Affiliation:
1. Department of Chemistry, University of California, San Diego, La Jolla, CA 92093–0356, USA.
Abstract
Measurements of the oxygen isotope ratios (
18
O/
16
O and
17
O/
16
O) in atmospheric nitrous oxide (N
2
O) from La Jolla, Pasadena, and the White Mountain Research Station (elevation, 3801 meters) in California and the White Sands Missile Range in New Mexico show that N
2
O has a mass-independent composition. These data suggest the presence of a previously undefined atmospheric process. The La Jolla samples can be explained by a mixing between an atmospherically derived source of mass-independent N
2
O and biologically derived mass-dependent N
2
O. Possible origins of the mass-independent anomaly in N
2
O are discussed.
Publisher
American Association for the Advancement of Science (AAAS)
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