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Stable carbon isotope variations in northwest Europe during the last glacial–interglacial transition

✍ Scribed by Chris S. M. Turney; David J. Beerling; Douglas D. Harkness; J. John Lowe; E. Marian Scott

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
160 KB
Volume
12
Category
Article
ISSN
0267-8179

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✦ Synopsis

Stable carbon isotope data that span part of the last glacial-interglacial transition (ca. 14-9 ka 14 C BP; ca. 15-11 ka cal. BP), and which derive from organ-specific plant macrofossils recovered from two lake sediment profiles in the UK and one in Norway, are compared. The recorded temporal variations show similar trends, which, over a millennial timescale appear to parallel the main drift in ␦ 18 O as determined for the GRIP ice-core. It is postulated that some smaller scale variations in the ␦ 13 C profiles may reflect the shorter term oscillations in ␦ 18 O values evident in the GRIP record, although this is less certain. Overall, however, the results suggest that stable carbon isotope measurements based on organ-specific terrestrial plant macrofossils may provide (i) a means for establishing correlations between terrestrial successions and (ii) additional paleoenvironmental information, as the apparent 'shadowing' of the GRIP record indicates a common forcing mechanism for both Greenland ␦ 18 O and northwest European ␦ 13 C variations. From the evidence available we suggest that the recorded ␦ 13 C variations reflect fluctuations in air temperature and/or changes in water vapour pressure in the atmosphere.

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