Thornalley, D. J. R., Bauch, H. A., Gebbie, G., Guo, W., Ziegler, M., Bernasconi, S. M., Barker, S. ![]() ![]() |
![]() |
PDF
- Accepted Post-Print Version
Download (3MB) |
Abstract
Changes in the formation of dense water in the Arctic Ocean and Nordic Seas [the “Arctic Mediterranean” (AM)] probably contributed to the altered climate of the last glacial period. We examined past changes in AM circulation by reconstructing radiocarbon ventilation ages of the deep Nordic Seas over the past 30,000 years. Our results show that the glacial deep AM was extremely poorly ventilated (ventilation ages of up to 10,000 years). Subsequent episodic overflow of aged water into the mid-depth North Atlantic occurred during deglaciation. Proxy data also suggest that the deep glacial AM was ~2° to 3°C warmer than modern temperatures; deglacial mixing of the deep AM with the upper ocean thus potentially contributed to the melting of sea ice, icebergs, and terminal ice-sheet margins.
Item Type: | Article |
---|---|
Date Type: | Publication |
Status: | Published |
Schools: | Earth and Environmental Sciences |
Subjects: | Q Science > QE Geology |
Publisher: | American Association for the Advancement of Science |
ISSN: | 0036-8075 |
Funders: | NERC |
Date of First Compliant Deposit: | 30 March 2016 |
Date of Acceptance: | 8 July 2015 |
Last Modified: | 07 Nov 2023 00:11 |
URI: | https://orca.cardiff.ac.uk/id/eprint/76298 |
Citation Data
Cited 61 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
![]() |
Edit Item |