Ownsworth, Emma; Selby, David; Lloyd, Jeremy; Knutz, Paul; Szidat, Sönke; Andrews, John; Ó Cofaigh, Colm (2023). Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model. Quaternary science reviews, 308, p. 108082. Elsevier 10.1016/j.quascirev.2023.108082
|
Text
Ownsworth_Sediment_delivery_to_central_Baffin_Bay__QSR_2023_.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview |
Reconstructing former ice sheet history and glaciogenic sediment fluxes surrounding Baffin Bay during and since the Last Glacial Maximum (LGM) is a major scientific challenge. Here, a new multi-proxy analysis of sediments from a central Baffin Bay (BB) sediment core reveals two dominant sediment/discharge sources: 1) a detrital carbonate (BBDC; dolomite-rich) source that represents increased discharge from the NE Laurentide Ice Sheet (LIS) and southern Innuitian Ice Sheet (IIS), and 2) a radiogenic, felsic provenance likely from a west Greenland Ice Sheet (GIS) source, although a contribution from the Baffin Island LIS cannot be ruled out. By utilising a new method for radiocarbon calibration in high latitude polar environments we provide updated age constraints on BBDC1 (14.1e13 cal ka BP) and BBDC0 (12.0e10.9 cal ka BP). This coupled with our sediment analysis shows the BBDC layers to be coincident with the Bølling-Allerød (BBDC1) and the recovery from the Younger Dryas (BBDC0). The timing of BBDC1 also further supports the theory of an ice shelf covering northern Baffin Bay from the LGM and during initial deglaciation.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) 08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Szidat, Sönke |
Subjects: |
500 Science > 570 Life sciences; biology 500 Science > 540 Chemistry |
ISSN: |
0277-3791 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Sönke Szidat |
Date Deposited: |
02 Aug 2023 06:22 |
Last Modified: |
20 Aug 2023 02:37 |
Publisher DOI: |
10.1016/j.quascirev.2023.108082 |
BORIS DOI: |
10.48350/185160 |
URI: |
https://boris.unibe.ch/id/eprint/185160 |
Actions (login required)
 |
Edit item |