Atmospheric lifetime experiment. 6. Results for carbon tetrachloride based on 3 years data

Journal Article · Thu Oct 20 04:00:00 EDT 1983 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JC088iC13p08427· OSTI ID:6813419

Simmonds, P G; Alyea, F N; Cardelino, C A; Cunnold, D M; Crawford, A J; Rasmussen, R A; Lane, B C; Lovelock, J E; Prinn, R G

The automated electron capture gas chromatographic determination of the atmospheric concentrations of CCl/sub 4/ are reported for the period July 1978 to June 1981 at five coastal monitoring stations. Adrigole (Ireland), Cape Meares (Oregon). Ragged Point (Barbados, West Indies), Point Matatula (American Samoa), and Cape Grim (Tasmania). Daily measurements at approximately 6-hourly intervals are always complimented by an equivalent number of on-site calibration measurements. Estimates of CCl/sub 4/ emissions to the atmosphere from known industrial sources are compared with the measured trends and the absolute values of the observed concentrations. A globally averaged atmospheric lifetime for CCl/sub 4/ is calculated by using an optimal estimation technique incorporating a nine-box model of the atmosphere. The average global concentration of CCl/sub 4/ from July 1978 to June 1981 in the lower troposphere was 118 pptv, and it was increasing 2.1 pptv/year over this period. Both the absolute concentration observed and its trend are consistent with the calculated releases of CCl/sub 4/ and its expected destruction by stratospheric photolysis.

• Research Organization: Department of Geochemistry, University of Bristol
• OSTI ID: 6813419
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 88:C13; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ATMOSPHERIC CHEMISTRY
CARBON TETRACHLORIDE
CHEMICAL COMPOSITION
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
EARTH ATMOSPHERE
GLOBAL ASPECTS
HALOGENATED ALIPHATIC HYDROCARBONS
MIXING RATIO
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
QUANTITY RATIO
TROPOSPHERE