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| Titel |
Measurement of Ozone Production Sensor |
| VerfasserIn |
M. Cazorla, W. H. Brune |
| 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. 3 ; Nr. 3, no. 3 (2010-05-03), S.545-555 |
| Datensatznummer |
250001104
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| Publikation (Nr.) |
 copernicus.org/amt-3-545-2010.pdf |
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| Zusammenfassung |
| A new ambient air monitor, the Measurement of Ozone Production Sensor
(MOPS), measures directly the rate of ozone production in the atmosphere.
The sensor consists of two 11.3 L environmental chambers made of
UV-transmitting Teflon film, a unit to convert NO2 to O3, and a
modified ozone monitor. In the sample chamber, flowing ambient air is
exposed to the sunlight so that ozone is produced just as it is in the
atmosphere. In the second chamber, called the reference chamber, a
UV-blocking film over the Teflon film prevents ozone formation but allows
other processes to occur as they do in the sample chamber. The air flows
that exit the two chambers are sampled by an ozone monitor operating in
differential mode so that the difference between the two ozone signals,
divided by the exposure time in the chambers, gives the ozone production
rate. High-efficiency conversion of NO2 to O3 prior to detection
in the ozone monitor accounts for differences in the NOx
photostationary state that can occur in the two chambers. The MOPS measures
the ozone production rate, but with the addition of NO to the sampled air
flow, the MOPS can be used to study the sensitivity of ozone production to
NO. Preliminary studies with the MOPS on the campus of the Pennsylvania
State University show the potential of this new technique. |
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