# -------------------------------------------------------------------- # USE OF NOAA GML 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. To ensure that GML # receives fair credit for their work please include relevant citation # text in publications. We encourage users to contact the data providers, # who can provide detailed information about the measurements and # scientific insight. In cases where the data are central to a # publication, coauthorship for data providers may be appropriate. # # # # Contact: Xin Lan (xin.lan@noaa.gov) # # File Creation: Fri Apr 5 03:55:26 2024 # # # -------------------------------------------------------------------- # # # See gml.noaa.gov/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). # # Annual CO2 mole fraction increase (ppm) from Jan 1 through Dec 31. # # The uncertainty in the Mauna Loa annual mean growth rate is estimated # from the standard deviation of the differences between monthly mean # values determined independently by the Scripps Institution of Oceanography # and by NOAA/ESRL. # # 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 # # NOTE: Due to the eruption of the Mauna Loa Volcano, measurements from Mauna Loa Observatory # were suspended as of Nov. 29, 2022 and resumed in July 2023. # Observations starting from December 2022 to July 4, 2023 are from a site at the # Maunakea Observatories, approximately 21 miles north of the Mauna Loa Observatory. # year ann inc unc 1959 0.94 0.11 1960 0.50 0.11 1961 0.96 0.11 1962 0.64 0.11 1963 0.71 0.11 1964 0.32 0.11 1965 1.06 0.11 1966 1.28 0.11 1967 0.70 0.11 1968 1.06 0.11 1969 1.35 0.11 1970 1.00 0.11 1971 0.81 0.11 1972 1.74 0.11 1973 1.18 0.11 1974 0.95 0.11 1975 1.09 0.11 1976 0.79 0.11 1977 2.15 0.11 1978 1.31 0.11 1979 1.83 0.11 1980 1.68 0.11 1981 1.43 0.11 1982 0.86 0.11 1983 2.36 0.11 1984 1.51 0.11 1985 1.21 0.11 1986 1.47 0.11 1987 2.06 0.11 1988 2.24 0.11 1989 1.24 0.11 1990 1.20 0.11 1991 1.05 0.11 1992 0.49 0.11 1993 1.36 0.11 1994 1.95 0.11 1995 2.01 0.11 1996 1.24 0.11 1997 1.91 0.11 1998 2.97 0.11 1999 0.92 0.11 2000 1.62 0.11 2001 1.62 0.11 2002 2.51 0.11 2003 2.26 0.11 2004 1.59 0.11 2005 2.57 0.11 2006 1.69 0.11 2007 2.31 0.11 2008 1.54 0.11 2009 2.00 0.11 2010 2.30 0.11 2011 1.92 0.11 2012 2.65 0.11 2013 1.99 0.11 2014 2.17 0.11 2015 2.95 0.11 2016 3.03 0.11 2017 1.89 0.11 2018 2.85 0.11 2019 2.49 0.11 2020 2.27 0.11 2021 2.38 0.11 2022 1.81 0.11 2023 3.36 0.11