# number_of_header_lines: 61
# 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:  ************ 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: scsn21
# description_project-abbr: ccg_surface
# description_strategy-abbr: flask
# description_analysis-constraints: flag:..%
# description_creation-time: 2015-10-26 13:20:06
# 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
N21 1991  8   -2.360
N21 1991  9   -1.719
N21 1991 10   -0.681
N21 1991 11   -0.195
N21 1991 12    0.134
N21 1992  1    0.274
N21 1992  2    0.214
N21 1992  3    0.155
N21 1992  4   -0.058
N21 1992  5   -0.336
N21 1992  6   -0.728
N21 1992  7   -1.364
N21 1992  8   -1.541
N21 1992  9   -0.858
N21 1992 10   -0.265
N21 1992 11   -0.180
N21 1992 12   -0.015
N21 1993  1    0.143
N21 1993 12    0.081
N21 1994  1    0.214
N21 1994  2    0.163
N21 1994  3    0.162
N21 1995  1   -0.060
N21 1995  2   -0.002
N21 1995  3    0.081
N21 1995  4    0.035
N21 1995 11   -0.348
N21 1995 12   -0.120
N21 1996  1   -0.058
N21 1996  9   -1.252
N21 1996 10   -0.300
N21 1996 11    0.228
N21 1996 12    0.611
N21 1997  5    0.358
N21 1997  6   -0.836
N21 1997  7   -2.823
N21 1997  8   -3.903
N21 1997  9   -2.875
N21 1997 10   -1.221
N21 1997 11   -0.266
N21 1997 12    0.261
N21 1998  1    0.267
N21 1998  2    0.061
N21 1998  3    0.062
N21 1998  4    0.184
N21 1998  5    0.369
N21 1998  6    0.512
N21 1998  7    0.166
N21 1998  8   -0.112
N21 1998  9    0.221
N21 1998 10    0.538