******************************************************************************** **** Source: R.G. Prinn **** **** Massachusetts Institute of Technology **** **** Cambridge, Massachusetts, U.S.A. **** **** **** **** R.F. Weiss **** **** Scripps Institution of Oceanography **** **** La Jolla, California, U.S.A. **** **** **** **** F.N. Alyea, D.M. Cunnold **** **** Georgia Institute of Technology **** **** Atlanta, Georgia, U.S.A. **** **** **** **** P.J. Fraser **** **** Commonwealth Scientific and Industrial Research Organisation **** **** Aspendale, Victoria, Australia **** **** **** **** P.G. Simmonds **** **** University of Bristol **** **** Bristol, U.K. **** **** **** **** A.J. Crawford, R.A. Rasmussen **** **** Oregon Graduate Institute of Science and Technology **** **** Portland, Oregon, U.S.A. **** **** **** **** R.D. Rosen **** **** Atmospheric and Environmental Research, Inc. **** **** Cambridge, Massachusetts, U.S.A. **** ******************************************************************************** CFC-11 ALE 1978 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 158.2 159.1 159.0 159.5 160.7 162.1 -99.9 1979 160.4 161.0 160.3 161.8 163.6 165.1 165.7 166.3 167.7 169.1 169.4 171.0 165.1 1980 170.9 171.1 171.3 172.5 175.0 173.8 174.4 174.4 174.6 175.8 176.4 177.2 173.9 1981 178.1 178.5 179.4 181.2 182.1 182.1 181.8 184.1 186.4 187.3 188.2 188.9 183.1 1982 185.6 185.9 187.1 188.1 188.2 187.7 187.9 188.4 189.7 192.8 193.8 193.8 189.1 1983 192.5 194.0 194.3 196.4 198.1 198.3 197.6 199.5 198.4 200.5 201.9 201.3 197.7 CFC-12 ALE 1978 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 284.4 285.7 285.6 288.5 288.3 292.8 -99.9 1979 296.2 295.5 294.7 296.5 300.9 300.8 304.1 307.1 306.9 310.4 317.0 315.5 303.8 1980 312.4 312.5 316.6 319.0 321.9 323.1 325.5 326.7 327.4 328.7 331.1 330.7 323.0 1981 332.2 333.4 333.5 336.8 336.8 335.6 335.3 339.5 342.0 344.3 347.0 348.4 338.7 1982 343.9 345.4 347.1 350.1 348.7 354.6 355.5 357.8 361.2 364.4 366.0 364.9 355.0 1983 362.8 365.1 366.5 368.7 373.7 371.9 371.9 375.7 375.8 378.8 380.2 380.5 372.6 N2O ALE 1978 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 301.5 299.2 300.0 301.3 300.8 301.0 -99.9 1979 301.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 1980 -99.9 -99.9 -99.9 297.1 293.9 295.3 297.9 298.1 298.6 300.6 301.0 300.0 -99.9 1981 298.6 298.6 298.4 300.9 300.6 300.2 299.8 300.7 301.1 301.4 301.9 301.9 300.3 1982 303.2 303.5 303.8 304.3 303.7 304.6 304.1 303.7 303.3 302.7 303.1 303.4 303.6 1983 303.3 304.1 303.9 304.2 304.2 303.9 302.9 303.2 303.3 302.4 303.1 302.9 303.5