Computer Science
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996gecoa..60.3305l&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 60, Issue 17, pp.3305-3309
Computer Science
3
Scientific paper
The 13 C/ 12 C and 18 O/ 16 O ratios of stem cellulose of Tamarix jordanis (a tree common in wadis of rid regions) increased with decreasing relative humidity (RH) in individual trees growing along a climatic gradient in Israel. The response to RH observed in the 18 O of the wood cellulose was strongly similar to that observed in leaf water over a diurnal cycle. Most of the data for 13 C and all of the data for 18 O could be fitted to two independent linear equations that, combined, allowed the reconstruction of RH and the 18 O of source water from the isotopic composition of ancient T. jordanis wood previously reported from the ancient fortress of Masada. Since the Roman period, RH at Masada decreased by about 17%, while the 18 O value of local groundwater remained similar to present-day values, suggesting that changing atmospheric circulation has played a role in climate change in the Middle East over the past two millennia.
Edwards Tim
Lipp Joseph
Trimborn Peter
Waisel Y.
Yakir Dan
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