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Observations of atmospheric oxidation and ozone production in South Korea

Brune, William H. and Miller, David O. and Thames, Alexander B. and Brosius, Alexandra L. and Barletta, Barbara and Blake, Donald R. and Blake, Nicola J. and Chen, Gao and Choi, Yonghoon and Crawford, James H. and DiGangi, Joshua P. and Diskin, Glenn and Fried, Alan and Hall, Samuel R. and Hanisco, Thomas F. and Huey, Greg L. and Hughes, Stacey C. and Kim, Michelle and Meinardi, Simone and Montzka, Denise D. and Pusede, Sally E. and Schroeder, Jason R. and Teng, Alex and Tanner, David J. and Ullmann, Kirk and Walega, James and Weinheimer, Andrew and Wisthaler, Armin and Wennberg, Paul O. (2022) Observations of atmospheric oxidation and ozone production in South Korea. Atmospheric Environment, 269 . Art. No. 118854. ISSN 1352-2310. doi:10.1016/j.atmosenv.2021.118854.

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South Korea routinely experiences poor air quality with ozone and small particles exceeding air quality standards. To build a better understanding of this problem, in 2016, the KORea-United States cooperative Air Quality (KORUS-AQ) study collected surface and airborne measurements of many chemical species, including the reactive gases hydroxyl (OH) and hydroperpoxyl (HO₂). Several different results are reported here. First, OH and HO₂ measured on the NASA DC-8 agree to within uncertainties with values calculated by two different box models, both in statistical comparisons and as a function of altitude from the surface to 8 km. These comparisons show substantial scatter, likely due to both variability in instrument performance and the difficulty in interpolating measurements made with frequencies different from those of the model time step. Second, OH and HO₂ calculated by a model including HO₂ uptake on aerosol particles in the chemical mechanism are inconsistent with observations. Third, in the planetary boundary layer over both ocean and land, measured and model-calculated OH reactivity are sometimes different, and this missing OH reactivity, which is as much as ∼4 s⁻¹, increased from April to June and originated primarily from the Korean peninsula. Fourth, repeated missed approaches at the Seoul Air Base during several days show that the changes in the sum of ozone and nitrogen dioxide are consistent with ozone production rates calculated from HO2 either observed or modeled by the Langley Research Center model.

Item Type:Article
Related URLs:
URLURL TypeDescription dataset
Brune, William H.0000-0002-1609-4051
Brosius, Alexandra L.0000-0003-2393-3834
Barletta, Barbara0000-0003-3046-014X
Blake, Donald R.0000-0002-8283-5014
Blake, Nicola J.0000-0002-7900-1297
Choi, Yonghoon0000-0001-6529-4722
Crawford, James H.0000-0002-6982-0934
DiGangi, Joshua P.0000-0002-6764-8624
Diskin, Glenn0000-0002-3617-0269
Fried, Alan0000-0002-5230-3527
Hall, Samuel R.0000-0002-2060-7112
Hanisco, Thomas F.0000-0001-9434-8507
Kim, Michelle0000-0002-4922-4334
Meinardi, Simone0000-0003-4828-9889
Teng, Alex0000-0002-6434-0501
Tanner, David J.0000-0001-6445-8713
Ullmann, Kirk0000-0002-4724-9634
Walega, James0000-0001-9167-8121
Weinheimer, Andrew0000-0001-6175-8286
Wisthaler, Armin0000-0001-5050-3018
Wennberg, Paul O.0000-0002-6126-3854
Additional Information:© 2021 The Authors. Published by Elsevier Under a Creative Commons license. Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0). Received 9 July 2021, Revised 9 November 2021, Accepted 13 November 2021, Available online 20 November 2021, Version of Record 24 November 2021. We thank our fellow KORUS_AQ scientists from the United States and Korea, Barry Lefer and the rest of NASA management involved in KORUS-AQ, and the NASA DC-8 pilots and operations crew. VOC measurements by PTR-MS were supported by the Austrian Federal Ministry for Transport, Innovation and Technology (bmvit) through the Austrian Space Applications Programme (ASAP) of the Austrian Research Promotion Agency (FFG). The PTR-MS instrument team (P. Eichler, L. Kaser, T. Mikoviny, M. Müller) is acknowledged for providing the PTR-MS data for this study. SRH and KU were supported by NASA grant NNX15AT99G. WHB, DOM, ABT, and ALB were supported by NASA grants NNX15AT82G and 80NSSC19K1590. Data availability Data and LaRC model output are openly available from the NASA Langley Research Center archive: KORUS-AQ DOI: 10.5067/Suborbital/KORUSAQ/DATA01 (Aknan and Chen, 2017). CRediT authorship contribution statement. William H. Brune: Investigation, Methodology, Writing – original draft, review & editing, Software, Data curation, Formal analysis, Project administration, Supervision; David O. Miller: Investigation, Methodology, Writing - review & editing, Software, Data curation. Alexander B. Thames: Writing - review & editing, Investigation, Data curation. Alexandra L. Brosius: Investigation, Data Curation, Methodology, Software, Formal analysis. Donald R. Blake: Investigation, Data Curation. Nicola J. Blake: Investigation, Data Curation. Gao Chen: Investigation, Data Curation. James H. Crawford: Investigation, Methodology, Data Curation. Joshua P. Digangi: Investigation, Data Curation. Glenn Diskin: Investigation, Data Curation. Alan Fried: Investigation, Data Curation. Samuel R. Hall: Writing - review & editing, Investigation, Data Curation. Thomas F. Hanisco: Investigation, Data Curation. Greg L. Huey: Investigation, Data Curation. Stacey C. Hughes: Investigation, Data Curation. Michelle Kim: Investigation, Data Curation. Simone Meinardi: Investigation, Data Curation. Denise D. Montzka: Investigation, Data Curation. Sally E. Pusede: Investigation, Data Curation. Jason R. Schroeder: Investigation, Data Curation. David J. Tanner: Investigation, Data Curation. Alex Teng: Investigation, Data Curation. Kirk Ullmann: Investigation, Data Curation. James Walega: Investigation, Data Curation. Andrew Weinheimer: Investigation, Data Curation. Armin Wisthaler: Investigation, Data Curation. Paul O. Wennberg: Investigation, Data Curation. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding AgencyGrant Number
Bundesministerium für Verkehr, Innovation und Technologie (BMVIT)UNSPECIFIED
Austrian Research Promotion Agency (FFG)UNSPECIFIED
Subject Keywords:Air quality; Hydroxyl; Hydroperoxyl; Aerosol uptake of hydroperoxyl; Missing OH reactivity; Ozone production rate
Record Number:CaltechAUTHORS:20220513-557938000
Persistent URL:
Official Citation:William H. Brune, David O. Miller, Alexander B. Thames, Alexandra L. Brosius, Barbara Barletta, Donald R. Blake, Nicola J. Blake, Gao Chen, Yonghoon Choi, James H. Crawford, Joshua P. Digangi, Glenn Diskin, Alan Fried, Samuel R. Hall, Thomas F. Hanisco, Greg L. Huey, Stacey C. Hughes, Michelle Kim, Simone Meinardi, Denise D. Montzka, Sally E. Pusede, Jason R. Schroeder, Alex Teng, David J. Tanner, Kirk Ullmann, James Walega, Andrew Weinheimer, Armin Wisthaler, Paul O. Wennberg, Observations of atmospheric oxidation and ozone production in South Korea, Atmospheric Environment, Volume 269, 2022, 118854, ISSN 1352-2310,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114744
Deposited By: George Porter
Deposited On:13 May 2022 23:15
Last Modified:13 May 2022 23:15

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