Record Details
Ice stratigraphy at the Pakitsoq ice margin, West Greenland, derived from gas records
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Ice stratigraphy at the Pakitsoq ice margin, West Greenland, derived from gas records |
| Names |
Schaefer, Hinrich
(creator) Petrenko, Vasilii V. (creator) Brook, Edward J. (creator) Severinghaus, Jeffrey P. (creator) Reeh, Niels (creator) Melton, Joe R. (creator) Mitchell, Logan (creator) |
| Date Issued | 2009-06 (iso8601) |
| Note | 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/. |
| Abstract | 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. |
| Genre | Article |
| Identifier | 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 |
