Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin
Total hydroxyl radical (OH) reactivity, the total loss frequency of the hydroxyl radical in ambient air, provides the total loading of OH reactants in air. We measured the total OH reactivity for the first time during summertime at a coastal receptor site located in the western Mediterranean Bas...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/17/12645/2017/acp-17-12645-2017.pdf |
| _version_ | 1818548303803973632 |
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| author | N. Zannoni N. Zannoni V. Gros R. Sarda Esteve C. Kalogridis C. Kalogridis V. Michoud V. Michoud S. Dusanter S. Sauvage N. Locoge A. Colomb B. Bonsang |
| author_facet | N. Zannoni N. Zannoni V. Gros R. Sarda Esteve C. Kalogridis C. Kalogridis V. Michoud V. Michoud S. Dusanter S. Sauvage N. Locoge A. Colomb B. Bonsang |
| author_sort | N. Zannoni |
| collection | DOAJ |
| description | Total hydroxyl radical (OH) reactivity, the total loss frequency of the
hydroxyl radical in ambient air, provides the total loading of OH reactants
in air. We measured the total OH reactivity for the first time during
summertime at a coastal receptor site located in the western Mediterranean
Basin. Measurements were performed at a temporary field site located in the
northern cape of Corsica (France), during summer 2013 for the project
CARBOSOR (CARBOn within continental pollution plumes: SOurces and Reactivity)–ChArMEx (Chemistry and Aerosols Mediterranean Experiment). Here, we compare the measured total OH reactivity with the OH reactivity calculated from the measured reactive gases. The difference between these two parameters is termed missing OH reactivity, i.e., the fraction of OH reactivity not explained by the measured compounds. The total OH reactivity at the site
varied between the instrumental LoD (limit of detection = 3 s<sup>−1</sup>) to
a maximum of 17 ± 6 s<sup>−1</sup> (35 % uncertainty) and was
5 ± 4 s<sup>−1</sup> (1<i>σ</i> SD – standard deviation) on average. It
varied with air temperature exhibiting a diurnal profile comparable to the
reactivity calculated from the concentration of the biogenic volatile organic
compounds measured at the site. For part of the campaign, 56 % of OH
reactivity was unexplained by the measured OH reactants (missing reactivity).
We suggest that oxidation products of biogenic gas precursors were among the
contributors to missing OH reactivity. |
| first_indexed | 2024-12-12T08:18:10Z |
| format | Article |
| id | doaj.art-684333493d7f44e79a385abc6861317e |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-12T08:18:10Z |
| publishDate | 2017-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-684333493d7f44e79a385abc6861317e2022-12-22T00:31:30ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242017-10-0117126451265810.5194/acp-17-12645-2017Summertime OH reactivity from a receptor coastal site in the Mediterranean BasinN. Zannoni0N. Zannoni1V. Gros2R. Sarda Esteve3C. Kalogridis4C. Kalogridis5V. Michoud6V. Michoud7S. Dusanter8S. Sauvage9N. Locoge10A. Colomb11B. Bonsang12LSCE, Laboratorie Scientifique du Climat et de l'Environnement, CNRS-CEA-UVSQ, IPSL, Université Paris-Saclay, 91191 Gif sur Yvette, Francenow at: Air chemistry department, Max Planck Institute for Chemistry, Mainz, GermanyLSCE, Laboratorie Scientifique du Climat et de l'Environnement, CNRS-CEA-UVSQ, IPSL, Université Paris-Saclay, 91191 Gif sur Yvette, FranceLSCE, Laboratorie Scientifique du Climat et de l'Environnement, CNRS-CEA-UVSQ, IPSL, Université Paris-Saclay, 91191 Gif sur Yvette, FranceLSCE, Laboratorie Scientifique du Climat et de l'Environnement, CNRS-CEA-UVSQ, IPSL, Université Paris-Saclay, 91191 Gif sur Yvette, FranceInstitute of Nuclear Technology and Radiation Protection, National Centre of Scientific Research “Demokritos”, 15310 Ag. Paraskevi, Attiki, GreeceIMT Lille Douai, Univ. Lille, SAGE – Département Sciences de l'Atmosphère et Génie de l'Environnement, 59000 Lille, FranceLaboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), CNRS – UMR7583, Université Paris-Est-Créteil et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, FranceIMT Lille Douai, Univ. Lille, SAGE – Département Sciences de l'Atmosphère et Génie de l'Environnement, 59000 Lille, FranceIMT Lille Douai, Univ. Lille, SAGE – Département Sciences de l'Atmosphère et Génie de l'Environnement, 59000 Lille, FranceIMT Lille Douai, Univ. Lille, SAGE – Département Sciences de l'Atmosphère et Génie de l'Environnement, 59000 Lille, FranceLAMP, Campus universitaire des Cezeaux, 4 Avenue Blaise Pascal, 63178 Aubiere, FranceLSCE, Laboratorie Scientifique du Climat et de l'Environnement, CNRS-CEA-UVSQ, IPSL, Université Paris-Saclay, 91191 Gif sur Yvette, FranceTotal hydroxyl radical (OH) reactivity, the total loss frequency of the hydroxyl radical in ambient air, provides the total loading of OH reactants in air. We measured the total OH reactivity for the first time during summertime at a coastal receptor site located in the western Mediterranean Basin. Measurements were performed at a temporary field site located in the northern cape of Corsica (France), during summer 2013 for the project CARBOSOR (CARBOn within continental pollution plumes: SOurces and Reactivity)–ChArMEx (Chemistry and Aerosols Mediterranean Experiment). Here, we compare the measured total OH reactivity with the OH reactivity calculated from the measured reactive gases. The difference between these two parameters is termed missing OH reactivity, i.e., the fraction of OH reactivity not explained by the measured compounds. The total OH reactivity at the site varied between the instrumental LoD (limit of detection = 3 s<sup>−1</sup>) to a maximum of 17 ± 6 s<sup>−1</sup> (35 % uncertainty) and was 5 ± 4 s<sup>−1</sup> (1<i>σ</i> SD – standard deviation) on average. It varied with air temperature exhibiting a diurnal profile comparable to the reactivity calculated from the concentration of the biogenic volatile organic compounds measured at the site. For part of the campaign, 56 % of OH reactivity was unexplained by the measured OH reactants (missing reactivity). We suggest that oxidation products of biogenic gas precursors were among the contributors to missing OH reactivity.https://www.atmos-chem-phys.net/17/12645/2017/acp-17-12645-2017.pdf |
| spellingShingle | N. Zannoni N. Zannoni V. Gros R. Sarda Esteve C. Kalogridis C. Kalogridis V. Michoud V. Michoud S. Dusanter S. Sauvage N. Locoge A. Colomb B. Bonsang Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin Atmospheric Chemistry and Physics |
| title | Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin |
| title_full | Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin |
| title_fullStr | Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin |
| title_full_unstemmed | Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin |
| title_short | Summertime OH reactivity from a receptor coastal site in the Mediterranean Basin |
| title_sort | summertime oh reactivity from a receptor coastal site in the mediterranean basin |
| url | https://www.atmos-chem-phys.net/17/12645/2017/acp-17-12645-2017.pdf |
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