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Development of a Northern Continental Air Standard Reference Material

The National Institute of Standards and Technology (NIST) recently began to develop standard mixtures of greenhouse gases as part of a broad program mandated by the 2009 United States Congress to support research in climate change. To this end, NIST developed suites of gravimetrically assigned primary standard mixtures (PSMs) comprising carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) in a dry-natural air balance at ambient mole fraction levels. In parallel, the National Oceanic and Atmospheric Administration (NOAA) in Boulder, Colorado, charged 30 aluminum gas cylinders with northern hemisphere air at Niwot Ridge, Colorado. These mixtures, which constitute NIST Standard Reference Material (SRM) 1720 Northern Continental Air, were certified by NIST for ambient mole fractions of CO2, CH4, and N2O relative to NIST PSMs. NOAA-assigned values are also provided as information in support of the World Meteorological Organization (WMO) Global Atmosphere Watch (GAW) Program for CO2, CH4, and N2O, since...

Authors:   George C. Rhoderick; Duane R. Kitzis; Michael E. Kelley; Walter R. Miller; Bradley D. Hall; Edward J. Dlugokencky; Pieter P. Tans; Antonio Possolo; Jennifer Carney
Journal:   Analytical Chemistry
Year:   2016
DOI:   10.1021/acs.analchem.6b00123
Publication date:   01-Mar-2016
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