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    Characteristics of Ice Cloud–Precipitation of Warm Season Mesoscale Convective Systems over the Great Plains

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    Author
    Tian, Jingjing
    Dong, Xiquan cc
    Xi, Baike
    Feng, Zhe
    Affiliation
    Univ Arizona, Dept Hydrol & Atmospher Sci
    Issue Date
    2020-02-21
    Keywords
    Atmosphere
    North America
    Cloud microphysics
    Clouds
    Radars
    Radar observations
    
    Metadata
    Show full item record
    Publisher
    AMER METEOROLOGICAL SOC
    Citation
    Characteristics of Ice Cloud–Precipitation of Warm Season Mesoscale Convective Systems over the Great Plains: Journal of Hydrometeorology: Vol 21, No 2. (2020). Retrieved April 14, 2020, from Journal of Hydrometeorology website: https://journals.ametsoc.org/doi/10.1175/JHM-D-19-0176.1 ‌
    Journal
    JOURNAL OF HYDROMETEOROLOGY
    Rights
    Copyright © 2020 American Meteorological Society.
    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
    In this study, the mesoscale convective systems (MCSs) are tracked using high-resolution radar and satellite observations over the U.S. Great Plains during April-August from 2010 to 2012. The spatiotemporal variability of MCS precipitation is then characterized using the Stage IV product. We found that the spatial variability and nocturnal peaks of MCS precipitation are primarily driven by the MCS occurrence rather than the precipitation intensity. The tracked MCSs are further classified into convective core (CC), stratiform rain (SR), and anvil clouds regions. The spatial variability and diurnal cycle of precipitation in the SR regions of MCSs are not as significant as those of MCS precipitation. In the SR regions, the high-resolution, long-term ice cloud microphysical properties [ice water content (IWC) and ice water paths (IWPs)] are provided. The IWCs generally decrease with height. Spatially, the IWC, IWP, and precipitation are all higher over the southern Great Plains than over the northern Great Plains. Seasonally, those ice and precipitation properties are all higher in summer than in spring. Comparing the peak timings of MCS precipitation and IWPs from the diurnal cycles and their composite evolutions, it is found that when using the peak timing of IWPSR as a reference, the heaviest precipitation in the MCS convective core occurs earlier, while the strongest SR precipitation occurs later. The shift of peak timings could be explained by the stratiform precipitation formation process. The IWP and precipitation relationships are different at MCS genesis, mature, and decay stages. The relationships and the transition processes from ice particles to precipitation also depend on the low-level humidity.
    Note
    6 month embargo; published online: 21 February 2020
    ISSN
    1525-755X
    DOI
    10.1175/jhm-d-19-0176.1
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1175/jhm-d-19-0176.1
    Scopus Count
    Collections
    UA Faculty Publications

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