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Montzka et al. 1993

Montzka, S.A., Myers, R.C., Butler, J.H., Elkins, J.W. and Cummings, S.O. (1993). Global tropospheric distribution and calibration scale of HCFC-22. Geophysical Research Letters 20: doi: 10.1029/93GL00573. issn: 0094-8276.

Measurements of atmospheric cholorodifluoromethane (HCFC-22), based upon a new calibration scale developed in this laboratory, suggest a global tropospheric mean that is ~28% lower than determined previously from surface-based measurements. A global mean of 101.8 (¿1.2, 1 s.d.) ppt and interhemispheric difference of 13(¿1) ppt were determined for HCFC-22 in 1992 from air collected in flasks from seven remote sites located between 82¿N and 90¿S. These results are consistent with mixing ratios predicted from recent emission estimates and a lifetime for HCFC-22 of 13.6 (+1.9, -1.5) yr. Based upon the analysis of flasks and archived air samples from mid-1987 through 1992, a mean growth rate for HCFC-22 of 7.3 (¿0.3)% yr-1 was estimated for this period. ¿ American Geophysical Union 1993

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	Abstract

Keywords
Atmospheric Composition and Structure, Troposphere—composition and chemistry, Atmospheric Composition and Structure, Instruments and techniques, Atmospheric Composition and Structure, General or miscellaneous

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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