Ice stratigraphy at the Pakitsoq ice margin, West Greenland, derived from gas records Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/ng451k10n

This is the publisher’s final pdf. The published article is copyrighted by the International Glaciological Society and can be found at:  http://www.igsoc.org/journal/.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Horizontal ice-core sites, where ancient ice is exposed at the glacier surface, offer unique opportunities for paleo-studies of trace components requiring large sample volumes. Following previous work at the Pâkitsoq ice margin in West Greenland, we use a combination of geochemical parameters measured in the ice matrix (δ¹⁸O[subscript ice]) and air occlusions (δ¹⁸O[subscript atm], δ¹⁵N of N₂ and methane concentration) to date ice layers from specific climatic intervals. The data presented here expand our understanding of the stratigraphy and three-dimensional structure of ice layers outcropping at Pâkitsoq. Sections containing ice from every distinct climatic interval during Termination I, including Last Glacial Maximum, Bølling/Allerød, Younger Dryas and the early Holocene, are identified. In the early Holocene, we find evidence for climatic fluctuations similar to signals found in deep ice cores from Greenland. A second glacial-interglacial transition exposed at the extreme margin of the ice is identified as another outcrop of Termination I (rather than the onset of the Eemian interglacial as postulated in earlier work). Consequently, the main structural feature at Pâkitsoq is a large-scale anticline with accordion-type folding in both exposed sequences of the glacial-Holocene transition, leading to multiple layer duplications and age reversals.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Schaefer, H., Petrenko, V. V., Brook, E. J., Severinghaus, J. P., Reeh, N., Melton, J. R., & Mitchell, L. (2009, June). Ice stratigraphy at the Pâkitsoq ice margin, West Greenland, derived from gas records. Journal of Glaciology, 55(191), 411-421. doi:10.3189/002214309788816704
Series
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-01-31T02:14:48Z (GMT). No. of bitstreams: 1 BrookEdwardCEOASIceStratigraphyPakitsoq.pdf: 796011 bytes, checksum: 5a74554af5bb6e0d1935632d6b1c6645 (MD5) Previous issue date: 2009-06
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-01-31T02:14:48Z No. of bitstreams: 1 BrookEdwardCEOASIceStratigraphyPakitsoq.pdf: 796011 bytes, checksum: 5a74554af5bb6e0d1935632d6b1c6645 (MD5)

Relationships

In Administrative Set:
Last modified: 07/21/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items