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| Titel |
Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements |
| VerfasserIn |
R. F. Hansen, S. M. Griffith, S. Dusanter, P. S. Rickly, P. S. Stevens, S. B. Bertman, M. A. Carroll, M. H. Erickson, J. H. Flynn, N. Grossberg, B. T. Jobson, B. L. Lefer, H. W. Wallace |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 6 ; Nr. 14, no. 6 (2014-03-21), S.2923-2937 |
| Datensatznummer |
250118519
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| Publikation (Nr.) |
 copernicus.org/acp-14-2923-2014.pdf |
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| Zusammenfassung |
| Total hydroxyl radical (OH) reactivity was measured at the PROPHET (Program
for Research on Oxidants: PHotochemistry, Emissions, and Transport) forested
field site in northern Michigan during the 2009 Community
Atmosphere–Biosphere INteraction EXperiment (CABINEX). OH reactivity
measurements were made with a turbulent-flow reactor instrument at three
heights from the forest floor above (21 and 31 m) and below (6 m) the canopy
at three different time periods during the CABINEX campaign. In addition to
total OH reactivity measurements, collocated measurements of volatile
organic compounds (VOCs), inorganic species, and ambient temperature were
made at the different heights. These ancillary measurements were used to
calculate the total OH reactivity, which was then compared to the measured
values. Discrepancies between the measured and calculated OH reactivity, on
the order of 1–24 s−1, were observed during the daytime above the
canopy at the 21 and 31 m heights, as previously reported for this site. The
measured OH reactivity below the canopy during the daytime was generally
lower than that observed above the canopy. Closer analysis of the
measurements of OH reactivity and trace gases suggests that the missing OH
reactivity could come from oxidation products of VOCs. These results suggest
that additional unmeasured trace gases, likely oxidation products, are
needed to fully account for the OH reactivity measured during CABINEX. |
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