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| Titel |
μDirac: an autonomous instrument for halocarbon measurements |
| VerfasserIn |
B. Gostlow, A. D. Robinson, N. R. P. Harris, L. M. O'Brien, D. E. Oram, G. P. Mills, H. M. Newton, S. E. Yong, J. A. Pyle |
| 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 ; 3, no. 2 ; Nr. 3, no. 2 (2010-04-29), S.507-521 |
| Datensatznummer |
250000979
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| Publikation (Nr.) |
 copernicus.org/amt-3-507-2010.pdf |
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| Zusammenfassung |
| We describe a new instrument (μDirac) capable of measuring halocarbons in the
atmosphere. Portability, power efficiency and autonomy were critical design
requirements and the resulting instrument can be readily deployed unattended
on a range of platforms: long duration balloon, aircraft, ship and
ground-based stations. The instrument is a temperature programmed gas
chromatograph with electron capture detector (GC-ECD). The design
requirements led to μDirac being built in-house with several novel features.
It currently measures a range of halocarbons (including short-lived tracers
having biogenic and anthropogenic sources) with measurement precision
relative standard deviations ranging from ± 1% (CCl4) to ± 9%
(CH3I). The prototype instrument was first tested in 2005 and
the instrument has been proved in the field on technically challenging
aircraft and ground-based campaigns. Results from an aircraft and a
ground-based deployment are described. |
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