Atmospheric Carbon Dioxide Record from In Situ Measurements at Mt. Cimone (1979-1997)

Colombo, T.; Santaguida, R.

doi:10.3334/CDIAC/ATG.016

Title: Atmospheric Carbon Dioxide Record from In Situ Measurements at Mt. Cimone (1979-1997)

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Abstract

Continuous atmospheric CO2 measurements have been carried out at Mt. Cimone since 1979. Since December 1988, air samples have also been collected approximately once per week in a pair of 2-L, electropolished, stainless steel cylindrical flasks. From 1979 until December 1988, a Hartmann and Braun URAS-2T NDIR gas analyzer was used for CO2 determinations. Currently, CO2 determinations are made through the use of a Siemens Ultramat-5E NDIR gas analyzer. Water vapor is eliminated by passing the air through a U-tube placed in an alcohol bath at -600°C. Calibration of the Ultramat-5E is accomplished by using two CO2-in-air working standard gases. These working standard gas concentrations are checked 10 days apart against three CO2-in-air mixtures that serve as secondary standards. The secondary standards are checked every 6 months against five other CO2-in-air primary standards. Hourly CO2 values are routinely plotted together with wind data. Anomalous concentrations and those affected by instrument failures or local sources are rejected. Atmospheric CO2 concentrations from Mt. Cimone are reported in the 1993 WMO/Scripps mole fraction scale. For further details on the measurement apparatus and sampling techniques used at Mt. Cimone, see Cundari et al. (1990).For access to the data files, click this link to themore »« less

Authors:

Colombo, T.; Santaguida, R.

Italian Meteorological Service

Publication Date:: Tue Jan 20 00:00:00 EST 1998

Other Number(s):: osti:1394196; doi:10.3334/CDIAC/ATG.016; cdiac:doi 10.3334/CDIAC/atg.016

Research Org.:: Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States)

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

Subject:: 54 ENVIRONMENTAL SCIENCES

Keywords:: Atmospheric CO2 Concentrations; Atmospheric CO2 Mixing Ratios; Infrared Gas Analyzer; in situ; Colombo; TRENDS-CO2; Annual Atmospheric CO2; Monthly CO2; year

Geolocation:: 44.183,10.7|44.183,10.7|44.183,10.7|44.183,10.7|44.183,10.7

OSTI Identifier:: 1394196

DOI:: https://doi.org/10.3334/CDIAC/ATG.016

Project Location:

Citation Formats


                    Colombo, T., and Santaguida, R. Atmospheric Carbon Dioxide Record from In Situ Measurements at Mt. Cimone (1979-1997).  United States: N. p., 1998. 
        Web.  doi:10.3334/CDIAC/ATG.016.

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                    Colombo, T., & Santaguida, R. Atmospheric Carbon Dioxide Record from In Situ Measurements at Mt. Cimone (1979-1997).  United States.  doi:https://doi.org/10.3334/CDIAC/ATG.016

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                    Colombo, T., and Santaguida, R. 1998.  
"Atmospheric Carbon Dioxide Record from In Situ Measurements at Mt. Cimone (1979-1997)".  United States.  doi:https://doi.org/10.3334/CDIAC/ATG.016.  https://www.osti.gov/servlets/purl/1394196. Pub date:Tue Jan 20 00:00:00 EST 1998

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@article{osti_1394196,

  title        = {Atmospheric Carbon Dioxide Record from In Situ Measurements at Mt. Cimone (1979-1997)},

  author       = {Colombo, T. and Santaguida, R.},

  abstractNote = {Continuous atmospheric CO2 measurements have been carried out at Mt. Cimone since 1979. Since December 1988, air samples have also been collected approximately once per week in a pair of 2-L, electropolished, stainless steel cylindrical flasks. From 1979 until December 1988, a Hartmann and Braun URAS-2T NDIR gas analyzer was used for CO2 determinations. Currently, CO2 determinations are made through the use of a Siemens Ultramat-5E NDIR gas analyzer. Water vapor is eliminated by passing the air through a U-tube placed in an alcohol bath at -600°C. Calibration of the Ultramat-5E is accomplished by using two CO2-in-air working standard gases. These working standard gas concentrations are checked 10 days apart against three CO2-in-air mixtures that serve as secondary standards. The secondary standards are checked every 6 months against five other CO2-in-air primary standards. Hourly CO2 values are routinely plotted together with wind data. Anomalous concentrations and those affected by instrument failures or local sources are rejected. Atmospheric CO2 concentrations from Mt. Cimone are reported in the 1993 WMO/Scripps mole fraction scale. For further details on the measurement apparatus and sampling techniques used at Mt. Cimone, see Cundari et al. (1990).For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/trends/co2/mtcim.html},

  doi          = {10.3334/CDIAC/ATG.016},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jan 20 00:00:00 EST 1998},

  month        = {Tue Jan 20 00:00:00 EST 1998}

}

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DOI: https://doi.org/10.3334/CDIAC/ATG.016

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