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CHClF 2 (F‐22) in the Earth's atmosphere
Author(s) -
Rasmussen R. A.,
Khalil M. A. K.,
Penkett S. A.,
Prosser N. J. D.
Publication year - 1980
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl007i010p00809
Subject(s) - mixing ratio , atmosphere (unit) , environmental science , atmospheric sciences , mixing (physics) , meteorology , physics , quantum mechanics
Recent global measurements of CHClF 2 (F‐22) are reported. Originally, GC/MS techniques were used to obtain these data. Since then, significant advances using an O 2 ‐doped electron capture detector have been made in the analytical techniques, so that F‐22 can be measured by EC/GC methods at ambient concentrations. The atmospheric burden of F‐22 calculated from these measurements (average mixing ratio, mid‐1979, ∼45 pptv) is considerably greater than that expected from the estimates of direct industrial emissions (average mixing ratio, mid‐1979, ∼30 pptv). This difference is probably due to underestimates of F‐22 emissions.