Southern Ocean marine sediment core sea-ice records for the last 150,000 years

DOI

Antarctic sea ice forms a critical part of the Southern Ocean and global climate system. The behaviour of Antarctic sea ice throughout the last glacial-interglacial (G-IG) cycle (12,000-130,000 years) allows us to investigate the interactions between sea ice and climate under a large range of mean climate states. Understanding both temporal and spatial variations in Antarctic sea ice across a G-IG cycle is crucial to better understanding the G-IG regulation of atmospheric CO2, ocean circulation, nutrient cycling and productivity. Published qualitative and quantitative records of G-IG sea-ice, which cover at least 30,000 of the last 150,000 years, are compiled from twenty four marine sediment cores. All records include the combined relative abundances of the two sea-ice related diatoms Fragilariopsis curta and F. cylindrus (FCC). The FCC proxy is a qualitative indicator of winter sea-ice presence (Gersonde and Zielinski, 2000). Fourteen of the core records also have quantitative reconstructions of winter sea-ice concentrations (WSIC) and/or sea-ice duration (SID). These quantitative reconstructions were produced by applying a modern analog technique transfer function (Crosta et al., 1998; Esper & Gersonde 2014) to the preserved diatom species assemblages.

Identifier
DOI https://doi.org/10.1594/PANGAEA.943275
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Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.943275
Provenance
Creator Chadwick, Matthew ORCID logo; Crosta, Xavier ORCID logo; Esper, Oliver ORCID logo; Kohfeld, Karen E ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference Universität Bern https://doi.org/10.13039/100009068 Crossref Funder ID DSS_105 https://pastglobalchanges.org/science/wg/data-stewardship-scholarship PAGES Data Stewardship Scholarship
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 9358 data points
Discipline Earth System Research
Spatial Coverage (-151.220W, -61.790S, 160.241E, -43.700N); South Atlantic Ocean; Southeast Pacific; Scotia Sea; South Pacific Ocean; Atlantic Indik Ridge; Shona Ridge; Atlantic Ridge; South Atlantic; Conrad Rise; Southern Ocean; Scotia Sea, southwest Atlantic; Eastern Weddell Sea, Southern Ocean
Temporal Coverage Begin 1966-01-01T00:00:00Z
Temporal Coverage End 2009-12-29T21:50:00Z