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Holocene 17 (6)
Title
The title of the publication or report
Title:
Holocene 17 (6)
Series
The series the publication or report is included in
Series:
The Holocene
Volume
Volume number and part
Volume:
17 (6)
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
Other resources which are relevant to this publication or report
Relations:
URI:
http://hol.sagepub.com/content/vol17/issue6/
Created Date
The date the record of the pubication was first entered
Created Date:
20 Aug 2008
Please click on an Article link to go to the Article Details.
Article Title
Access Type
Author / Editor
Page
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Abstract
Seasonality and the isotope hydrology of Lochnagar, a Scottish mountain lake: implications for palaeoclimate research
Jonathan J Tyler
Melanie J Leng
Carol Arrowsmith
717 - 727
The relationship between isotope ratios in precipitation and lake waters was monitored by bi-weekly measurements taken over a five and a half year period between May 2000 and September 2005 (a period of 1964 days) at Lochnagar, a remote mountain lake in eastern Scotland. Short-term changes in the oxygen isotope composition of lake water (18OL) at Lochnagar follow a seasonal pattern similar to isotopes in local precipitation (18OP), however changes in catchment residence time, snow accumulation, lake ice cover and lake stratification modify the temporal structure of 18OL over the seasonal cycle. Of particular importance is precipitation amount, which controls catchment and lake residence times, and determines the degree of phase lag and amplitude change between 18OL and 18OP. A simple mass balance model replicates these effects and demonstrates that the degree of phase lag and amplitude reduction is predictable given known input/volume ratio. The implications of these observations for the use of 18O records in palaeoclimatology are important, since it is rare that authigenic and biogenic minerals or organic compounds (from which 18O and/or 2H can be measured) are produced in a lake evenly throughout the year.
Blue intensity in Pinus sylvestris tree-rings; developing a new palaeoclimate proxy
Rochelle Campbell
Danny McCarroll
N J Loader
Grudd Håkan
Iain Robertson
Risto Jalkanen
821 - 828
Minimum blue intensity measurements of resin-extracted Pinus sylvestris (L.) samples, conducted using a flat-bed scanner and commercially available software, are shown to provide a robust and reliable surrogate for maximum latewood density. Blue intensity data from fifteen trees, from three stands, are reported relative to a standard blue-scale in a manner similar to grey-scale calibration in x-ray densitometry. The resulting time series are highly correlated with x-ray densitometry data generated from the same samples and preserve the same high level of signal strength. Sensitivity to summer climate variables is similar to that identified in the relative density record, demonstrating that minimum blue intensity can also be used for the study of climate change. While not a replacement for the powerful range of x-ray densitometry techniques, blue intensity provides an inexpensive and accessible alternative for accessing palaeoclimatic information.
Radiocarbon dating of thin pedogenic carbonate laminae from Holocene archaeological sites
Konstantin Pustovoytov
K Schmidt
Hermann Parzinger
835 - 843
It has previously been suggested that radiocarbon dating is applicable to pedogenic carbonate. However, the validity of radiocarbon dates from pedogenic carbonate remained poorly understood because of the relatively low resolution of chronological controls. In this study the authors compared the radiocarbon dates (a total of twenty-one) of thin (0.2--0.3 mm in thickness) laminae of pedogenic carbonate coatings on clasts from Holocene archaeological sites in the eastern Mediterranean and south Siberia with independently estimated age-ranges for these sites. A high correlation was obtained between the oldest laminae of coatings with the site ages. The 14C ages of pedogenic carbonate were systematically younger by c. 0.3--1.6 ka (mean c. 0.75 ka) compared with archaeological sites. This finding suggests that pedogenic carbonate -- despite potential complicating factors -- can be dated more accurately with 14C than has been generally appreciated.