Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993)

Manning, M. R.; Gomez, A. J.; Pohl, K. P.

doi:10.3334/CDIAC/ATG.017

Title: Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993)

Dataset
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Abstract

Determinations of atmospheric CO2 mixing ratios are made using a Siemens Ultramat-3 nondispersive infrared (NDIR) gas analyzer. The NDIR CO2 analyzer is connected via a gas manifold consisting of stainless steel tubing and computer-controlled solenoid switches to 12 gas cylinders and 2 sample air lines. The NDIR analyzer compares ambient air CO2 mixing ratios relative to known CO2 mixing ratios in tanks of compressed reference gases. The analyzer operates in a differential mode, with a "zero" reference gas of CO2 mixing ratio 20 to 30 parts per million (ppm) below ambient air CO2 levels flowing continuously through one cell of the analyzer at ~10 mL/min. When atmospheric CO2 is measured, a diaphragm pump pulls air through a sampling line at ~5 L/min. A small fraction of this (180 mL/min) is dried cryogenically to a temperature of approximately ¬70° Celsius and passed through the sample cell of the CO2 analyzer. Both the "zero" and sample gas are exhausted into the observatory building.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/trends/co2/baring.html

Authors:

Manning, M. R.; Gomez, A. J.; Pohl, K. P.

National Institute of Water and Atmospheric Research, Ltd., Climate Division; OSTI
National Institute of Water and Atmospheric Research, Ltd., Climate Division

Publication Date:: Tue Oct 21 04:00:00 UTC 1997

Other Number(s):: osti:1394197; doi:10.3334/CDIAC/ATG.017; cdiac:doi 10.3334/CDIAC/atg.017

Research Org.:: Environmental System Science Data Infrastructure for a Virtual Ecosystem

Sponsoring Org.:: U.S. DOE > Office of Science (SC) > Biological and Environmental Research (BER) (SC-23)

Subject:: 54 ENVIRONMENTAL SCIENCES; Apr; Atmospheric CO2 Mixing Ratio; Aug; Dec; Feb; Infrared Gas Analyzer; Jan; Jul; Jun; Manning; Mar; May; Nov; Oct; Sep; TRENDS-CO2; annual; atmospheric CO2 concentrations; in situ; year

OSTI Identifier:: 1394197

DOI:: https://doi.org/10.3334/CDIAC/ATG.017

Citation Formats


                    Manning, M. R., Gomez, A. J., and Pohl, K. P. Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993).  United States: N. p., 1997. 
        Web.  doi:10.3334/CDIAC/ATG.017.

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                    Manning, M. R., Gomez, A. J., & Pohl, K. P. Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993).  United States.  doi:https://doi.org/10.3334/CDIAC/ATG.017

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                    Manning, M. R., Gomez, A. J., and Pohl, K. P. 1997.  
"Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993)".  United States.  doi:https://doi.org/10.3334/CDIAC/ATG.017.  https://www.osti.gov/servlets/purl/1394197. Pub date:Tue Oct 21 04:00:00 UTC 1997

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@article{osti_1394197,

  title        = {Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993)},

  author       = {Manning, M. R. and Gomez, A. J. and Pohl, K. P.},

  abstractNote = {Determinations of atmospheric CO2 mixing ratios are made using a Siemens Ultramat-3 nondispersive infrared (NDIR) gas analyzer. The NDIR CO2 analyzer is connected via a gas manifold consisting of stainless steel tubing and computer-controlled solenoid switches to 12 gas cylinders and 2 sample air lines. The NDIR analyzer compares ambient air CO2 mixing ratios relative to known CO2 mixing ratios in tanks of compressed reference gases. The analyzer operates in a differential mode, with a "zero" reference gas of CO2 mixing ratio 20 to 30 parts per million (ppm) below ambient air CO2 levels flowing continuously through one cell of the analyzer at ~10 mL/min. When atmospheric CO2 is measured, a diaphragm pump pulls air through a sampling line at ~5 L/min. A small fraction of this (180 mL/min) is dried cryogenically to a temperature of approximately ¬70° Celsius and passed through the sample cell of the CO2 analyzer. Both the "zero" and sample gas are exhausted into the observatory building.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/trends/co2/baring.html},

  doi          = {10.3334/CDIAC/ATG.017},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Oct 21 04:00:00 UTC 1997},

  month        = {Tue Oct 21 04:00:00 UTC 1997}

}

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DOI: https://doi.org/10.3334/CDIAC/ATG.017

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