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    On the Relevance of Aerosols to Snow Cover Variability Over High Mountain Asia

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    Name:
    Geophysical Research Letters - ...
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    1.820Mb
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    Author
    Roychoudhury, C.
    He, C.
    Kumar, R.
    McKinnon, J.M.
    Arellano, A.F., Jr.
    Affiliation
    Department of Hydrology and Atmospheric Sciences, University of Arizona
    Issue Date
    2022
    Keywords
    aerosol-meteorology interactions
    ERA5/CAMS-EAC4
    High Mountain Asia
    relative importance
    snow cover
    
    Metadata
    Show full item record
    Publisher
    John Wiley and Sons Inc
    Citation
    Roychoudhury, C., He, C., Kumar, R., McKinnon, J. M., & Arellano, A. F., Jr. (2022). On the Relevance of Aerosols to Snow Cover Variability Over High Mountain Asia. Geophysical Research Letters, 49(18).
    Journal
    Geophysical Research Letters
    Rights
    Copyright © 2022. 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
    While meteorology and aerosols are identified as key drivers of snow cover (SC) variability in High Mountain Asia, complex non-linear interactions between them are not adequately quantified. Here, we attempt to unravel these interactions through a simple relative importance (RI) analysis of meteorological and aerosol variables from ERA5/CAMS-EAC4 reanalysis against satellite-derived SC from Moderate Resolution Imaging Spectroradiometer across 2003–2018. Our results show a statistically significant 7% rise in the RI of aerosol-meteorology interactions (AMI) in modulating SC during late snowmelt season (June and July), notably over low snow-covered (LSC) regions. Sensitivity tests further reveal that the importance of meteorological interactions with individual aerosol species are more prominent than total aerosols over LSC regions. We find that the RI of AMI for LSC regions is clearly dominated by carbonaceous aerosols, on top of the expected importance of dynamic meteorology. These findings clearly highlight the need to consider AMI in hydrometeorological monitoring, modeling, and reanalyses. © 2022. American Geophysical Union. All Rights Reserved.
    Note
    6 month embargo; first published: 20 September 2022
    ISSN
    0094-8276
    DOI
    10.1029/2022GL099317
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1029/2022GL099317
    Scopus Count
    Collections
    UA Faculty Publications

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