Broecker, Wallace S; Sanyal, A (1997): (Table 1) CaCO3 and He concentrations in sediment core TTN13-72 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.868835, Supplement to: Broecker, WS; Sanyal, A (1997): Magnitude of the CaCO3 dissolution events marking the onset of times of glaciation. Paleoceanography, 12(4), 530-532, https://doi.org/10.1029/97PA01020
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Abstract:
The availability of CaCO3 and 3He content results for core TT 13-72 from 4.3 km depth in the equatorial Pacific (Marcantonio et al., 1996, doi:10.1038/383705a0) allows the magnitude of the excess (i.e., over ambient) CaCO3 dissolution at the onset of marine glacial stages 10, 8, and 6 to be estimated. These three events are remarkably similar; during each an integrated loss of about 28 g CaCO3 per cm² occurred. While the magnitude of this loss is consistent with that expected from the interglacial to glacial pH shifts reconstructed based on boron isotope measurements on benthic foraminifera (Sanyal et al., 1995, doi:10.1038/373234a0), measurements at a number of other locations and water depths will be required before this approach can be used to evaluate the global toll of these dissolution events.
Related to:
Marcantonio, Franco; Anderson, Robert F; Stute, Martin; Kumar, Niraj; Schlosser, Peter; Mix, Alan C (1996): Extraterrestrial 3He as a tracer of marine sediment transport and accumulation. Nature, 383(6602), 705-707, https://doi.org/10.1038/383705a0
Coverage:
Latitude: 0.000000 * Longitude: -139.000000
Minimum DEPTH, sediment/rock: 3.28 m * Maximum DEPTH, sediment/rock: 7.47 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Broecker, Wallace S | Geocode | |
| 2 | Isotopic event | Isotopic event | Broecker, Wallace S | |||
| 3 | Difference | Diff | Broecker, Wallace S | Delta depth [m] | ||
| 4 | Calcium carbonate | CaCO3 | % | Broecker, Wallace S | ||
| 5 | Helium-3 | 3He | 10-10 cm3/g | Broecker, Wallace S | ||
| 6 | Helium-3 | 3He | 10-10 cm3/g | Broecker, Wallace S | normalized to non-CaCO3 content of sediment | |
| 7 | - | - | Broecker, Wallace S | missing CaCO3 [g/cm**2/cm] |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
92 data points