******************************************************************************** **** 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 -99.9 151.1 151.3 150.6 150.9 150.5 153.3 -99.9 1979 155.5 153.5 154.5 154.8 158.1 157.5 159.4 161.0 159.7 159.4 160.7 162.4 158.0 1980 162.9 163.6 166.8 166.0 166.4 167.3 168.6 169.5 169.8 168.6 171.4 172.2 167.7 1981 172.8 172.9 171.8 173.6 174.2 174.0 175.9 176.1 176.7 177.1 178.3 178.8 175.2 1982 180.2 180.6 180.9 181.7 182.9 183.8 184.9 187.2 186.9 186.7 188.0 189.6 184.4 1983 189.4 189.2 189.3 191.4 191.0 191.1 193.8 196.2 196.3 196.1 196.4 198.1 193.2 1984 198.4 198.9 200.1 199.4 200.0 200.9 202.5 205.4 204.8 205.4 204.6 206.5 202.2 1985 206.8 206.3 207.4 207.3 210.0 208.8 211.6 212.5 211.9 213.6 212.5 216.0 210.4 1986 215.4 217.2 217.5 219.3 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 CFC-11 GAGE 1985 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 214.1 213.6 215.1 213.9 216.4 -99.9 1986 215.4 216.9 217.2 216.8 219.4 222.4 224.6 225.6 227.2 226.1 227.1 228.6 222.2 1987 229.6 230.0 230.0 230.7 232.1 234.7 236.1 237.4 238.4 238.6 236.3 237.5 234.3 1988 239.4 239.3 238.4 238.3 240.6 242.4 244.2 244.7 246.1 240.2 244.0 246.4 242.0 1989 247.7 246.9 248.2 249.1 250.0 251.2 253.6 252.4 251.3 251.9 253.5 253.3 250.7 1990 255.1 254.7 -99.9 259.0 258.8 258.4 259.1 259.9 260.7 258.5 259.8 260.5 -99.9 1991 259.9 259.6 259.2 261.1 261.0 263.8 263.9 264.0 264.1 263.6 263.4 265.1 262.4 CFC-12 ALE 1978 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 279.5 280.7 278.9 279.9 278.6 284.1 -99.9 1979 287.5 285.8 287.6 291.0 291.3 291.2 294.7 298.9 297.0 297.8 297.4 298.7 293.2 1980 300.0 300.9 304.0 304.5 305.7 309.8 313.0 314.1 314.9 316.2 317.8 319.1 310.0 1981 319.9 320.7 317.1 320.9 322.4 322.4 326.9 327.7 330.7 332.0 333.3 330.0 325.3 1982 333.0 333.9 334.8 339.6 340.8 343.7 344.8 345.8 345.5 345.4 348.2 354.8 342.5 1983 354.8 354.4 354.9 354.9 354.2 354.6 360.0 364.5 365.1 364.6 365.1 367.1 359.5 1984 368.6 369.1 371.3 371.4 375.2 377.1 381.4 384.6 385.3 386.1 385.0 388.7 378.7 1985 389.4 389.6 391.0 391.4 396.0 394.4 399.8 401.1 400.0 402.5 400.7 406.4 396.9 1986 405.4 409.4 408.9 411.2 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 CFC-12 GAGE 1985 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 397.7 397.6 398.7 402.8 407.3 -99.9 1986 405.7 405.1 407.5 408.1 410.5 414.9 419.8 420.9 422.6 422.0 425.1 428.6 415.9 1987 428.6 427.0 427.1 428.4 430.2 433.7 436.0 439.2 441.5 440.1 441.3 443.0 434.7 1988 446.2 447.2 447.7 447.9 451.4 450.1 452.4 454.0 456.0 457.2 463.1 466.5 453.3 1989 466.6 -99.9 464.3 465.6 467.1 469.5 473.9 476.0 474.8 475.5 478.8 478.6 -99.9 1990 482.1 481.8 -99.9 484.1 486.3 488.0 490.4 491.6 492.4 489.3 492.1 493.5 -99.9 1991 493.9 493.9 493.2 496.4 496.6 499.2 501.0 504.3 504.2 503.8 503.4 506.6 499.7 N2O ALE 1978 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 296.6 298.8 298.6 298.9 299.3 298.4 -99.9 1979 299.2 300.8 299.7 301.0 300.1 300.1 299.6 299.2 299.8 300.2 300.1 300.1 300.0 1980 300.1 299.4 299.5 299.8 300.3 301.0 301.6 301.0 302.5 302.9 301.5 300.6 300.9 1981 300.7 300.6 300.5 301.0 300.2 300.2 300.0 300.2 300.7 301.0 301.2 300.7 300.6 1982 300.6 300.7 301.0 302.8 303.8 304.4 303.8 302.2 302.9 303.0 303.2 303.3 302.6 1983 302.9 303.1 303.5 302.9 302.2 301.0 301.7 302.7 302.4 302.6 302.6 302.5 302.5 1984 302.5 302.8 302.9 302.6 302.9 303.4 303.3 303.8 304.6 305.3 305.7 305.5 303.8 1985 305.3 305.5 305.5 305.7 306.4 306.5 305.8 305.2 305.5 305.9 305.5 305.7 305.7 1986 306.4 307.1 306.6 307.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 N2O GAGE 1985 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 305.2 305.5 306.3 305.4 305.3 -99.9 1986 305.5 305.9 306.6 306.3 305.9 306.8 306.9 307.0 307.2 306.8 306.8 307.0 306.6 1987 307.4 307.3 307.0 307.1 307.1 306.7 306.4 306.6 307.5 307.8 307.6 307.5 307.2 1988 307.4 307.4 307.0 307.1 307.0 307.2 307.2 307.1 307.7 307.3 307.4 307.2 307.3 1989 307.0 -99.9 307.5 307.7 307.8 308.0 308.0 306.4 306.8 307.1 306.8 307.1 -99.9 1990 306.9 306.8 -99.9 307.9 308.2 308.3 308.4 308.6 308.4 308.3 308.6 308.5 -99.9 1991 308.3 308.7 308.8 309.1 309.3 308.9 309.0 310.1 310.3 310.8 310.7 310.5 309.5