24 Mar 2020
24 Mar 2020
Contributions to OH reactivity from unexplored volatile organic compounds measured by PTR-ToF-MS – A case study in a suburban forest of the Seoul Metropolitan Area during KORUS-AQ 2016
- 1Department of Earth System Science, University of California, Irvine, Irvine CA 92697, USA
- 2School of Marine and Atmospheric Sciences, Stony Brooke University, Stony Brook, NY 1111794, USA
- 3National Institute of Environmental Research, Inchoen 22689, South Korea
- 4Department of Chemistry, University of California, Irvine, Irvine CA 92697, USA
- 5Aerodyne Research Inc., Billerica MA 01821, USA
- 6NASA Goddard Space Flight Center, Chemistry and Dynamics Laboratory, Greenbelt, MD 20771, USA
- anow at: Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark
- bnow at: Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management , University of Copenhagen, Copenhagen, Denmark
- 1Department of Earth System Science, University of California, Irvine, Irvine CA 92697, USA
- 2School of Marine and Atmospheric Sciences, Stony Brooke University, Stony Brook, NY 1111794, USA
- 3National Institute of Environmental Research, Inchoen 22689, South Korea
- 4Department of Chemistry, University of California, Irvine, Irvine CA 92697, USA
- 5Aerodyne Research Inc., Billerica MA 01821, USA
- 6NASA Goddard Space Flight Center, Chemistry and Dynamics Laboratory, Greenbelt, MD 20771, USA
- anow at: Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark
- bnow at: Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management , University of Copenhagen, Copenhagen, Denmark
Abstract. We report OH reactivity observations by a chemical ionization mass spectrometer – comparative reactivity method (CIMS-CRM) instrument in a suburban forest of the Seoul Metropolitan Area (SMA) during Korea US Air Quality Study (KORUS-AQ 2016) from mid-May to mid-June of 2016. A comprehensive observational suite was deployed to quantify reactive trace gases inside of the forest canopy including a high-resolution proton transfer reaction time of flight mass spectrometer (PTR-ToF-MS). An average OH reactivity of 30.7 ± 5.1 s−1 was observed, while the OH reactivity calculated from CO, NO + NO2 (NOx), ozone (O3), sulfur dioxide (SO2), and 14 volatile organic compounds (VOCs) was 11.8 ± 1.0 s−1. An analysis of 346 peaks from the PTR-ToF-MS accounted for an additional 6.0 ± 2.2 s−1 of the total measured OH reactivity, leaving 42.0 % missing OH reactivity. The missing OH reactivity most likely comes from VOC oxidation products of both biogenic and anthropogenic origin.
- Preprint
(3325 KB) -
Supplement
(3108 KB) - BibTeX
- EndNote
Dianne Sanchez et al.


-
RC1: 'Review of the manuscript titled "Contributions to OH reactivity from unexplored volatile organic compounds measured by PTR-ToF-MS -- A case study in a suburban forest of the Seoul Metropolitan Area during KORUS-AQ 2016", by Sanchez et al.', Arnaud P. Praplan, 26 Mar 2020
-
RC2: 'Reviewer's Comments', Anonymous Referee #2, 19 Apr 2020
-
RC3: 'Review of Sanchez et al., Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2020-174', Anonymous Referee #3, 01 May 2020
-
AC1: 'Responses', Saewung Kim, 27 Jul 2020


-
RC1: 'Review of the manuscript titled "Contributions to OH reactivity from unexplored volatile organic compounds measured by PTR-ToF-MS -- A case study in a suburban forest of the Seoul Metropolitan Area during KORUS-AQ 2016", by Sanchez et al.', Arnaud P. Praplan, 26 Mar 2020
-
RC2: 'Reviewer's Comments', Anonymous Referee #2, 19 Apr 2020
-
RC3: 'Review of Sanchez et al., Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2020-174', Anonymous Referee #3, 01 May 2020
-
AC1: 'Responses', Saewung Kim, 27 Jul 2020
Dianne Sanchez et al.
Dianne Sanchez et al.
Viewed
HTML | XML | Total | Supplement | BibTeX | EndNote | |
---|---|---|---|---|---|---|
550 | 237 | 8 | 795 | 67 | 14 | 23 |
- HTML: 550
- PDF: 237
- XML: 8
- Total: 795
- Supplement: 67
- BibTeX: 14
- EndNote: 23
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1
Cited
2 citations as recorded by crossref.
- The role of a suburban forest in controlling vertical trace gas and OH reactivity distributions – a case study for the Seoul metropolitan area S. Kim et al. 10.1039/D0FD00081G
- Measurement report: Important contributions of oxygenated compounds to emissions and chemistry of volatile organic compounds in urban air C. Wu et al. 10.5194/acp-20-14769-2020