CO2 Concentration (ppm) ---------------------------- Year MaunaLoa Global ---------------------------- 1958.208 315.71 * 1958.292 317.45 * 1958.375 317.50 * 1958.458 317.10 * 1958.542 315.86 * 1958.625 314.93 * 1958.708 313.20 * 1958.792 312.66 * 1958.875 313.33 * 1958.958 314.67 * 1959.042 315.62 * 1959.125 316.38 * 1959.208 316.71 * 1959.292 317.72 * 1959.375 318.29 * 1959.458 318.15 * 1959.542 316.54 * 1959.625 314.80 * 1959.708 313.84 * 1959.792 313.26 * 1959.875 314.80 * 1959.958 315.58 * 1960.042 316.43 * 1960.125 316.97 * 1960.208 317.58 * 1960.292 319.02 * 1960.375 320.03 * 1960.458 319.59 * 1960.542 318.18 * 1960.625 315.91 * 1960.708 314.16 * 1960.792 313.83 * 1960.875 315.00 * 1960.958 316.19 * 1961.042 316.93 * 1961.125 317.70 * 1961.208 318.54 * 1961.292 319.48 * 1961.375 320.58 * 1961.458 319.77 * 1961.542 318.57 * 1961.625 316.79 * 1961.708 314.80 * 1961.792 315.38 * 1961.875 316.10 * 1961.958 317.01 * 1962.042 317.94 * 1962.125 318.56 * 1962.208 319.68 * 1962.292 320.63 * 1962.375 321.01 * 1962.458 320.55 * 1962.542 319.58 * 1962.625 317.40 * 1962.708 316.26 * 1962.792 315.42 * 1962.875 316.69 * 1962.958 317.69 * 1963.042 318.74 * 1963.125 319.08 * 1963.208 319.86 * 1963.292 321.39 * 1963.375 322.25 * 1963.458 321.47 * 1963.542 319.74 * 1963.625 317.77 * 1963.708 316.21 * 1963.792 315.99 * 1963.875 317.12 * 1963.958 318.31 * 1964.042 319.57 * 1964.125 320.07 * 1964.208 320.73 * 1964.292 321.77 * 1964.375 322.25 * 1964.458 321.89 * 1964.542 320.44 * 1964.625 318.70 * 1964.708 316.70 * 1964.792 316.79 * 1964.875 317.79 * 1964.958 318.71 * 1965.042 319.44 * 1965.125 320.44 * 1965.208 320.89 * 1965.292 322.13 * 1965.375 322.16 * 1965.458 321.87 * 1965.542 321.39 * 1965.625 318.81 * 1965.708 317.81 * 1965.792 317.30 * 1965.875 318.87 * 1965.958 319.42 * 1966.042 320.62 * 1966.125 321.59 * 1966.208 322.39 * 1966.292 323.87 * 1966.375 324.01 * 1966.458 323.75 * 1966.542 322.39 * 1966.625 320.37 * 1966.708 318.64 * 1966.792 318.10 * 1966.875 319.79 * 1966.958 321.08 * 1967.042 322.07 * 1967.125 322.50 * 1967.208 323.04 * 1967.292 324.42 * 1967.375 325.00 * 1967.458 324.09 * 1967.542 322.55 * 1967.625 320.92 * 1967.708 319.31 * 1967.792 319.31 * 1967.875 320.72 * 1967.958 321.96 * 1968.042 322.57 * 1968.125 323.15 * 1968.208 323.89 * 1968.292 325.02 * 1968.375 325.57 * 1968.458 325.36 * 1968.542 324.14 * 1968.625 322.03 * 1968.708 320.41 * 1968.792 320.25 * 1968.875 321.31 * 1968.958 322.84 * 1969.042 324.00 * 1969.125 324.42 * 1969.208 325.64 * 1969.292 326.66 * 1969.375 327.34 * 1969.458 326.76 * 1969.542 325.88 * 1969.625 323.67 * 1969.708 322.38 * 1969.792 321.78 * 1969.875 322.85 * 1969.958 324.11 * 1970.042 325.03 * 1970.125 325.99 * 1970.208 326.87 * 1970.292 328.13 * 1970.375 328.07 * 1970.458 327.66 * 1970.542 326.35 * 1970.625 324.69 * 1970.708 323.10 * 1970.792 323.16 * 1970.875 323.98 * 1970.958 325.13 * 1971.042 326.17 * 1971.125 326.68 * 1971.208 327.18 * 1971.292 327.78 * 1971.375 328.92 * 1971.458 328.57 * 1971.542 327.34 * 1971.625 325.46 * 1971.708 323.36 * 1971.792 323.57 * 1971.875 324.80 * 1971.958 326.01 * 1972.042 326.77 * 1972.125 327.63 * 1972.208 327.75 * 1972.292 329.72 * 1972.375 330.07 * 1972.458 329.09 * 1972.542 328.05 * 1972.625 326.32 * 1972.708 324.93 * 1972.792 325.06 * 1972.875 326.50 * 1972.958 327.55 * 1973.042 328.54 * 1973.125 329.56 * 1973.208 330.30 * 1973.292 331.50 * 1973.375 332.48 * 1973.458 332.07 * 1973.542 330.87 * 1973.625 329.31 * 1973.708 327.51 * 1973.792 327.18 * 1973.875 328.16 * 1973.958 328.64 * 1974.042 329.35 * 1974.125 330.71 * 1974.208 331.48 * 1974.292 332.65 * 1974.375 333.20 * 1974.458 332.16 * 1974.542 331.07 * 1974.625 329.12 * 1974.708 327.32 * 1974.792 327.28 * 1974.875 328.30 * 1974.958 329.58 * 1975.042 330.73 * 1975.125 331.46 * 1975.208 331.90 * 1975.292 333.17 * 1975.375 333.94 * 1975.458 333.45 * 1975.542 331.98 * 1975.625 329.95 * 1975.708 328.50 * 1975.792 328.35 * 1975.875 329.37 * 1975.958 330.59 * 1976.042 331.59 * 1976.125 332.75 * 1976.208 333.52 * 1976.292 334.64 * 1976.375 334.77 * 1976.458 334.00 * 1976.542 333.06 * 1976.625 330.68 * 1976.708 328.95 * 1976.792 328.75 * 1976.875 330.15 * 1976.958 331.62 * 1977.042 332.66 * 1977.125 333.13 * 1977.208 334.95 * 1977.292 336.13 * 1977.375 336.93 * 1977.458 336.16 * 1977.542 334.88 * 1977.625 332.56 * 1977.708 331.29 * 1977.792 331.27 * 1977.875 332.41 * 1977.958 333.60 * 1978.042 334.95 * 1978.125 335.25 * 1978.208 336.66 * 1978.292 337.69 * 1978.375 338.03 * 1978.458 338.01 * 1978.542 336.40 * 1978.625 334.41 * 1978.708 332.37 * 1978.792 332.41 * 1978.875 333.75 * 1978.958 334.90 * 1979.042 336.14 * 1979.125 336.69 * 1979.208 338.27 * 1979.292 338.95 * 1979.375 339.21 * 1979.458 339.26 * 1979.542 337.54 * 1979.625 335.75 * 1979.708 333.98 * 1979.792 334.19 * 1979.875 335.31 * 1979.958 336.81 * 1980.042 337.90 338.45 1980.125 338.34 339.15 1980.208 340.01 339.46 1980.292 340.93 339.86 1980.375 341.48 340.29 1980.458 341.33 339.86 1980.542 339.40 338.34 1980.625 337.70 337.12 1980.708 336.19 336.95 1980.792 336.15 337.71 1980.875 337.27 338.83 1980.958 338.32 339.54 1981.042 339.29 340.09 1981.125 340.55 340.65 1981.208 341.61 341.28 1981.292 342.53 341.57 1981.375 343.04 341.29 1981.458 342.54 340.49 1981.542 340.78 339.10 1981.625 338.44 337.97 1981.708 336.95 337.86 1981.792 337.08 338.96 1981.875 338.58 340.07 1981.958 339.88 340.64 1982.042 340.96 341.27 1982.125 341.73 341.85 1982.208 342.82 342.13 1982.292 343.97 342.42 1982.375 344.63 342.27 1982.458 343.79 341.39 1982.542 342.32 339.66 1982.625 340.09 338.02 1982.708 338.28 338.08 1982.792 338.29 339.53 1982.875 339.60 340.86 1982.958 340.90 341.68 1983.042 341.68 342.27 1983.125 342.90 342.64 1983.208 343.33 342.93 1983.292 345.25 343.42 1983.375 346.03 343.75 1983.458 345.63 343.41 1983.542 344.19 342.05 1983.625 342.27 340.53 1983.708 340.35 340.44 1983.792 340.38 341.67 1983.875 341.59 342.74 1983.958 343.05 343.39 1984.042 344.10 344.22 1984.125 344.79 344.73 1984.208 345.52 344.86 1984.292 346.84 345.09 1984.375 347.63 345.24 1984.458 346.97 344.47 1984.542 345.53 343.11 1984.625 343.55 342.13 1984.708 341.40 342.04 1984.792 341.67 342.91 1984.875 343.10 344.08 1984.958 344.70 344.92 1985.042 345.21 345.27 1985.125 346.16 345.71 1985.208 347.74 346.55 1985.292 348.34 346.84 1985.375 349.06 346.68 1985.458 348.38 346.18 1985.542 346.72 344.86 1985.625 345.02 343.37 1985.708 343.27 343.30 1985.792 343.13 344.56 1985.875 344.49 345.69 1985.958 345.88 346.45 1986.042 346.56 347.01 1986.125 347.28 347.23 1986.208 348.01 347.60 1986.292 349.77 348.13 1986.375 350.38 348.23 1986.458 349.93 347.68 1986.542 348.16 346.22 1986.625 346.08 344.84 1986.708 345.22 344.77 1986.792 344.51 345.95 1986.875 345.93 347.22 1986.958 347.22 347.68 1987.042 348.52 347.94 1987.125 348.73 348.49 1987.208 349.73 349.21 1987.292 351.31 349.91 1987.375 352.09 350.20 1987.458 351.53 349.41 1987.542 350.11 347.81 1987.625 348.08 346.57 1987.708 346.52 346.65 1987.792 346.59 347.93 1987.875 347.96 349.20 1987.958 349.16 350.16 1988.042 350.39 350.87 1988.125 351.64 351.43 1988.208 352.41 351.81 1988.292 353.69 352.26 1988.375 354.21 352.43 1988.458 353.72 351.75 1988.542 352.69 350.27 1988.625 350.40 349.07 1988.708 348.92 349.27 1988.792 349.13 350.45 1988.875 350.20 351.62 1988.958 351.41 352.48 1989.042 352.91 353.03 1989.125 353.27 353.49 1989.208 353.96 354.04 1989.292 355.64 354.42 1989.375 355.86 354.23 1989.458 355.37 353.29 1989.542 353.99 351.58 1989.625 351.81 350.19 1989.708 350.05 350.52 1989.792 350.25 351.81 1989.875 351.49 352.98 1989.958 352.85 353.84 1990.042 353.80 354.39 1990.125 355.04 354.78 1990.208 355.73 355.08 1990.292 356.32 355.40 1990.375 357.32 355.31 1990.458 356.34 354.24 1990.542 354.84 352.63 1990.625 353.01 351.50 1990.708 351.31 351.71 1990.792 351.62 353.10 1990.875 353.07 354.34 1990.958 354.33 355.09 1991.042 354.84 355.66 1991.125 355.73 356.08 1991.208 357.23 356.54 1991.292 358.66 357.02 1991.375 359.13 357.00 1991.458 358.13 356.08 1991.542 356.19 354.43 1991.625 353.85 352.96 1991.708 352.25 352.83 1991.792 352.35 353.90 1991.875 353.81 355.06 1991.958 355.12 355.85 1992.042 356.25 356.42 1992.125 357.11 356.80 1992.208 357.86 357.16 1992.292 359.09 357.64 1992.375 359.59 357.73 1992.458 359.33 356.77 1992.542 357.01 355.09 1992.625 354.94 353.59 1992.708 352.96 353.49 1992.792 353.32 354.70 1992.875 354.32 355.87 1992.958 355.57 356.62 1993.042 357.00 357.08 1993.125 357.31 357.41 1993.208 358.47 357.82 1993.292 359.27 358.29 1993.375 360.19 358.23 1993.458 359.52 357.22 1993.542 357.33 355.63 1993.625 355.64 354.34 1993.708 354.03 354.35 1993.792 354.12 355.59 1993.875 355.41 356.83 1993.958 356.91 357.72 1994.042 358.24 358.34 1994.125 358.92 358.87 1994.208 359.99 359.22 1994.292 361.23 359.58 1994.375 361.65 359.62 1994.458 360.81 358.68 1994.542 359.38 357.15 1994.625 357.46 355.94 1994.708 355.73 355.90 1994.792 356.07 357.14 1994.875 357.53 358.57 1994.958 358.98 359.44 1995.042 359.92 360.00 1995.125 360.86 360.46 1995.208 361.83 360.89 1995.292 363.30 361.36 1995.375 363.69 361.32 1995.458 363.19 360.48 1995.542 361.64 358.85 1995.625 359.12 357.56 1995.708 358.17 357.90 1995.792 357.99 359.29 1995.875 359.45 360.62 1995.958 360.68 361.50 1996.042 362.07 361.99 1996.125 363.24 362.35 1996.208 364.17 362.67 1996.292 364.57 363.00 1996.375 365.13 363.14 1996.458 364.92 362.74 1996.542 363.55 361.43 1996.625 361.38 359.92 1996.708 359.54 359.56 1996.792 359.58 360.52 1996.875 360.89 361.63 1996.958 362.24 362.49 1997.042 363.09 363.13 1997.125 364.03 363.51 1997.208 364.51 363.86 1997.292 366.35 364.34 1997.375 366.64 364.38 1997.458 365.59 363.49 1997.542 364.31 361.81 1997.625 362.25 360.28 1997.708 360.29 360.27 1997.792 360.82 361.79 1997.875 362.49 363.46 1997.958 364.38 364.51 1998.042 365.26 365.07 1998.125 365.98 365.44 1998.208 367.24 365.82 1998.292 368.66 366.41 1998.375 369.42 366.71 1998.458 368.99 366.11 1998.542 367.82 364.68 1998.625 365.95 363.63 1998.708 364.02 363.86 1998.792 364.40 365.16 1998.875 365.52 366.42 1998.958 367.13 367.28 1999.042 368.18 367.95 1999.125 369.07 368.34 1999.208 369.68 368.73 1999.292 370.99 369.12 1999.375 370.96 369.03 1999.458 370.30 368.19 1999.542 369.45 366.53 1999.625 366.90 365.16 1999.708 364.81 365.27 1999.792 365.37 366.58 1999.875 366.72 367.89 1999.958 368.10 368.72 2000.042 369.29 369.21 2000.125 369.54 369.46 2000.208 370.60 369.78 2000.292 371.82 370.18 2000.375 371.58 370.08 2000.458 371.70 369.17 2000.542 369.86 367.79 2000.625 368.13 366.63 2000.708 367.00 366.57 2000.792 367.03 367.78 2000.875 368.37 369.12 2000.958 369.67 369.92 2001.042 370.59 370.52 2001.125 371.51 371.00 2001.208 372.43 371.40 2001.292 373.37 371.72 2001.375 373.85 371.63 2001.458 373.21 370.69 2001.542 371.51 369.29 2001.625 369.61 368.15 2001.708 368.18 368.20 2001.792 368.45 369.55 2001.875 369.76 370.89 2001.958 371.24 371.80 2002.042 372.53 372.33 2002.125 373.20 372.73 2002.208 374.12 373.21 2002.292 375.02 373.56 2002.375 375.76 373.53 2002.458 375.52 372.66 2002.542 374.01 371.25 2002.625 371.85 370.20 2002.708 370.75 370.52 2002.792 370.55 371.79 2002.875 372.25 373.11 2002.958 373.79 374.09 2003.042 374.88 374.79 2003.125 375.64 375.30 2003.208 376.46 375.71 2003.292 377.73 376.20 2003.375 378.60 376.36 2003.458 378.28 375.53 2003.542 376.70 373.98 2003.625 374.38 372.74 2003.708 373.17 372.90 2003.792 373.14 374.17 2003.875 374.66 375.47 2003.958 375.99 376.34 2004.042 377.00 377.02 2004.125 377.87 377.53 2004.208 378.88 377.96 2004.292 380.35 378.30 2004.375 380.62 378.23 2004.458 379.69 377.35 2004.542 377.47 375.81 2004.625 376.01 374.33 2004.708 374.25 374.22 2004.792 374.46 375.56 2004.875 376.16 377.03 2004.958 377.51 377.98 2005.042 378.46 378.54 2005.125 379.73 379.09 2005.208 380.77 379.69 2005.292 382.29 380.16 2005.375 382.45 380.27 2005.458 382.21 379.45 2005.542 380.74 377.78 2005.625 378.74 376.55 2005.708 376.70 376.58 2005.792 377.00 377.89 2005.875 378.35 379.35 2005.958 380.11 380.34 2006.042 381.38 381.09 2006.125 382.19 381.72 2006.208 382.67 382.12 2006.292 384.61 382.46 2006.375 385.03 382.41 2006.458 384.05 381.54 2006.542 382.46 379.88 2006.625 380.41 378.30 2006.708 378.85 378.42 2006.792 379.13 379.84 2006.875 380.15 381.21 2006.958 381.82 382.18 2007.042 382.89 382.81 2007.125 383.90 383.31 2007.208 384.58 383.78 2007.292 386.50 384.04 2007.375 386.56 383.91 2007.458 386.10 383.07 2007.542 384.50 381.36 2007.625 381.99 380.06 2007.708 380.96 380.45 2007.792 381.12 381.86 2007.875 382.45 383.20 2007.958 383.95 384.21 2008.042 385.52 384.99 2008.125 385.82 385.49 2008.208 386.03 385.89 2008.292 387.21 386.29 2008.375 388.54 386.26 2008.458 387.76 385.34 2008.542 386.35 383.87 2008.625 384.09 382.54 2008.708 383.18 382.30 2008.792 382.99 383.43 2008.875 384.19 384.92 2008.958 385.56 386.01 2009.042 386.94 386.80 2009.125 387.48 387.26 2009.208 388.82 387.49 2009.292 389.55 387.77 2009.375 390.14 387.73 2009.458 389.48 386.74 2009.542 388.03 384.80 2009.625 386.11 383.42 2009.708 384.74 383.72 2009.792 384.43 385.28 2009.875 386.02 386.74 2009.958 387.42 387.63 2010.042 388.71 388.42 2010.125 390.20 389.14 2010.208 391.17 389.48 2010.292 392.46 389.77 2010.375 393.00 389.74 2010.458 392.15 388.80 2010.542 390.20 387.16 2010.625 388.35 386.04 2010.708 386.85 386.50 2010.792 387.24 388.06 2010.875 388.67 389.43 2010.958 389.79 390.19 2011.042 391.33 390.74 2011.125 391.86 391.15 2011.208 392.60 391.46 2011.292 393.25 391.84 2011.375 394.19 391.87 2011.458 393.73 390.95 2011.542 392.51 389.01 2011.625 390.13 387.68 2011.708 389.08 388.08 2011.792 389.00 389.66 2011.875 390.28 391.02 2011.958 391.86 391.84 2012.042 393.12 392.41 2012.125 393.86 392.99 2012.208 394.40 393.53 2012.292 396.18 393.80 2012.375 396.74 393.68 2012.458 395.71 392.63 2012.542 394.36 390.81 2012.625 392.39 389.70 2012.708 391.11 390.35 2012.792 391.05 391.97 2012.875 392.98 393.37 2012.958 394.34 394.17 2013.042 395.55 394.86 2013.125 396.80 395.49 2013.208 397.43 396.07 2013.292 398.41 396.52 2013.375 399.78 396.53 2013.458 398.61 395.74 2013.542 397.32 394.27 2013.625 395.20 393.05 2013.708 393.45 393.01 2013.792 393.70 394.31 2013.875 395.16 395.76 2013.958 396.84 396.64 2014.042 397.85 397.27 2014.125 398.01 397.73 2014.208 399.77 398.03 2014.292 401.38 398.39 2014.375 401.78 398.47 2014.458 401.25 397.50 2014.542 399.10 395.91 2014.625 397.03 394.80 2014.708 395.38 394.89 2014.792 396.03 396.15 2014.875 397.28 397.63 2014.958 398.91 398.59 2015.042 399.98 399.30 2015.125 400.28 399.86 2015.208 401.54 400.30 2015.292 403.28 400.69 2015.375 403.96 400.64 2015.458 402.80 399.78 2015.542 401.31 398.12 2015.625 398.93 396.84 2015.708 397.63 397.15 2015.792 398.29 398.60 2015.875 400.16 400.15 2015.958 401.85 401.42 2016.042 402.52 402.36 2016.125 404.04 402.99 2016.208 404.83 403.57 2016.292 407.42 404.09 2016.375 407.70 404.16 2016.458 406.81 403.36 2016.542 404.39 401.83 2016.625 402.25 400.53 2016.708 401.03 400.69 2016.792 401.57 402.14 2016.875 403.53 403.51 2016.958 404.42 404.42 2017.042 406.13 405.12 2017.125 406.42 405.75 2017.208 407.18 406.12 2017.292 409.00 406.40 2017.375 409.65 406.52 2017.458 408.84 405.76 2017.542 407.07 403.95 2017.625 405.07 * 2017.708 403.38 * -----------------------------