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| Titel |
An integrated flask sample collection system for greenhouse gas measurements |
| VerfasserIn |
J. Turnbull, D. Guenther, A. Karion, C. Sweeney, E. Anderson, A. Andrews, J. Kofler, N. Miles, T. Newberger, S. Richardson, P. Tans |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 9 ; Nr. 5, no. 9 (2012-09-28), S.2321-2327 |
| Datensatznummer |
250003094
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| Publikation (Nr.) |
 copernicus.org/amt-5-2321-2012.pdf |
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| Zusammenfassung |
| A one hour integrated flask sampling system to collect air in automated
NOAA/ESRL 12-flask packages is described. The integrating compressor system
uses a mass flow controller to regulate the flow of air through a 15 l
volume, thus providing a mixture of air collected over an hour-long period.
By beginning with a high flow rate of 3.8 standard liters per minute and
gradually decreasing the flow rate over time to 0.29 standard liters per
minute it is possible to obtain a nearly uniformly time averaged sample of
air and collect it into a pressurized 0.7 l flask. The weighting
function determining the air mixture obtained is described in detail.
Laboratory and field tests demonstrate that the integrated sample
approximates a simple mean of air collected during the one-hour sampling
time. |
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