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| Titel |
Performance of a low-cost methane sensor for ambient concentration measurements in preliminary studies |
| VerfasserIn |
W. Eugster, G. W. Kling |
| 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. 8 ; Nr. 5, no. 8 (2012-08-13), S.1925-1934 |
| Datensatznummer |
250003047
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| Publikation (Nr.) |
 copernicus.org/amt-5-1925-2012.pdf |
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| Zusammenfassung |
| Methane is the second most important greenhouse gas after CO2 and
contributes to global warming. Its sources are not uniformly
distributed across terrestrial and aquatic ecosystems, and most of the
methane flux is expected to stem from hotspots which often occupy
a very small fraction of the total landscape area. Continuous
time-series measurements of CH4 concentrations can help identify
and locate these methane hotspots. Newer, low-cost trace gas sensors
such as the Figaro TGS 2600 can detect CH4 even at ambient
concentrations. Hence, in this paper we tested this sensor under
real-world conditions over Toolik Lake, Alaska, to determine its
suitability for preliminary studies before placing more expensive and
service-intensive equipment at a given locality. A reasonably good
agreement with parallel measurements made using a Los Gatos Research
FMA 100 methane analyzer was found after removal of the strong
sensitivities for temperature and relative humidity. Correcting
for this sensitivity increased the absolute accuracy required
for in-depth studies, and the reproducibility between two TGS 2600
sensors run in parallel is very good. We conclude that the relative
CH4 concentrations derived from such sensors are sufficient for
preliminary investigations in the search of potential methane
hotspots. |
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