NOAA/GMCC (National Oceanic and Atmospheric Administration/Geophysical Monitoring for Climatic Change) calibrations of CO/sub 2/-in-air reference gases: 1979-1985. Technical memo
Technical Report
·
OSTI ID:6504559
The results of 423 CO/sub 2/-in-air reference gas calibrations from 1979 to 1985 are presented. Time dependent concentrations for the NOAA secondary and tertiary standards are plotted and tabulated. A preliminary analysis of the uncertainty of the assigned CO/sub 2/ concentrations for the reference gases used in the field for atmospheric measurements gives a value of 0.07 ppm relative to the WMO scale maintained by SIO. A comparison of 23 tanks with both SIO and NOAA calibrations shows no significant difference between them, the mean difference being 0.03 + or - 0.03 ppm. Calibrations by NOAA of 3 NBS SRM CO/sub 2/-in-air tanks show an average offset of 0.25 ppm from the NBS certified values.
- Research Organization:
- National Oceanic and Atmospheric Administration, Silver Spring, MD (USA). Air Resources Lab.
- OSTI ID:
- 6504559
- Report Number(s):
- PB-87-164992/XAB; NOAA-TM-ERL-ARL-150
- Country of Publication:
- United States
- Language:
- English
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