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    Characteristic Vertical Profiles of Cloud Water Composition in Marine Stratocumulus Clouds and Relationships With Precipitation

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    Name:
    MacDonald_et_al-2018-Journal_o ...
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    Author
    MacDonald, Alexander B. cc
    Dadashazar, Hossein
    Chuang, Patrick Y.
    Crosbie, Ewan
    Wang, Hailong
    Wang, Zhen cc
    Jonsson, Haflidi H.
    Flagan, Richard C.
    Seinfeld, John H.
    Sorooshian, Armin
    Affiliation
    Univ Arizona, Dept Chem & Environm Engn
    Issue Date
    2018-04-16
    Keywords
    cloud water
    stratocumulus
    scavenging
    rainout
    sea salt
    aerosol
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    MacDonald, A. B., Dadashazar, H., Chuang, P. Y., Crosbie, E., Wang, H., Wang, Z., et al. (2018). Characteristic vertical profiles of cloud water composition in marine stratocumulus clouds and relationships with precipitation. Journal of Geophysical Research: Atmospheres, 123, 3704–3723. https://doi.org/10.1002/2017JD027900
    Journal
    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
    Rights
    © 2018. 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
    This study uses airborne cloud water composition measurements to characterize the vertical structure of air-equivalent mass concentrations of water-soluble species in marine stratocumulus clouds off the California coast. A total of 385 cloud water samples were collected in the months of July and August between 2011 and 2016 and analyzed for water-soluble ionic and elemental composition. Three characteristic profiles emerge: (i) a reduction of concentration with in-cloud altitude for particulate species directly emitted from sources below cloud without in-cloud sources (e.g., Cl- and Na+), (ii) an increase of concentration with in-cloud altitude (e.g., NO2- and formate), and (iii) species exhibiting a peak in concentration in the middle of cloud (e.g., non-sea-salt SO42-, NO3-, and organic acids). Vertical profiles of rainout parameters such as loss frequency, lifetime, and change in concentration with respect to time show that the scavenging efficiency throughout the cloud depth depends strongly on the thickness of the cloud. Thin clouds exhibit a greater scavenging loss frequency at cloud top, while thick clouds have a greater scavenging loss frequency at cloud base. The implications of these results for treatment of wet scavenging in models are discussed.
    Note
    6 month embargo; published online: 21 February 2018
    ISSN
    2169-897X
    DOI
    10.1002/2017JD027900
    Version
    Final published version
    Sponsors
    Office of Naval Research [N0001410- 1-0811, N00014-11-1-0783, N00014-10-1-0200, N00014-04-1-0118, N00014-16-1-2567]; Mexican National Council for Science and Technology (CONACyT); United States Department of Energy (DOE) Office of Science, Biological and Environmental Research; DOE by Battelle Memorial Institute [DE-AC05-76RLO1830]
    Additional Links
    https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017JD027900
    ae974a485f413a2113503eed53cd6c53
    10.1002/2017JD027900
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