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Cape Grim
-CO-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
The Cape Grim Baseline Air Pollution Station (CGBAPS) was established by the Australian Government to monitor and study global atmospheric composition.
For details, please visit the following website:
http://agage.eas.gatech.edu/Stations/capegrim.htm |
| Description for sampling analysis |
: |
For details, please visit the following website:
http://agage.eas.gatech.edu/index.htm |
| Instrument and Analysis |
| Measurement method |
: |
[md]GC-MD |
| Current status and history of instrument |
: |
[md]GC-MD |
| Description of instrument |
: |
For details, please visit the following website:
http://agage.eas.gatech.edu/instruments-overview.htm
http://agage.eas.gatech.edu/instruments-gcmd.htm |
| Calibration |
| Current scale employed in the measurement |
: |
CSIRO94 |
| Measurement calibration |
: |
The calibration scale for atmospheric CO measurements made by AGAGE derives from the gravimetric scale developed at NOAA/CMDL by Novelli et al. (J.Geophys. Res., Vol. 96, July 20, 1991, pp. 13,109-13,121). The link to the gravimetric scale is via a single standard in a high-pressure (2000 psig) aluminum cylinder (29.5 liter), with a CO mixing ratio (mole fraction in dry air) assigned by NOAA/CMDL of 195.7 parts per billion (109). This standard is one of five synthetic mixtures of CO2, CH4, and CO in zero air (with CO mixing ratios spanning the range 30.1 – 195.7 ppb) that were calibrated for CSIRO Atmospheric Research by NOAA/CMDL between 1992 and 1994. (The synthetic mixtures were prepared by Scott-Marrin, Inc., Riverside, California). |
| Scale and calibration(treasability) |
: |
[md]CSIRO94 |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
|
| Processing for averaging |
: |
Processing for Monthly Data:
"_pol" files in monthly data are calculated by using all (both polluted and un-polluted) data in event data. |
| Data flag |
: |
ALE/GAGE/AGAGE measurements which are suspected to be influenced by local or regional pollution events are marked with a 'P'. |
| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
For details, please visit the following website:
http://agage.eas.gatech.edu/mission.htm |
| Reference |
: |
Prinn R., Simmonds P., Rasmussen R., Rosen R., Alyea F., Cardelino C., Crawford A., Cunnold D., Fraser P., and Lovelock J., 1983: The Atmospheric Lifetime Experiment, I: Introduction, instrumentation and overview. J. Geophys. Res., 88, 8353-8368.
Steele L. P., Langenfelds R. L., Lucarelli M. P., Fraser P. J., Cooper L. N., Spencer D. A., Chea S. and Broadhurst K., 1996: Atmospheric methane, carbon dioxide, carbon monoxide, hydrogen and nitrous oxide from Cape Grim flask air samples analysed by gas chromatography. Baseline Atmospheric Program Australia 1994-95, 107-110.
Prinn, R.G., R.F. Weiss, P.J. Fraser, P.G. Simmonds, D.M. Cunnold, F.N. Alyea, S. O'Doherty, P. Salameh, B.R. Miller, J. Huang, R.H.J. Wang, D.E. Hartley, C. Harth, L.P. Steele, G. Sturrock, P.M. Midgely, and A. McCulloch. 2000.
A history of chemically and radiatively important gases in air deduced from ALE/GAGE/AGAGE. Journal of Geophysical Research 115: 17751-92. |
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| submitted by Advanced Global Atmospheric Gases Experiment Science Team(AGAGE) |
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