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

doi:10.3334/CDIAC/ATG.017

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

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.

Authors:

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

National Institute of Water and Atmospheric Research, Ltd., Lower Hutt, New Zealand
National Institute of Water and Atmospheric Research, Ltd. Lower Hutt, New Zealand

Publication Date:: 1994-01-01

Product Type:: Dataset

Research Org.:: Environmental System Science Data Infrastructure for a Virtual Ecosystem; Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Subject:: 54 ENVIRONMENTAL SCIENCES

OSTI Identifier:: 1394197

DOI:: 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., 1994. 
        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:10.3334/CDIAC/ATG.017.

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                    Manning, M. R., Gomez, A. J., and Pohl, K. P. 1994.  
"Atmospheric Carbon Dioxide Record from In Situ Measurements at Baring Head (1970 - 1993)".  United States.  doi:10.3334/CDIAC/ATG.017.  https://www.osti.gov/servlets/purl/1394197. Pub date:Sat Jan 01 00:00:00 EST 1994

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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.},

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

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {1994},

  month        = {1}

}

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DOI: 10.3334/CDIAC/ATG.017

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Environmental Systems Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE)

Agarwal, Deb

The U.S. Department of Energy’s (DOE) Environmental Systems Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) is a data archive for Earth and environmental science data. The mission of ESS-DIVE is to preserve, expand access to, and improve usability of critical data generated through DOE-sponsored research of terrestrial and subsurface ecosystems. By making ESS research data easily accessible, ESS-DIVE has the potential to advance the scientific understanding and prediction of hydro-biogeochemical and ecosystem processes that occur from bedrock through soil and vegetation to the atmospheric interface.

Works referencing / citing this record:

Bomb 14C enrichment indicates decadal C pool in deep soil?
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Baisden, W. Troy; Parfitt, Roger L.
Biogeochemistry, Vol. 85, Issue 1
DOI: 10.1007/s10533-007-9101-7

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Similar Records

Research Org:	Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:	USDOE Office of Science (SC), Biological and Environmental Research (BER)

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

Abstract

Citation Formats

Bomb 14C enrichment indicates decadal C pool in deep soil? journal, June 2007

Bomb 14C enrichment indicates decadal C pool in deep soil?
journal, June 2007