# --------------------------------------------------------------------
# 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 08:02:12 2024
# 
# 
# --------------------------------------------------------------------
# 
# 
# See gml.noaa.gov/ccgg/trends/ for additional details.
# 
#
# Uncertainties in the global annual means are estimated using two
# terms: The first is a bootstrap (resampling) method that varies the
# sites in our network. Each pseudo-network contains the same number of
# sites as our actual NOAA ESRL cooperative global air sampling network,
# but some are repeated and some are excluded. The second term is a
# Monte Carlo method that randomly modifies the data to account for
# measurement uncertainty. In both cases, 100 globally-averaged time
# series are created. Standard deviations of the annual means are
# calculated, and the two terms (network and analytical) are taken in
# quadrature to give the  reported uncertainties. Please see Dlugokencky
# et al., 1994, JGR, vol. 99, 17021-17043, for a complete discussion.
#
# N2O expressed as a mole fraction in dry air, nanomol/mol, abbreviated as ppb
#
# 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 change for the same
# reasons.  Usually these changes are minor.
# 

# year     mean      unc
  2001   316.36     0.13
  2002   316.94     0.13
  2003   317.63     0.14
  2004   318.26     0.13
  2005   318.91     0.12
  2006   319.82     0.12
  2007   320.44     0.13
  2008   321.50     0.14
  2009   322.27     0.12
  2010   323.19     0.12
  2011   324.21     0.13
  2012   325.05     0.12
  2013   325.94     0.12
  2014   327.09     0.12
  2015   328.17     0.11
  2016   328.95     0.11
  2017   329.74     0.13
  2018   330.90     0.13
  2019   331.88     0.12
  2020   333.03     0.13
  2021   334.31     0.12
  2022   335.65     0.12
  2023   336.71     0.12