Decline in the tropospheric abundance of halogen from halocarbons: Implications for stratospheric ozone depletion

Science

Volumn 272, Issue 5266, 1996, Pages 1318-1322

  Montzka, Stephen A ^a   Butler, James H ^a   Myers, Richard C ^a   Thompson, Thayne M ^a   Swanson, Thomas H ^b   Clarke, Andrew D ^b   Lock, Loreen T ^b   Elkins, James W ^a  

^a EARTH SYSTEM RESEARCH LABORATORY   (United States)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ANTHROPOGENIC HALOCARBON; ATMOSPHERIC BROMINE; ATMOSPHERIC CHLORINE; OZONE DEPLETION; TROPOSPHERIC CHLORINE;

EID: 0030471280     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.272.5266.1318     Document Type: Article

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55. 3Br abundance; the maximum EECl or ECl would have occurred <0.5 year later. As an estimate for global tropospheric burden we use 10 ppt [J. M. Lobert et al., Science 267, 1002 (1995)].
56. 3Br abundance; the maximum EECl or ECl would have occurred <0.5 year later. As an estimate for global tropospheric burden we use 10 ppt [J. M. Lobert et al., Science 267, 1002 (1995)].
57. 3Br abundance; the maximum EECl or ECl would have occurred <0.5 year later. As an estimate for global tropospheric burden we use 10 ppt [J. M. Lobert et al., Science 267, 1002 (1995)].
58. 3Br abundance; the maximum EECl or ECl would have occurred <0.5 year later. As an estimate for global tropospheric burden we use 10 ppt [J. M. Lobert et al., Science 267, 1002 (1995)].
59. 3Br abundance; the maximum EECl or ECl would have occurred <0.5 year later. As an estimate for global tropospheric burden we use 10 ppt [J. M. Lobert et al., Science 267, 1002 (1995)].
60. 3Br abundance; the maximum EECl or ECl would have occurred <0.5 year later. As an estimate for global tropospheric burden we use 10 ppt [J. M. Lobert et al., Science 267, 1002 (1995)].
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63. U. Schmidt and A. Khedim, Geopnys. Res. Lett. 18, 763 (1991); K. A. Boering et al., ibid. 23, 2567 (1994); D.W. Fahey et al., Eos 76 (no. 46) (fall suppl.), 130 (1995); T. M. Hall and M. J. Prather, J. Geophys. Res. 98, 10573 (1993); T. M. Hall and R. A. Plum, ibid. 99, 1059 (1994).
64. U. Schmidt and A. Khedim, Geopnys. Res. Lett. 18, 763 (1991); K. A. Boering et al., ibid. 23, 2567 (1994); D.W. Fahey et al., Eos 76 (no. 46) (fall suppl.), 130 (1995); T. M. Hall and M. J. Prather, J. Geophys. Res. 98, 10573 (1993); T. M. Hall and R. A. Plum, ibid. 99, 1059 (1994).
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66. We are indebted to all personnel involved in collecting flask samples at the NOAA/CMDL Observatories and at cooperative sampling sites: P. J. Fraser and staff at the Cape Grim Baseline Air Pollution Station; M. Losleben (University of Colorado); and N. Trivett and staff at Alert Canada (Atmospheric Environment Service). We appreciate useful discussions with J. S. Daniel and the technical assistance of N. J. Condon. This work was supported in part by the Atmospheric Chemistry and Radiatively Important Trace Species components of NOAA's Climate and Global Change Program.