Pinus longaeva (bristlecone pine) A pine species from California which is famous for its longevity and is used to develop an exceptionally long, arid-site, tree-ring chronology. The oldest living specimens date back more than 4600 years, but cross-dating these with remnants of dead bristlecone pines has extended the arid-site chronology to more than 8200 BP. A 5500-year chronology has been developed for bristlecone pines at the upper tree limit. These pines are also used to calibrate the radiocarbon dating method to allow for fluctuations in atmospheric ¹⁴C:¹²C ratios as revealed by measuring the ¹⁴C:¹²C ratios of individual tree-rings in the long, absolutely dated, tree-ring series. (Pinus longaeva is often confused with the similar, but shorter-lived, bristlecone pine P. aristata.) See also DENDROCHRONOLOGY.

Pinus longaeva(bristlecone pine) A pine species from California which is famous for its longevity and is used to develop an exceptionally long, arid-site, tree-ring chronology. The oldest living specimens date back more than 4600 years, but cross-dating these with remnants of dead bristlecone pines has extended the arid-site chronology to more than 8200bp. A 5500-year chronology has been developed for bristlecone pines at the upper tree limit. These pines are also used to calibrate the radiocarbon-dating method to allow for fluctuations in atmospheric ¹⁴C:¹²C ratios as revealed by measuring the ¹⁴C:¹²C ratios of individual tree rings in the long, absolutely dated, tree-ring series. (Pinus longaeva is often confused with the similar, but shorter-lived, bristlecone pine P. aristata.) See also dendrochronology.

Pinus longaeva (bristlecone pine) Pine species from California, famous for its longevity and used to develop an exceptionally long, arid-site, tree-ring chronology. The oldest living specimens date back more than 4600 years, but cross-dating these with remnants of dead bristlecone pines has extended the arid-site chronology to more than 8200 BP. A 5500-year chronology has been developed for bristlecone pines at the upper tree limit. These pines are also used to calibrate the radiocarbon-dating method to allow for fluctuations in atmospheric ¹⁴C:¹²C ratios as revealed by measuring ¹⁴C:¹²C ratios of individual tree rings in the long, absolutely dated, tree-ring series. See also DENDROCHRONOLOGY.

bristlecone pine See PINUS LONGAEVA.

bristlecone pine See Pinus longaeva.