************************************************************* *** Source: Thomas J. Conway *** *** Pieter Tans *** *** Lee S. Waterman *** *** National Oceanic & Atmospheric Administration *** *** Climate Monitoring and Diagnostics Laboratory *** *** 325 Broadway *** *** Boulder, Colorado 80303 *** ************************************************************* 1971 -99.99 -99.99 -99.99 -99.99 332.2 330.2 323.7 317.7 318.7 322.9 327.3 331.1 -99.99 1972 333.4 334.2 334.1 334.5 335.3 333.3 325.7 319.1 322.0 327.3 330.7 333.5 330.3 1973 334.7 335.4 336.5 337.0 336.5 334.0 327.6 322.2 323.6 328.6 332.1 334.7 331.9 1974 337.0 337.8 337.8 337.6 338.7 338.1 330.6 323.1 323.7 329.0 333.3 335.7 333.5 1975 336.6 336.5 336.4 336.6 336.2 334.6 329.7 324.5 325.0 329.6 333.5 336.3 333.0 1976 337.5 337.8 338.5 338.9 338.1 335.7 330.0 324.8 325.1 329.6 333.1 336.0 333.8 1977 337.7 337.7 338.3 339.4 339.7 337.7 331.6 326.3 327.3 331.0 334.6 337.4 334.9 1978 339.9 341.0 341.0 341.1 340.9 338.9 333.4 327.4 327.7 332.4 337.1 339.0 336.7 1979 340.1 341.3 342.1 342.3 343.2 341.3 333.8 327.4 328.9 334.4 337.6 338.6 337.6 1980 341.0 342.7 343.3 344.3 345.1 342.9 337.3 332.2 332.5 337.0 340.6 343.0 340.2 1981 344.8 345.4 345.4 346.0 346.4 343.9 336.5 330.8 332.6 338.3 342.1 344.5 341.4 1982 346.2 347.3 347.8 347.6 347.6 345.6 339.6 333.3 333.2 338.4 342.3 344.9 342.8 1983 346.6 347.1 347.6 347.9 348.2 346.5 339.9 333.8 333.9 340.4 345.2 347.0 343.7 1984 349.0 350.4 349.9 349.7 350.3 348.4 341.4 335.9 337.5 341.4 344.9 348.1 345.6 1985 349.5 349.3 350.3 351.8 352.1 349.5 343.5 337.2 338.3 343.5 347.3 348.9 346.8 1986 350.7 352.9 353.4 353.1 353.0 350.3 344.0 338.8 341.9 347.5 350.3 352.0 349.0 1987 353.1 353.7 354.1 354.4 355.0 352.9 346.0 340.2 340.9 345.7 349.8 352.6 349.9 1988 355.6 357.0 357.2 357.8 357.6 354.9 348.1 343.1 345.0 350.5 355.0 358.1 353.3 1989 359.0 358.6 359.7 360.1 359.4 358.4 350.9 342.7 345.1 351.6 355.9 359.3 355.1 1990 360.6 361.0 361.6 361.6 361.4 356.7 348.5 344.5 346.8 352.7 356.5 359.8 356.0 1991 361.7 361.7 362.1 362.1 361.8 360.0 353.6 346.7 348.3 354.6 358.5 360.5 357.6 1992 361.8 362.0 362.3 362.7 362.5 360.1 353.9 347.2 348.1 352.6 356.7 360.7 357.6