# number_of_header_lines: 70
# comment:  
# comment:  ************ USE OF ESRL GMD DATA ****************
# comment:  
# comment: These data are made freely available to the public and the
# comment: scientific community in the belief that their wide dissemination
# comment: will lead to greater understanding and new scientific insights.
# comment: The availability of these data does not constitute publication
# comment: of the data.  NOAA relies on the ethics and integrity of the user to
# comment: insure that ESRL receives fair credit for their work.  If the data 
# comment: are obtained for potential use in a publication or presentation, 
# comment: ESRL should be informed at the outset of the nature of this work.  
# comment: If the ESRL data are essential to the work, or if an important 
# comment: result or conclusion depends on the ESRL data, co-authorship
# comment: may be appropriate.  This should be discussed at an early stage in
# comment: the work.  Manuscripts using the ESRL data should be sent to ESRL
# comment: for review before they are submitted for publication so we can
# comment: insure that the quality and limitations of the data are accurately
# comment: represented.
# comment:  
# comment: Every effort is made to produce the most accurate and precise
# comment: measurements possible.  However, we reserve the right to make
# comment: corrections to the data based on recalibration of standard gases
# comment: or for other reasons deemed scientifically justified.
# comment: 
# comment: We are not responsible for results and conclusions based on use
# comment: of these data without regard to this warning.
# comment: 
# contact_parameter: CO2O18 SIL (Individual Flasks)
# contact_name: Bruce H Vaughn
# contact_telephone: (303) 492-7985
# contact_email: Bruce.Vaughn@colorado.edu
# comment: 
# comment:  ************ COLLABORATORS ***************
# comment: 
# comment: NOAA thanks the following collaborators without
# comment: whom these measurements would not be possible.
# comment: 
# collaborator_name: Instituto de Pesquisas Energéticas e Nucleares,
# collaborator_name: Il Centro de Química e Meio Ambiente, Divisao
# collaborator_name: de Quimica Ambiental [IPEN-CQMA]
# comment: 
# comment:  ************ RECIPROCITY AGREEMENT ***************
# comment: 
# comment: Use of these data implies an agreement to reciprocate.
# comment: Laboratories making similar measurements agree to make their
# comment: own data available to the general public and to the scientific
# comment: community in an equally complete and easily accessible form.
# comment: Modelers are encouraged to make available to the community,
# comment: upon request, their own tools used in the interpretation
# comment: of the ESRL data, namely well documented model code, transport
# comment: fields, and additional information necessary for other
# comment: scientists to repeat the work and to run modified versions.
# comment: Model availability includes collaborative support for new
# comment: users of the models.
# comment:
# comment:  ************ DATA DESCRIPTION ***************
# comment:
# description_site-code: nat
# description_project-abbr: ccg_surface
# description_strategy-abbr: flask
# description_analysis-constraints: flag:..%
# description_creation-time: 2015-10-26 13:19:50
# comment:
# comment:  ************ DATA DOCUMENTATION ***************
# comment:
# comment: Please refer to the species-specific README file in the
# comment: appropriate directory folder at ftp://aftp.cmdl.noaa.gov/data/trace_gases/.
# comment:
# data_fields: site year month value
NAT 2010  9   -0.161
NAT 2011  1   -2.026
NAT 2011  2   -2.990
NAT 2011  3   -3.129
NAT 2011  8   -2.075
NAT 2011  9   -0.380
NAT 2012  1    0.055
NAT 2012  2    0.302
NAT 2012  3    1.037
NAT 2012  4    1.012
NAT 2012  5    0.898
NAT 2012  6    0.707
NAT 2012  7   -0.148
NAT 2012  8    0.309
NAT 2012  9    1.317
NAT 2012 10    0.990
NAT 2012 11    0.888
NAT 2012 12    1.439
NAT 2013  1    1.066
NAT 2013  2    0.770
NAT 2013  3    0.939
NAT 2013  4    0.476
NAT 2013  5    0.431
NAT 2013  6    0.691
NAT 2013  7    0.314
NAT 2013  8    0.863
NAT 2013  9    1.779
NAT 2013 10    1.260
NAT 2013 11    0.926
NAT 2013 12    1.369
NAT 2014  1    0.923
NAT 2014  5    0.681
NAT 2014  6    0.685
NAT 2014  7    0.036
NAT 2014  8    0.479
NAT 2014  9    1.583
NAT 2014 10    1.211
NAT 2014 11    1.007
NAT 2014 12    1.359