with asymmetrical saw-tooth shapes. Each cycle culminated in an enormous discharge of icebergs into the North Atlantic (a 'Hein-rich event' (Bond et al., 1992, doi:10.1038/360245a0; Broecker et al., 1992, doi:10.1007/BF00193540), followed by an abrupt shift to a warmer climate. These cycles document a previously unrecognized link between ice sheet behaviour and ocean-atmosphere temperature changes. An important question that remains to be resolved is whether the cycles are driven by external factors, such as orbital forcing, or by inter-nal ice-sheet dynamics.
Related to:
Broecker, Wallace S; Andree, Michael; Wolfli, Willy; Oeschger, Hans; Bonani, Georges; Kennett, James P; Peteet, Dorothy M (1988): The chronology of the last deglaciation: implications to the cause of the Younger Dryas event. Paleoceanography, 3(1), 1-19, https://doi.org/10.1029/PA003i001p00001
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 49.414933 * Median Longitude: -24.522733 * South-bound Latitude: 44.117000 * West-bound Longitude: -32.500000 * North-bound Latitude: 54.250000 * East-bound Longitude: -16.830000
Date/Time Start: 1966-10-18T00:00:00 * Date/Time End: 1983-07-22T00:00:00
Minimum DEPTH, sediment/rock: 0.565 m * Maximum DEPTH, sediment/rock: 3.930 m
Event(s):
94-609 * Latitude: 49.877800 * Longitude: -24.238200 * Date/Time: 1983-07-22T00:00:00 * Elevation: -3884.0 m * Penetration: 399.4 m * Recovery: 301.4 m * Location: North Atlantic/FLANK * Campaign: Leg94 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 380.2 m cored; 19.2 m drilled; 79.3 % recovery
Comment:
In30-101 Heinrich layer 4 at 0.8 m. V30-101 and V23-81 (2.1-3.93 m) AMS14C ages from analyses done at ETH-zürich for this work. V23-81 (1.545 - 1.985 m) from Broecker et al., 1988.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Depth, top/min | Depth top | m | Bond, Gerard C | ||
| 4 | Depth, bottom/max | Depth bot | m | Bond, Gerard C | ||
| 5 | Age, dated | Age dated | ka | Bond, Gerard C | Age, 14C calibrated | corrected for assumed 400-yr difference between surface-water carbon and atmospheric carbon |
| 6 | Age, dated standard deviation | Age dated std dev | ± | Bond, Gerard C | Age, 14C calibrated | |
| 7 | Age, dated material | Dated material | Bond, Gerard C |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
163 data points