Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements
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 ma...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/14/2923/2014/acp-14-2923-2014.pdf |
| _version_ | 1818927746994143232 |
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| author | 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 |
| author_facet | 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 |
| author_sort | R. F. Hansen |
| collection | DOAJ |
| description | 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<sup>−1</sup>, 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. |
| first_indexed | 2024-12-20T03:17:55Z |
| format | Article |
| id | doaj.art-a165fd4448bc450d83c82d62fe15d7a7 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-20T03:17:55Z |
| publishDate | 2014-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-a165fd4448bc450d83c82d62fe15d7a72022-12-21T19:55:18ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242014-03-011462923293710.5194/acp-14-2923-2014Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurementsR. F. Hansen0S. M. Griffith1S. Dusanter2P. S. Rickly3P. S. Stevens4S. B. Bertman5M. A. Carroll6M. H. Erickson7J. H. Flynn8N. Grossberg9B. T. Jobson10B. L. Lefer11H. W. Wallace12Department of Chemistry, Indiana University, Bloomington, IN, USACenter for Research in Environmental Science, Indiana University, Bloomington, IN, USASchool of Public and Environmental Affairs, Indiana University, Bloomington, IN, USACenter for Research in Environmental Science, Indiana University, Bloomington, IN, USADepartment of Chemistry, Indiana University, Bloomington, IN, USADepartment of Chemistry, Western Michigan University, Kalamazoo, MI, USADepartment of Chemistry, University of Michigan, Ann Arbor, MI, USADepartment of Civil and Environmental Engineering, Washington State University, Pullman, WA, USADepartment of Earth and Atmospheric Sciences, University of Houston, Houston, TX, USADepartment of Earth and Atmospheric Sciences, University of Houston, Houston, TX, USADepartment of Civil and Environmental Engineering, Washington State University, Pullman, WA, USADepartment of Earth and Atmospheric Sciences, University of Houston, Houston, TX, USADepartment of Civil and Environmental Engineering, Washington State University, Pullman, WA, USATotal 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<sup>−1</sup>, 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.http://www.atmos-chem-phys.net/14/2923/2014/acp-14-2923-2014.pdf |
| spellingShingle | 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 Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements Atmospheric Chemistry and Physics |
| title | Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements |
| title_full | Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements |
| title_fullStr | Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements |
| title_full_unstemmed | Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements |
| title_short | Measurements of total hydroxyl radical reactivity during CABINEX 2009 – Part 1: field measurements |
| title_sort | measurements of total hydroxyl radical reactivity during cabinex 2009 ndash part 1 field measurements |
| url | http://www.atmos-chem-phys.net/14/2923/2014/acp-14-2923-2014.pdf |
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