Computer Science
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..61..283b&link_type=abstract
Earth and Planetary Science Letters, Volume 61, Issue 2, p. 283-290.
Computer Science
9
Scientific paper
A peat core from a raised bog covering the period 3100 to 2400 14C years B.P. has been analysed for D/H and 18O/16O ratios. These analyses were applied to cellulose, extracted from 56 successive layers of 1 cm thickness. D/H ratios were determined for the carbon bonded hydrogen; 18O/16O analyses were performed by applying a new method. For the interpretation of the results obtained on peat, the isotopic ratios of 11 living bog plant species were measured, showing a relatively large scatter. Most pronounced is a depletion in D of about 25‰ and in 18O of about 5‰ of the Sphagnum mosses relative to the vascular bog plants. This different isotopic composition is reflected by the δD and δ18O records of the peat core, because the abundance of the remains of non-vascular plants is variable. If this effect is taken account of, the remaining δD variations appear to be too large to be attributed to variations in the isotopic compositions of precipitation. As palaeoclimatic indicators the D/H and 18O/16O ratio qualitatively agree with the pollen analytical evidence for the climatic deterioration of the Subboreal-Subatlantic transition.
Brenninkmeijer Carl A. M.
Mook W. G.
van Geel B.
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