Pines, bristlecone

Leavitt, S.W. and Long, A 1992 Altitudinal differences in 5 C of bristlecone pine tree rings. Naturwissenschaften 79 178-180. 

Until the work of Zavarin and Snajberk (1973a), the only chemical information available on the bristlecone pines was the report by Haagen-Smit et al. (1950) that the major component of P. longaeva (at that time referred to as P. aristata) turpentine was a-pinene and, interestingly, that the optical rotation of a-pinene from P. longaeva and southern specimens of P. balfouriana was dextro rotatory (h-26.12° and +23.72°, respectively), whereas that of northern specimens of P. balfouriana was levo rotatory (-10.23°). 

Fig. 3.9 Map for Bristlecone pine discussion Pinus aristata (Ra.), Pinus longaeva (P.L), and Pinus balfouriana (P.b.)...

Hiebert, R. D. and Hamrick, J. L. 1983. Patterns and levels of genetic variation in Great Basin bristlecone pine, Pinus longaeva. Evolution 37 302-310. 

Suess, H. E., Bristlecone pine calibration of the radiocarbon timescale 5200 B.C. to the present, See Olsson 197a, p. 303-311, 1970a. 

We find the same periodicities in uranium and organic carbon concentrations versus depth in a sea core from the Santa Barbara Channel, and in carbon-14 variations in a sequence of Bristlecone pine from southern California. 

Cryptomeria japonica Santa 1 sea Barbara core Bristlecone Pine Greenland Ice Well... 

We used the measurements of organic carbon and uranium in a sea core, made by Paul R. Doose, Emil K. Kalil, and I. R. Kaplan of the University of California at Los Angeles, and we compared our stable isotope measurements with Hans Suess measurements of radiocarbon in the bristlecone pine ring sequence prepared by Wesley Fergusson, (see fig. 27), Suess at the University of California at San Diego, and Fergusson at the University of Arizona, Tucson. 

Conventional 14C date, t = 5730 years, no calibration for Bristlecone pine. fFirst number, sample, second number, oxalic acid standard. 

Fergusson, C. W., Dendrochronology of Bristlecone Pine, Pinus aristata. 

Suess, H. E., Bristlecone-pine Calibration of Radiocarbon Time 5200... 

Preliminary values for the samples measured by the TAMS method were reported at the Eleventh International Radiocarbon Conference, University of Washington, Seattle. These values were calculated with respect to bristlecone pine dendrochronologically dated wood and thus were expressed as a calibrated value in calendar years b.p. The TAMS values listed in Table II reflect a large number of subsequent measurements and are expressed in years b.p. by using the 5568-year half-life (37). 

Information derived from Bristlecone pines in California has helped scientists to date artifacts. 

Study of very old trees, such as the bristlecone pines in California, have allowed researchers to develop calibration curves that adjust the results of radiocarbon dating experiments for the variation in the ratio that... 

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