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Carbon Cycle - OSTI GOV

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Last Updated: 03 October 2022

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Monthly Atmospheric CO2 Mixing Ratios from the NOAA CMDL Carbon Cycle Cooperative Global Air Sampling Network, 1968-2002

Air samples were collected in cylindrical glass flasks tapered at both ends to ground glass stopcocks lubricated with hydrocarbon grease beginning in 1968. Samples from 1980 to 1985 were also collected in spherical 5-L flasks equipped with a single ground glass stopcock at several locations from 1980 to 1985. CH4 measurements were first conducted in the flask samples in 1983. Measurements of 13C/12C and 18O/16O of CO2 in the flask samples were first performed in 1990. The 0. 5-L flasks were replaced in 1991 2. 5-L glass flasks with two Teflon O-ring stopcocks, so the accuracy of the isotopic measurements was improved with larger volume flasks.

Source link: https://www.osti.gov/biblio/1464220


Atmospheric Carbon Dioxide Mixing Ratios from the NOAA CMDL Carbon Cycle Cooperative Global Air Sampling Network (2009)

The Carbon Monitoring and Diagnostic Laboratory at the National Oceanic and Atmospheric Administration's Climate Monitoring and Diagnostic Laboratory has measured CO2 in air samples collected weekly at a global network of sites since the late 1960s. All CMDL flask samples are tested relative to standards traceable to the World Meteorological Organization's CO2 mole fraction scale.

Source link: https://www.osti.gov/biblio/1394442

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions