Total organic carbon, delta13C, biomarker, diatom distributions in sediment core JM11-FI-19PC

DOI

In the light of rapidly diminishing sea ice cover in the Arctic during the present atmospheric warming, it is imperative to study the distribution of sea ice in the past in relation to rapid climate change. Here we focus on glacial millennial scale climatic events (Dansgaard/Oeschger events) using the new sea ice proxy IP25 in combination with phytoplankton proxy data and quantification of diatom species in a record from the SE Norwegian Sea. We demonstrate that expansion and retreat of sea ice varied consistently in pace with the rapid climate changes 90 ka to present, and with this present the first IP25 sea ice proxy record resolving the D/O cyclicity going back in time into Marine Isotope Stage 5a. Sea ice retreated abruptly at the start of warm interstadials, but spread rapidly during the cooling phase of the interstadials and became near-perennial and perennial during cold stadials and Heinrich events, respectively. Low salinity surface water and the sea ice edge spread to the Greenland-Scotland Ridge, and during the largest Heinrich events, probably far into the Atlantic Ocean.

Supplement to: Hoff, Ulrike; Rasmussen, Tine Lander; Stein, Ruediger; Ezat, Mohamed M; Fahl, Kirsten (2016): Sea ice and millennial-scale climate variability in the Nordic seas 90 ka to present. Nature Communications, 7, 10 pp

Identifier
DOI https://doi.org/10.1594/PANGAEA.859992
Related Identifier https://doi.org/10.1038/ncomms12247
Related Identifier https://doi.org/10.1594/PANGAEA.863447
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.859992
Provenance
Creator Hoff, Ulrike; Rasmussen, Tine Lander; Stein, Ruediger ORCID logo; Ezat, Mohamed M ORCID logo; Fahl, Kirsten ORCID logo
Publisher PANGAEA
Contributor Meyer, Hanno
Publication Year 2016
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 3773 data points
Discipline Earth System Research
Spatial Coverage (-3.867 LON, 62.833 LAT); Norwegian Sea