# number_of_header_lines: 55
# comment:  
# comment:  ************ USE OF GML DATA ****************
# comment:  
# comment: These data are made freely available to the public and the scientific
# comment: community in the belief that their wide dissemination will lead to
# comment: greater understanding and new scientific insights. To ensure that GML
# comment: receives fair credit for their work please include relevant citation
# comment: text in publications. We encourage users to contact the data providers,
# comment: who can provide detailed information about the measurements and
# comment: scientific insight.  In cases where the data are central to a
# comment: publication, coauthorship for data providers may be appropriate.
# comment: 
# comment: 
# comment: Please see accompanying README file, if available, for citation text.
# 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: Sylvia Englund Michel
# contact_telephone: (303) 492-5495
# contact_email: Sylvia.Englund@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 Science Foundation Office of Polar
# collaborator_name: Programs [NSF]
# collaborator_url: http://www.nsf.gov/dir/index.jsp?org=OPP
# comment: 
# comment:  ************ RECIPROCITY AGREEMENT ***************
# comment: 
# comment:
# comment:  ************ DATA DESCRIPTION ***************
# comment:
# description_site-code: sum
# description_project-abbr: ccg_surface
# description_strategy-abbr: flask
# description_analysis-constraints: flag:..%
# description_creation-time: 2023-09-21 15:03:51
# comment:
# comment:  ************ DATA DOCUMENTATION ***************
# comment:
# comment: Please refer to the species-specific README file in the
# comment: appropriate directory folder at https://gml.noaa.gov/aftp/data/trace_gases/.
# comment:
# data_fields: site year month value
SUM 2010  4  -47.249
SUM 2010  5  -47.233
SUM 2010  6  -47.250
SUM 2010  7  -47.327
SUM 2010  8  -47.428
SUM 2010  9  -47.501
SUM 2010 10  -47.516
SUM 2010 11  -47.484
SUM 2010 12  -47.431
SUM 2011  1  -47.395
SUM 2011  2  -47.383
SUM 2011  3  -47.390
SUM 2011  4  -47.387
SUM 2011  5  -47.359
SUM 2011  6  -47.348
SUM 2011  7  -47.409
SUM 2011  8  -47.560
SUM 2011  9  -47.704
SUM 2011 10  -47.737
SUM 2011 11  -47.657
SUM 2011 12  -47.547
SUM 2012  1  -47.486
SUM 2012  2  -47.460
SUM 2012  3  -47.420
SUM 2012  4  -47.347
SUM 2012  5  -47.267
SUM 2012  6  -47.248
SUM 2012  7  -47.331
SUM 2012  8  -47.481
SUM 2012  9  -47.611
SUM 2012 10  -47.675
SUM 2012 11  -47.639
SUM 2012 12  -47.562
SUM 2013  5  -47.377
SUM 2013  6  -47.377
SUM 2013  7  -47.433
SUM 2013  8  -47.526
SUM 2013  9  -47.593
SUM 2013 10  -47.606
SUM 2013 11  -47.562
SUM 2013 12  -47.517
SUM 2014  1  -47.514
SUM 2014  2  -47.535
SUM 2014  3  -47.527
SUM 2014  4  -47.448
SUM 2014  5  -47.336
SUM 2014  6  -47.289
SUM 2014  7  -47.350
SUM 2014  8  -47.486
SUM 2014  9  -47.593
SUM 2014 10  -47.607
SUM 2014 11  -47.549
SUM 2014 12  -47.466
SUM 2015  1  -47.413
SUM 2015  2  -47.406
SUM 2015  3  -47.417
SUM 2015  4  -47.411
SUM 2015  5  -47.391
SUM 2015  6  -47.401
SUM 2015  7  -47.483
SUM 2015  8  -47.600
SUM 2015  9  -47.701
SUM 2015 10  -47.725
SUM 2015 11  -47.694
SUM 2015 12  -47.647
SUM 2016  1  -47.610
SUM 2016  2  -47.571
SUM 2016  3  -47.508
SUM 2016  4  -47.438
SUM 2016  5  -47.405
SUM 2016  6  -47.442
SUM 2016  7  -47.539
SUM 2016  8  -47.675
SUM 2016  9  -47.772
SUM 2016 10  -47.789
SUM 2016 11  -47.741
SUM 2016 12  -47.672
SUM 2017  1  -47.623
SUM 2017  2  -47.594
SUM 2017  3  -47.559
SUM 2017  4  -47.501
SUM 2017  5  -47.442
SUM 2017  6  -47.446
SUM 2017  7  -47.534
SUM 2017  8  -47.683
SUM 2017  9  -47.798
SUM 2017 10  -47.815
SUM 2017 11  -47.762
SUM 2017 12  -47.701
SUM 2018  1  -47.656
SUM 2018  2  -47.635
SUM 2018  3  -47.612
SUM 2018  4  -47.562
SUM 2018  5  -47.475
SUM 2018  6  -47.399
SUM 2018  7  -47.401
SUM 2018  8  -47.485
SUM 2018  9  -47.577
SUM 2018 10  -47.621
SUM 2018 11  -47.597
SUM 2018 12  -47.563
SUM 2019  1  -47.545
SUM 2019  5  -47.491
SUM 2019  6  -47.559
SUM 2019  7  -47.622
SUM 2019  8  -47.641
SUM 2019  9  -47.630
SUM 2019 10  -47.601
SUM 2019 11  -47.553
SUM 2019 12  -47.496
SUM 2020  1  -47.456
SUM 2020  2  -47.447
SUM 2020  3  -47.458
SUM 2020  4  -47.487
SUM 2020  5  -47.541
SUM 2020  6  -47.645
SUM 2020  7  -47.779
SUM 2020  8  -47.899
SUM 2020  9  -47.994
SUM 2020 10  -48.021
SUM 2020 11  -47.984
SUM 2020 12  -47.903
SUM 2021  1  -47.823
SUM 2021  2  -47.768
SUM 2021  3  -47.722
SUM 2021  4  -47.684
SUM 2021  5  -47.667
SUM 2021  6  -47.693
SUM 2021  7  -47.775
SUM 2021  8  -47.887
SUM 2021  9  -47.972
SUM 2021 10  -47.990
SUM 2021 11  -47.953
SUM 2021 12  -47.900
SUM 2022  1  -47.864
SUM 2022  2  -47.836
SUM 2022  3  -47.800
SUM 2022  4  -47.760
SUM 2022  5  -47.747
SUM 2022  6  -47.785
SUM 2022  7  -47.866
SUM 2022  8  -47.975
SUM 2022  9  -48.055
SUM 2022 10  -48.070
SUM 2022 11  -48.033
SUM 2022 12  -47.984