Rapid growth of hydrofluorocarbon 134a and hydrochlorofluorocarbons 141b, 142b, and 22 from Advanced Global Atmospheric Gases Experiment (AGAGE) observations at Cape Grim, Tasmania, and Mace Head, Ireland

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Read Full Article (file size: 810040 bytes) Cited by JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 109, D06310, doi:10.1029/2003JD004277, 2004 Rapid growth of hydrofluorocarbon 134a and hydrochlorofluorocarbons 141b, 142b, and 22 from Advanced Global Atmospheric Gases Experiment (AGAGE) observations at Cape Grim, Tasmania, and Mace Head, Ireland S. O'Doherty School of Chemistry, University of Bristol, Bristol, UK D. M. Cunnold School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA A. Manning Climate Research, UK Met Office, Bracknell, UK B. R. Miller Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA R. H. J. Wang School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA P. B. Krummel Atmospheric Research, Commonwealth Scientific and Industrial Research Organisation, Aspendale, Victoria, Australia P. J. Fraser Atmospheric Research, Commonwealth Scientific and Industrial Research Organisation, Aspendale, Victoria, Australia P. G. Simmonds School of Chemistry, University of Bristol, Bristol, UK A. McCulloch School of Chemistry, University of Bristol, Bristol, UK R. F. Weiss Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA P. Salameh Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA L. W. Porter Cape Grim Baseline Air Pollution Station, Bureau of Meteorology, Smithton, Tasmania, Australia R. G. Prinn Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA J. Huang Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA G. Sturrock Climate Research, UK Met Office, Bracknell, UK D. Ryall Climate Research, UK Met Office, Bracknell, UK R. G. Derwent Climate Research, UK Met Office, Bracknell, UK S. A. Montzka Climate Monitoring and Diagnostics Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado, USA Abstract An update of in situ Advanced Global Atmospheric Gases Experiment (AGAGE) hydrofluorocarbon (HFC)/hydrochlorofluorocarbon (HCFC) measurements made at Mace Head, Ireland, and Cape Grim, Tasmania, from 1998 to 2002 are reported. HCFC-142b, HCFC-141b, HCFC-22 and HFC-134a show continued rapid growth in the atmosphere at mean rates of 1.1, 1.6, 6.0, and 3.4 ppt/year, respectively. Emissions inferred from measurements are compared to recent estimates from consumption data. Minor updates to the industry estimates of emissions are reported together with a discussion of how to best determine OH concentrations from these trace gas measurements. In addition, AGAGE measurements and derived emissions are compared to those deduced from NOAA-Climate Monitoring and Diagnostics Laboratory flask measurements (which are mostly made at different locations). European emission estimates obtained from Mace Head pollution events using the Nuclear Accident Model (NAME) dispersion model and the best fit algorithm (known as simulated annealing) are presented as 3-year rolling average emissions over Europe for the period 1999–2001. Finally, the measurements of HCFC-141b, HCFC-142b, and HCFC-22 discussed in this paper have been combined with the Atmospheric Lifetime Experiment (ALE)/Global Atmospheric Gases Experiment (GAGE)/AGAGE measurements of CFC-11, CFC-12, CFC-113, CCl₄, and CH₃CCl₃ to produce the evolution of tropospheric chlorine loading. Received 23 October 2003; accepted 3 February 2004; published 26 March 2004. Index Terms: 0345 Atmospheric Composition and Structure: Pollution—urban and regional (0305); 0365 Atmospheric Composition and Structure: Troposphere—composition and chemistry; 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry; 1610 Global Change: Atmosphere (0315, 0325). Read Full Article (file size: 810040 bytes) Cited by Citation: O'Doherty, S., et al. (2004), Rapid growth of hydrofluorocarbon 134a and hydrochlorofluorocarbons 141b, 142b, and 22 from Advanced Global Atmospheric Gases Experiment (AGAGE) observations at Cape Grim, Tasmania, and Mace Head, Ireland, J. Geophys. Res., 109, D06310, doi:10.1029/2003JD004277. Copyright 2004 by the American Geophysical Union.

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