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Holocene 17 (3)
Title
The title of the publication or report
Title:
Holocene 17 (3)
Series
The series the publication or report is included in
Series:
The Holocene
Volume
Volume number and part
Volume:
17 (3)
Publication Type
The type of publication - report, monograph, journal article or chapter from a book
Publication Type:
Journal
Editor
The editor of the publication or report
Editor:
John A Matthews
Publisher
The publisher of the publication or report
Publisher:
Sage Publications
Year of Publication
The year the book, article or report was published
Year of Publication:
2007
Source
Where the record has come from or which dataset it was orginally included in.
Source:
BIAB (The British & Irish Archaeological Bibliography (BIAB))
Relations
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Relations:
URI:
http://hol.sagepub.com/content/vol17/issue3/
Created Date
The date the record of the pubication was first entered
Created Date:
30 Jul 2007
Please click on an Article link to go to the Article Details.
Article Title
Access Type
Author / Editor
Page
Start/End
Abstract
Methane gas release from the Storegga submarine landslide linked to early Holocene climate change: a speculative hypothesis
James E Beget
Jason A Addison
291 - 295
The 3000 km3 Storegga submarine landslide occurred c. 8150 years ago from an area rich in gas hydrates off the western coast of Norway. A synchronous increase of 80--100 ppb in atmospheric methane concentrations is recorded in the Greenland GRIP ice core. This increase is hypothesized to reflect methane releases from the Storegga slide debris at an estimated rate of 20--25 Tg/yr for several hundred years following the slide. Methane is a powerful greenhouse gas, and methane release from the Storegga submarine landslide may have contributed to the rapid termination of the brief but intense 8200 yr cold event and the subsequent evolution of Holocene climate.
Age and significance of aeolian sediment reworking on high plateaux in the Scottish Highlands
Stefan M Morrocco
Colin K Ballantyne
Joel Q G Spencer
Ruth A J Robinson
349 - 360
Holocene aeolian sand sheets at the margins of high-level deflation surfaces in the Scottish Highlands commonly comprise two units: a lower weathered unit representing slow accumulation throughout much or all of the Holocene, and an upper unit of structureless sand that is inferred to represent recent erosion of aeolian deposits and aeolisols from adjacent plateaux. OSL dating of samples from above and below the upper--lower unit contact at three sites in northwest Scotland places the onset of upper unit sediment accumulation within the interval AD 1550--1700. Accumulation rates calculated from OSL ages confirm rapid accumulation of upper-unit deposits. The timing of the onset of upper-unit sand accumulation excludes expansion of sheep grazing, intrinsic instability and atmospheric pollution as triggers of plateau-surface vegetation degradation and consequent erosion, but favours climatic deterioration (increased wind stress and possibly prolonged snow-lie) during the `Little Ice Age' as the likely cause. This explanation does not, however, apply in all cases; at an OSL-dated site in the Grampian Highlands upper-unit aeolian sand accumulation commenced around AD 1900.
Characterizing carbon isotopic variability in Sphagnum
N J Loader
Danny McCarroll
Willem O Knaap, van der
Iain Robertson
Mary Gagen
403 - 410
To understand more fully the nature of isotopic fractionation in mosses and to explore the potential of stable isotope analyses of selected peat constituents for palaeoenvironmental research, the authors present results from a study of inter- and intra-plant 13C variability in Sphagnum spp. Subdivisions of stem, pendant and horizontal branch elements of modern Sphagnum capillifolium plants revealed consistent and statistically significant differences in their isotopic composition. Sequential (downstem) analysis of a further cohort of four modern Sphagnum capillifolium plants also reveals evidence of common forcing on the isotopic composition of sequentially formed stem and branch increments. This relationship was tested further by analysis of a series of branch and stem samples manually recovered from Sphagnum fuscum preserved within a late Holocene (AD 2003--1970) peat monolith from a European mire. The high degree of isotopic coherence observed between plants supports the analysis of Sphagnum in palaeoecological investigations. However inter- and intra-plant variability between both branch and stem sections emphasize the need for representative sampling, replication and sample homogeneity when conducting palaeoecological studies.
