Ollive, Agathe; Loftfield, Julia; Adolphi, Florian; Matthiessen, Jens; Geibert, Walter; Malter, Maylin: Authigenic 10Be/9Be ratios from Arctic marine sediments spanning the last 200 kyr [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993158 (dataset in review)
Abstract:
This dataset contains authigenic 10Be and 9Be measurements from Arctic deep-sea sediments. We determined authigenic 10Be/9Be ratios across specific intervals identified in Geibert et al. (2021), focusing on sections characterized by extrema in excess 230Th (230Thxs). These include low-230Thxs intervals associated with glacial periods and high-230Thxs intervals linked to interglacial periods. The 10Be/9Be ratio was used as a water-mass proxy to reconstruct the North Atlantic inflow in the Arctic Ocean across glacial–interglacial cycles. The ratio varies by more than an order of magnitude between North Atlantic inflow waters, which carry relatively high 10Be/9Be signatures, and Arctic river inputs, which exhibit much lower values. We observe uniformly low 10Be/9Be ratios across multiple basins and water depths during glacial periods, with values even lower than modern Arctic river endmembers. These results support the hypothesis proposed by Geibert et al. (2021) of a reduced North Atlantic inflow into the Arctic Ocean and the Nordic Seas during Pleistocene glacial intervals.
References:
Geibert, Walter; Matthiessen, Jens; Stimac, Ingrid; Wollenburg, Jutta Erika; Stein, Ruediger (2021): Glacial episodes of a freshwater Arctic Ocean covered by a thick ice shelf. Nature, https://doi.org/10.1038/s41586-021-03186-y
Funding:
Helmholtz Association of German Research Centres (HGF), grant/award no. VH-NG-1501: CLOC – Cosmic Links between Ocean sediments and Ice Cores
Coverage:
Median Latitude: 78.482069 * Median Longitude: -3.445778 * South-bound Latitude: 68.495000 * West-bound Longitude: -171.441667 * North-bound Latitude: 88.662000 * East-bound Longitude: 144.166200
Date/Time Start: 1984-08-20T00:00:00 * Date/Time End: 2014-08-23T01:09:00
Minimum Elevation: -2802.0 m * Maximum Elevation: -862.0 m
Event(s):
GIK23065-3 * Latitude: 68.495000 * Longitude: 0.818330 * Date/Time: 1986-07-09T00:00:00 * Elevation: -2802.0 m * Penetration: 7.85 m * Location: Norwegian Sea * Campaign: M2/2 * Basis: Meteor (1986) * Method/Device: Kasten corer (KAL)
PS51/038-4 * Latitude: 85.135000 * Longitude: -171.441667 * Date/Time: 1998-07-16T00:00:00 * Elevation: -1473.0 m * Recovery: 7.19 m * Location: Arctic Ocean * Campaign: ARK-XIV/1a (PS51) * Basis: Polarstern * Method/Device: Kasten corer (KAL)
PS72/396-5 * Latitude: 80.577800 * Longitude: -162.317900 * Date/Time: 2008-09-20T04:42:00 * Elevation: -2723.0 m * Penetration: 9 m * Recovery: 7.87 m * Location: Arctic Ocean * Campaign: ARK-XXIII/3 (PS72) * Basis: Polarstern * Method/Device: Kasten corer (KAL) * Comment: 8 core sections: 0.1-1.09, 1.09-2.08, 2.08-3.08, 3.08-4.07, 4.07-5.06, 5.06-6.05, 6.05-7.05, 7.05-7.86 m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Ollive, Agathe | Core | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Ollive, Agathe | Geocode | |
| 3 | Sample code/label | Sample label | Ollive, Agathe | Sample Name | ||
| 4 | LATITUDE | Latitude | Ollive, Agathe | Geocode | ||
| 5 | LONGITUDE | Longitude | Ollive, Agathe | Geocode | ||
| 6 | ELEVATION | Elevation | m a.s.l. | Ollive, Agathe | Geocode | |
| 7 | Beryllium-9 | 9Be | atoms/g | Ollive, Agathe | Inductively coupled plasma-optical emission spectrophotometry (ICP-OES) | authigenic |
| 8 | Beryllium-9, uncertainty, relative | 9Be unc rel | % | Ollive, Agathe | ||
| 9 | Beryllium-10 | 10Be | atoms/g | Ollive, Agathe | Accelerator mass spectrometry (AMS) | authigenic |
| 10 | Beryllium-10, uncertainty, relative | 10Be unc rel | % | Ollive, Agathe | ||
| 11 | Beryllium-10/Beryllium-9 ratio | 10Be/9Be | Ollive, Agathe | authigenic | ||
| 12 | Beryllium-10/Beryllium-9 ratio, uncertainty, relative | 10Be/9Be unc rel | % | Ollive, Agathe |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
825 data points