# number_of_header_lines: 69
# 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: ensure 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: CH4C13 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: National Institute of Water and Atmospheric
# collaborator_name: Research [NIWA]
# 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: bhd
# description_project-abbr: ccg_surface
# description_strategy-abbr: flask
# description_analysis-constraints: flag:..%
# description_creation-time: 2018-09-24 14:38:27
# 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
BHD 2009  3  -46.991
BHD 2009  4  -47.032
BHD 2009  5  -47.071
BHD 2009  6  -47.079
BHD 2009  7  -47.085
BHD 2009  8  -47.115
BHD 2009  9  -47.155
BHD 2009 10  -47.164
BHD 2010  4  -46.996
BHD 2010  5  -47.098
BHD 2010  6  -47.187
BHD 2010  7  -47.227
BHD 2010  8  -47.216
BHD 2010  9  -47.160
BHD 2010 10  -47.091
BHD 2010 11  -47.033
BHD 2010 12  -46.999
BHD 2011  1  -46.982
BHD 2011  2  -46.999
BHD 2011  3  -47.053
BHD 2011  4  -47.126
BHD 2011  5  -47.192
BHD 2011  6  -47.219
BHD 2011  7  -47.220
BHD 2011  8  -47.221
BHD 2011  9  -47.217
BHD 2011 10  -47.181
BHD 2011 11  -47.104
BHD 2011 12  -47.024
BHD 2012  1  -46.969
BHD 2012  2  -46.981
BHD 2012  3  -47.040
BHD 2012  4  -47.111
BHD 2012  5  -47.146
BHD 2012  6  -47.145
BHD 2012  7  -47.139
BHD 2012  8  -47.143
BHD 2012  9  -47.145
BHD 2013  1  -47.006
BHD 2013  5  -47.173
BHD 2013  6  -47.172
BHD 2013  7  -47.172
BHD 2013  8  -47.188
BHD 2013  9  -47.206
BHD 2013 10  -47.192
BHD 2013 11  -47.134
BHD 2013 12  -47.051
BHD 2014  1  -47.012
BHD 2014  2  -47.050
BHD 2014  3  -47.135
BHD 2014  4  -47.195
BHD 2014  5  -47.204
BHD 2014  6  -47.199
BHD 2014  7  -47.208
BHD 2014  8  -47.219
BHD 2014  9  -47.208
BHD 2014 10  -47.189
BHD 2014 11  -47.173
BHD 2014 12  -47.161
BHD 2015  1  -47.146
BHD 2015  2  -47.141
BHD 2015  3  -47.168
BHD 2015  7  -47.220
BHD 2015  8  -47.177
BHD 2015  9  -47.157
BHD 2015 10  -47.158
BHD 2015 11  -47.161
BHD 2015 12  -47.152
BHD 2016  1  -47.129
BHD 2016  2  -47.106
BHD 2016  3  -47.100
BHD 2016  4  -47.110
BHD 2016  5  -47.131
BHD 2016  6  -47.154
BHD 2016  7  -47.175
BHD 2016  8  -47.192
BHD 2016  9  -47.195
BHD 2017  1  -47.120
BHD 2017  2  -47.143
BHD 2017  3  -47.179
BHD 2017  4  -47.218
BHD 2017  5  -47.241
BHD 2017  6  -47.248
BHD 2017  7  -47.255
BHD 2017  8  -47.267
BHD 2017  9  -47.271
BHD 2017 10  -47.250
BHD 2017 11  -47.214