An ice-marginal δ18O record from Barnes Ice Cap, Baffin Island, Canada
2002 (English)In: Annals of Glaciology, ISSN 0260-3055, E-ISSN 1727-5644, Vol. 35, no 1, 145-149 p.Article in journal (Refereed) PublishedText
Barnes Ice Cap, Baffin Island, Canada, is a remnant of the Laurentide ice sheet that separated from it about 8500 years ago. Owing to recession of the ice cap during the Holocene, Pleistocene-age ice is now exposed along the margin in a distinctive bubble-rich white band. δ180 variations across the white ice resemble those in Canadian Arctic ice cores, suggesting that Barnes Ice Cap preserves a climatic record through thelast glacial period, possibly reaching back into the previous (Sangamon) interglacial. The δ180 shift at the Wisconsin-Holocene transition (15 per mil) exceeds that in other Canadian and Greenland records and cannot be explained solely in climatic terms. A steady-state model reconstruction of the Laurentide ice sheet during the Last Glacial Maximum suggests that Late-glacial strata in Barnes Ice Cap originated high up ( >2400 m a.s.l.) and far "inland" on the ice sheet, along a ridge that extended between the ancestral Foxe and Keewatin ice domes.
Place, publisher, year, edition, pages
2002. Vol. 35, no 1, 145-149 p.
Glaciers, Arctic, Canada, Barnes Ice Cap, Quaternary, stable isotopes
Research subject Earth Science with specialization in Physical Geography
IdentifiersURN: urn:nbn:se:uu:diva-300885DOI: 10.3189/172756402781817031ScopusID: 2-s2.0-0036965462OAI: oai:DiVA.org:uu-300885DiVA: diva2:952795