Khoo, Wee Wei; Esper, Oliver; Xiao, Wenshen; Hefter, Jens; Müller, Juliane: Sea-ice distribution and ocean temperature variation in the Powell Basin and Scotia Sea, inferred from marine sediment cores PS118_63-1 and PS67/219-1 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965042 (dataset in review)
Abstract:
Presently, there is a scarcity of coastal (paleo) sea-ice reconstructions for periods prior to the Last Glacial Maximum. In this study, we investigated sea ice and ocean temperature proxies from marine sediment core PS118_63-1 from the Powell Basin, NW Weddell Sea. Past sea-ice characteristics inferred from the sea-ice biomarker IPSO25, alongside phytoplankton biomarkers, TOC, biogenic opal estimates and diatom assemblages provide a continuous record of past sea-ice conditions and ocean temperature variability, back to the Penultimate Glacial (ca. 145 ka BP). Our results reveal a highly dynamic sea-ice environment, characterized by significant shifts from perennial (sea) ice cover to more seasonal sea-ice cover to open ocean conditions, with no significant glacial-interglacial ocean temperature variability in the Powell Basin. Furthermore, latitudinal tracking of sea-ice distribution and sea surface temperature differences is enabled when comparing diatom-inferred data from the marine sediment core PS67/219-1.
Related to:
Xiao, Wenshen (2011): Late Quaternary climate variability in Southern Ocean Atlantic Sector. urn:nbn:de:gbv:46-00102009-10
Xiao, Wenshen; Esper, Oliver; Gersonde, Rainer (2016): Last Glacial - Holocene climate variability in the Atlantic sector of the Southern Ocean. Quaternary Science Reviews, 135, 115-137, https://doi.org/10.1016/j.quascirev.2016.01.023
Xiao, Wenshen; Frederichs, Thomas; Gersonde, Rainer; Kuhn, Gerhard; Esper, Oliver; Zhang, Xu (2016): Constraining the dating of late Quaternary marine sediment records from the Scotia Sea (Southern Ocean). Quaternary Geochronology, 31, 97-118, https://doi.org/10.1016/j.quageo.2015.11.003
Project(s):
Coverage:
Median Latitude: -59.822560 * Median Longitude: -45.978193 * South-bound Latitude: -61.123690 * West-bound Longitude: -47.733790 * North-bound Latitude: -57.220300 * East-bound Longitude: -42.467000
Date/Time Start: 2005-05-10T12:28:00 * Date/Time End: 2019-03-28T21:11:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
3 datasets
Download Data (login required; moratorium until 2024-07-24)
Datasets listed in this bundled publication
- Khoo, WW; Esper, O; Xiao, W et al. (in review): Sea ice-related diatoms of sediment core PS67/219-1. https://doi.pangaea.de/10.1594/PANGAEA.965045
- Khoo, WW; Esper, O; Xiao, W et al. (in review): Organic geochemistry and biomarkers of sediment core PS118_63-1. https://doi.pangaea.de/10.1594/PANGAEA.965043
- Khoo, WW; Esper, O; Xiao, W et al. (in review): Sea ice-related diatoms of sediment core PS118_63-1. https://doi.pangaea.de/10.1594/PANGAEA.965044