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    Profiles of MBL Cloud and Drizzle Microphysical Properties Retrieved From Ground‐Based Observations and Validated by Aircraft In Situ Measurements Over the Azores

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    2019JD032205.pdf
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    Author
    Wu, Peng
    Dong, Xiquan cc
    Xi, Baike
    Tian, Jingjing
    Ward, Dale M.
    Affiliation
    Univ Arizona, Dept Hydrol & Atmospher Sci
    Issue Date
    2020-04-23
    Keywords
    aircraft measurements
    cloud and precipitation
    ground-based observations
    microphysics retrieval
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    Wu, P., Dong, X., Xi, B., Tian, J., & Ward, D. M. (2020). Profiles of MBL cloud and drizzle microphysical properties retrieved from ground‐based observations and validated by aircraft in situ measurements over the Azores. Journal of Geophysical Research: Atmospheres, 125(9), e2019JD032205.
    Journal
    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
    Rights
    © 2020. 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
    The profiles of marine boundary layer (MBL) cloud and drizzle microphysical properties are important for studying the cloud-to-rain conversion and growth processes in MBL clouds. However, it is challenging to simultaneously retrieve both cloud and drizzle microphysical properties within an MBL cloud layer using ground-based observations. In this study, methods were developed to first decompose drizzle and cloud reflectivity in MBL clouds from Atmospheric Radiation Measurement cloud radar reflectivity measurements and then simultaneously retrieve cloud and drizzle microphysical properties during the Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA) campaign. These retrieved microphysical properties, such as cloud and drizzle particle size (r(c) and r(m,d)), their number concentration (N-c and N-d) and liquid water content (LWCc and LWCd), have been validated by aircraft in situ measurements during ACE-ENA (158 hr of aircraft data). The mean surface retrieved (in situ measured) r(c), N-c, and LWCc are 10.9 mu m (11.8 mu m), 70 cm(-3) (60 cm(-3)), and 0.21 g m(-3) (0.22 g m(-3)), respectively. For drizzle microphysical properties, the retrieved (in situ measured) r(d), N-d, and LWCd are 44.9 mu m (45.1 mu m), 0.07 cm(-3) (0.08 cm(-3)), and 0.052 g m(-3) (0.066 g m(-3)), respectively. Treating the aircraft in situ measurements as truth, the estimated median retrieval errors are 15% for r(c), 35% for N-c, 30% for LWCc and r(d), and 50% for N-d and LWCd. The findings from this study will provide insightful information for improving our understanding of warm rain processes, as well as for improving model simulations. More studies are required over other climatic regions.
    Note
    6 month embargo; first published online 23 April 2020
    ISSN
    2169-897X
    EISSN
    2169-8996
    DOI
    10.1029/2019jd032205
    Version
    Final published version
    Sponsors
    National Science Foundation
    ae974a485f413a2113503eed53cd6c53
    10.1029/2019jd032205
    Scopus Count
    Collections
    UA Faculty Publications

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