Variation of concentration, 14C activity and 13C/12C ratios of CO2 in air samples from Kitt Peak, Arizona

S. W. Leavitt, A. Long

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Air was sampled with 5L flasks at Kitt Peak (2100 m elev) from 1983 through 1984 at approximately monthly intervals. The Kitt Peak CO2 concentrations, represented by a yield measurement, fluctuated c25% over the monitoring period. The δ13C values (uncorrected for N2O) varied from c-7.6 to -9.0‰, with high values (and low CO2 yields) in the late summer consistent with hemispheric seasonal biosphere effects. 14C activity of four Kitt Peak samples range from 1.158±.007 to 1.223±.008 as uncorrected fraction of modern, below free air activity of c1.250 for 1984 even after correcting for fractionation. -from Authors

Original languageEnglish (US)
Pages (from-to)464-468
Number of pages5
Issue number3
StatePublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Archaeology
  • Earth and Planetary Sciences(all)


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