title: Heavy methanes as atmospheric tracers.
abstract: Methane-21 ((13)CD(4)) is potentially a useful nonradioactive tracer for testing atmospheric transport and diffusion models on a continental scale. In an experiment to demonstrate this long-range utility, the release of 84 grams of methane-21 was detected at distances of 1500 to about 2500 kilometers at concentrations of about 1 part in 2 x 10(16) parts (by volume) in the air by a technique in which methane was separated and the methane-21 content was measured with a mass spectrometer.
authors.forename: G A
authors.initials: GA
authors.lastname: Cowan
authors.forename: D G
authors.initials: DG
authors.lastname: Ott
authors.forename: A
authors.initials: A
authors.lastname: Turkevich
authors.forename: L
authors.initials: L
authors.lastname: Machta
authors.forename: G J
authors.initials: GJ
authors.lastname: Ferber
authors.forename: N R
authors.initials: NR
authors.lastname: Daly