Urban Atmospheric 14CO and 14CH4 Measurements by Accelerator Mass Spectrometry
Issue Date
1986-01-01Keywords
Nevadapollution
mass spectra
spectra
human activity
C 14 C 13
environmental geology
Central Valley
Las Vegas Nevada
atmosphere
United States
carbon
isotopes
Metadata
Show full item recordCitation
Klouda, G. A., Currie, L. A., Donahue, D. J., Jull, A. J. T., & Naylor, M. H. (1986). Urban atmospheric 14CO and 14CH4 measurements by accelerator mass spectrometry. Radiocarbon, 28(2A), 625-633.Publisher
American Journal of ScienceJournal
RadiocarbonDescription
From the 12th International Radiocarbon Conference held in Trondheim, June 24-28, 1985.Additional Links
http://radiocarbon.webhost.uits.arizona.edu/Abstract
Atmospheric gas samples (0.1 m3) were collected at ground level during January/February 1984 in Las Vegas, Nevada for 14C/13C accelerator mass spectrometry and total abundance measurements of CO and CH4. During winter months in this locale, CO concentrations can occur at 10 to 100 times background, occasionally exceeding the National Ambient Air Quality Standard (NAAQS). Methane concentrations show a slight enhancement (-24%) above the background (non-urban troposphere) level. A comparison of CO and CH4 concentrations shows a good linear correlation which may indicate a common source. Preliminary 14C/13C results of the two species suggest that fossil emissions are the predominant source of excess CO and CH4 in the samples taken. Estimates of anthropogemc CO and CH4 are important for source apportionment of combustion emissions. In addition, this information is valuable for understanding the global CO and CH4 cycles and, therefore, human impact on climate and the stratospheric ozone layer.Type
Proceedingstext
Language
enISSN
0033-8222ae974a485f413a2113503eed53cd6c53
10.1017/S0033822200007815