Belt, Simon T; Smik, Lukas; Brown, Thomas A; Kim, Jung-Hyun; Rowland, Steve J; Allen, Claire Susannah; Gal, Jong-Ku; Shin, Kyung-Hoon; Lee, Jae Il; Taylor, Kyle W R (2016): Concentrations of IPSO25 in surface sediments from coastal and near-coastal Antarctic locations [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.864502, Supplement to: Belt, ST et al. (2016): Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25. Nature Communications, 7, 12655, https://doi.org/10.1038/ncomms12655
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Abstract:
The presence of a di-unsaturated highly branched isoprenoid (HBI) lipid biomarker (diene II) in Southern Ocean sediments has previously been proposed as a proxy measure of palaeo Antarctic sea ice. Here we show that a source of diene II is the sympagic diatom Berkeleya adeliensis Medlin. Furthermore, the propensity for B. adeliensis to flourish in platelet ice is reflected by an offshore downward gradient in diene II concentration in >100 surface sediments from Antarctic coastal and near-coastal environments. Since platelet ice formation is strongly associated with super-cooled freshwater inflow, we further hypothesize that sedimentary diene II provides a potentially sensitive proxy indicator of landfast sea ice influenced by meltwater discharge from nearby glaciers and ice shelves, and re-examination of some previous diene II downcore records supports this hypothesis. The term IPSO25-Ice Proxy for the Southern Ocean with 25 carbon atoms-is proposed as a proxy name for diene II.
Coverage:
Median Latitude: -69.792785 * Median Longitude: -16.035660 * South-bound Latitude: -77.530000 * West-bound Longitude: -67.610000 * North-bound Latitude: -61.285667 * East-bound Longitude: 35.311500
Date/Time Start: 1983-11-26T00:00:00 * Date/Time End: 1991-03-13T19:18:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
PS1138-8 (PS04/225) * Latitude: -62.273300 * Longitude: -57.645001 * Date/Time: 1983-11-26T00:00:00 * Elevation: -1985.0 m * Penetration: 0.55 m * Recovery: 0.55 m * Location: King George Island, Antarctic Peninsula * Campaign: ANT-II/3 (PS04) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
PS1273-1 (PS06/289) * Latitude: -75.165000 * Longitude: -27.335000 * Date/Time: 1985-02-02T00:00:00 * Elevation: -333.0 m * Location: Halley Bay * Campaign: ANT-III/3 (PS06 SIBEX) * Basis: Polarstern * Method/Device: Giant box corer (GKG) * Comment: AUSGESIEBTE GESTEINE
PS1277-1 (PS06/303) * Latitude: -77.530000 * Longitude: -43.661700 * Date/Time: 1985-02-06T00:00:00 * Elevation: -415.0 m * Penetration: 0.22 m * Recovery: 0.22 m * Location: Gould Bay * Campaign: ANT-III/3 (PS06 SIBEX) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Campaign of event | Campaign | Belt, Simon T | |||
| 2 | Location of event | Location | Belt, Simon T | |||
| 3 | Event label | Event | Belt, Simon T | |||
| 4 | Optional event label | Event 2 | Belt, Simon T | |||
| 5 | Date/Time of event | Date/Time | Belt, Simon T | |||
| 6 | Latitude of event | Latitude | Belt, Simon T | |||
| 7 | Longitude of event | Longitude | Belt, Simon T | |||
| 8 | Elevation of event | Elevation | m | Belt, Simon T | ||
| 9 | DEPTH, sediment/rock | Depth sed | m | Belt, Simon T | Geocode | |
| 10 | Ice Proxy for the Southern Ocean with 25 carbon atoms per unit sediment mass | IPSO25/sed | ng/g | Belt, Simon T | Gas chromatography - Mass spectrometry (GC-MS) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
57 data points