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    Source Contributions to Carbon Monoxide Concentrations During KORUS‐AQ Based on CAM‐chem Model Applications

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    Tang_et_al-2019-Journal_of_Geo ...
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    Description:
    Final Published Version
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    Author
    Tang, Wenfu
    Emmons, Louisa K.
    Arellano Jr, Avelino F.
    Gaubert, Benjamin
    Knote, Christoph
    Tilmes, Simone
    Buchholz, Rebecca R.
    Pfister, Gabriele G.
    Diskin, Glenn S.
    Blake, Donald R.
    Blake, Nicola J.
    Meinardi, Simone
    DiGangi, Joshua P.
    Choi, Yonghoon
    Woo, Jung‐Hun
    He, Cenlin
    Schroeder, Jason R.
    Suh, Inseon
    Lee, Hyo‐Jung
    Jo, Hyun‐Young
    Kanaya, Yugo
    Jung, Jinsang
    Lee, Youngjae
    Kim, Danbi
    Show allShow less
    Affiliation
    Univ Arizona, Dept Hydrol & Atmospher Sci
    Issue Date
    2019-03-07
    Keywords
    KORUS-AQ
    source contribution
    carbon monoxide
    CAM-chem
    emissions
    model evaluation
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    Tang, W., Emmons, L. K., Arellano Jr, A. F., Gaubert, B., Knote, C., Tilmes, S., et al. ( 2019). Source contributions to carbon monoxide concentrations during KORUS‐AQ based on CAM‐chem model applications. Journal of Geophysical Research: Atmospheres, 124, 2796– 2822. https://doi.org/10.1029/2018JD029151
    Journal
    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
    Rights
    ©2019. American Geophysical Union. All Rights Reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We investigate regional sources contributing to CO during the Korea United States Air Quality (KORUS-AQ) campaign conducted over Korea (1 May to 10 June 2016) using 17 tagged CO simulations from the Community Atmosphere Model with chemistry (CAM-chem). The simulations use three spatial resolutions, three anthropogenic emission inventories, two meteorological fields, and nine emission scenarios. These simulations are evaluated against measurements from the DC-8 aircraft and Measurements Of Pollution In The Troposphere (MOPITT). Results show that simulations using bottom-up emissions are consistently lower (bias: -34 to -39%) and poorer performing (Taylor skill: 0.38-0.61) than simulations using alternative anthropogenic emissions (bias: -6 to -33%; Taylor skill: 0.48-0.86), particularly for enhanced Asian CO and volatile organic compound (VOC) emission scenarios, suggesting underestimation in modeled CO background and emissions in the region. The ranges of source contributions to modeled CO along DC-8 aircraft from Korea and southern (90 degrees E to 123 degrees E, 20 degrees N to 29 degrees N), middle (90 degrees E to 123 degrees E, 29 degrees N to 38.5 degrees N), and northern (90 degrees E to 131.5 degrees E, 38.5 degrees N to 45 degrees N) East Asia (EA) are 6-13%, similar to 5%, 16-28%, and 9-18%, respectively. CO emissions from middle and northern EA can reach Korea via transport within the boundary layer, whereas those from southern EA are transported to Korea mainly through the free troposphere. Emission contributions from middle EA dominate during continental outflow events (29-51%), while Korean emissions play an overall more important role for ground sites (up to 25-49%) and plumes within the boundary layer (up to 25-44%) in Korea. Finally, comparisons with four other source contribution approaches (FLEXPART 9.1 back trajectory calculations driven by Weather Research and Forecasting (WRF) WRF inert tracer, China signature VOCs, and CO to CO2 enhancement ratios) show general consistency with CAM-chem.
    Note
    6 month embargo; published online: 1 February 2019
    ISSN
    2169-897X
    2169-8996
    DOI
    10.1029/2018jd029151
    Version
    Final published version
    Sponsors
    National Science Foundation (NSF); U.S. Department of Energy (DOE); National Aeronautics and Space Administration (NASA) Earth Observing System (EOS) Program; NCAR Advanced Study Program Postdoctoral Fellowship; Environment Research and Technology Development Fund of the Ministry of the Environment, Japan [2-1505, 2-1803]; National Science Foundation; NASA [NNX16AD96G, NNX16AE16G, NNX17AG39G]
    Additional Links
    https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018JD029151
    ae974a485f413a2113503eed53cd6c53
    10.1029/2018jd029151
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