NDLI: Climatic significance of D/H and$^{13}$C/$^{12}$C ratios in Irish oak cellulose

Content Provider	Springer Nature Link
Author	Baillie, M. G. L. Pilcher, J. R. Pollard, A. M. Ramesh, R.
Copyright Year	2000
Abstract	δD and δ$^{13}$C analyses of cellulose nitrate from two modern Irish oak trees that form part of the 7400 year long chronology were carried out, covering a period of 123 years (1861–1983 A.D.) with a 5 year resolution so as to assess the potential of this long chronology for retrieval of palaeoenvironmental data. One of the trees (Q5293) showed significant correlations of δD, δ$^{13}$ C and ring width with mean annual temperatures as recorded at the Armagh weather station nearby and the mean fall temperatures of Central England. The other tree (Q5296) did not exhibit any significant climatic correlations either because it grew utilizing a nearby permanent source of ground water or because the intra-ring isotopic variations in Irish oak are significant enough to mask the climatic signal. Whilst our results have given a positive indication of the usefulness of these trees for palaeoenvironmental information, more trees need to be analysed to confirm our findings.Even though one of the trees did not exhibit climatic correlations, both trees show a significant positive correlation of δ$^{13}$C and a negative correlation of δD with ring width variations. Furthermore, two tree samples that grew during the 1620s B.C., when a volcano is thought to have erupted on the Aegean island of Santorini, show increased δD and decreased δ$^{13}$C for one to two decades following the eruption, though the magnitudes of change seem to vary with site and trees. We have proposed a possible mechanism based on tree phenology to explain both the above effects.
Starting Page	117
Ending Page	127
Page Count	11
File Format	PDF
ISSN	02534126
Journal	Journal of Earth System Science
Volume Number	109
Issue Number	1
e-ISSN	0973774X
Language	English
Publisher	Springer India
Publisher Date	2000-01-01
Publisher Institution	Indian Academy of Sciences
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tree-rings Irish oak hydrogen isotopes carbon isotopes palaeoclimate Geosciences Extraterrestrial Physics, Space Sciences
Content Type	Text
Resource Type	Article
Subject	1900/1901

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