# --------------------------------------------------------------------

# USE OF NOAA ESRL DATA

#

# These data are made freely available to the public and the

# scientific community in the belief that their wide dissemination

# will lead to greater understanding and new scientific insights.

# The availability of these data does not constitute publication

# of the data. NOAA relies on the ethics and integrity of the user to

# insure that ESRL receives fair credit for their work. If the data

# are obtained for potential use in a publication or presentation,

# ESRL should be informed at the outset of the nature of this work.

# If the ESRL data are essential to the work, or if an important

# result or conclusion depends on the ESRL data, co-authorship

# may be appropriate. This should be discussed at an early stage in

# the work. Manuscripts using the ESRL data should be sent to ESRL

# for review before they are submitted for publication so we can

# insure that the quality and limitations of the data are accurately

# represented.

#

# Contact: Pieter Tans (303 497 6678; pieter.tans@noaa.gov)

#

# File Creation: Wed Jul 8 08:45:28 2015

#

# RECIPROCITY

#

# Use of these data implies an agreement to reciprocate.

# Laboratories making similar measurements agree to make their

# own data available to the general public and to the scientific

# community in an equally complete and easily accessible form.

# Modelers are encouraged to make available to the community,

# upon request, their own tools used in the interpretation

# of the ESRL data, namely well documented model code, transport

# fields, and additional information necessary for other

# scientists to repeat the work and to run modified versions.

# Model availability includes collaborative support for new

# users of the models.

# --------------------------------------------------------------------

#

#

# See www.esrl.noaa.gov/gmd/ccgg/trends/ for additional details.

#

# Data from March 1958 through April 1974 have been obtained by C. David Keeling

# of the Scripps Institution of Oceanography (SIO) and were obtained from the

# Scripps website (scrippsco2.ucsd.edu).

#

# The estimated uncertainty in the annual mean is the standard deviation

# of the differences of annual mean values determined independently by

# NOAA/ESRL and the Scripps Institution of Oceanography.

#

# NOTE: In general, the data presented for the last year are subject to change,

# depending on recalibration of the reference gas mixtures used, and other quality

# control procedures. Occasionally, earlier years may also be changed for the same

# reasons. Usually these changes are minor.

#

# CO2 expressed as a mole fraction in dry air, micromol/mol, abbreviated as ppm

#

# year mean unc

1959 315.97 0.12

1960 316.91 0.12

1961 317.64 0.12

1962 318.45 0.12

1963 318.99 0.12

1964 319.62 0.12

1965 320.04 0.12

1966 321.38 0.12

1967 322.16 0.12
1968 323.04 0.12

1969 324.62 0.12

1970 325.68 0.12

1971 326.32 0.12

1972 327.45 0.12

1973 329.68 0.12

1974 330.18 0.12

1975 331.08 0.12

1976 332.05 0.12

1977 333.78 0.12

1978 335.41 0.12

1979 336.78 0.12

1980 338.68 0.12

1981 340.10 0.12

1982 341.44 0.12

1983 343.03 0.12

1984 344.58 0.12

1985 346.04 0.12

1986 347.39 0.12

1987 349.16 0.12

1988 351.56 0.12

1989 353.07 0.12

1990 354.35 0.12

1991 355.57 0.12

1992 356.38 0.12

1993 357.07 0.12

1994 358.82 0.12

1995 360.80 0.12

1996 362.59 0.12

1997 363.71 0.12

1998 366.65 0.12

1999 368.33 0.12

2000 369.52 0.12

2001 371.13 0.12

2002 373.22 0.12

2003 375.77 0.12

2004 377.49 0.12

2005 379.80 0.12

2006 381.90 0.12

2007 383.76 0.12

2008 385.59 0.12

2009 387.37 0.12

2010 389.85 0.12

2011 391.63 0.12

2012 393.82 0.12

2013 396.48 0.12

2014 398.55 0.12