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    Discerning “Flavors” of Drought Using Climate Extremes Indices

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    jamc-d-16-0270.1.pdf
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    Author
    Crimmins, Michael A.
    Ferguson, Daniel B.
    Meadow, Alison M.
    Weiss, Jeremy L.
    Affiliation
    Univ Arizona, Dept Soil Water & Environm Sci
    Univ Arizona, Inst Environm
    Univ Arizona, Sch Nat Resources & Environm
    Issue Date
    2017-04
    
    Metadata
    Show full item record
    Publisher
    AMER METEOROLOGICAL SOC
    Citation
    Discerning “Flavors” of Drought Using Climate Extremes Indices 2017, 56 (4):989 Journal of Applied Meteorology and Climatology
    Journal
    Journal of Applied Meteorology and Climatology
    Rights
    © 2017 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
    Monitoring drought conditions in arid and semiarid regions characterized by high levels of intra-and interannual hydroclimatic variability is a challenging task. Typical drought-monitoring indices that are based on monthly-scale data lack sufficient temporal resolution to detect hydroclimatic extremes and, when used operationally, may not provide adequate indication of drought status. In a case study focused on the Four Corners region of the southwestern United States, the authors used recently standardized World Meteorological Organization climate extremes indices to discern intra-annual hydroclimatic extremes and diagnose potential drought status in conjunction with the simple metric of annual total precipitation. By applying datareduction methods to a suite of metrics calculated using daily data for 1950-2014, the authors identified five extremes indices that provided additional insight into interannual hydroclimatic variability. Annual time series of these indices revealed anomalous years characterized by shifts in the seasonal distribution of precipitation and in the intensity and frequency of individual events. The driest 4-yr intervals over the study period, characterized by similar annual and interval total precipitation anomalies, represent dramatically different assemblages of index values, which are interpreted as different "flavors'' of drought. In turn, it is expected that varying drought impacts on ecosystems, agricultural systems, and water resources would emerge under these different flavors of drought. Results from this study indicate that operational drought monitoring and historical drought assessments in arid and semiarid regions would benefit from the additional insight that daily-based hydroclimatic extremes indices provide, especially in light of expected climate change-driven changes to the hydrologic cycle.
    Note
    6 month embargo; Published Online: 22 March 2017
    ISSN
    1558-8424
    1558-8432
    DOI
    10.1175/JAMC-D-16-0270.1
    Version
    Final published version
    Sponsors
    National Oceanic and Atmospheric Administration's Climate Program Office from Regional Integrated Science and Assessment Program [NA13OAR4310166]; National Oceanic and Atmospheric Administration's Climate Program Office from Sectoral Applications Research Program [NA10OAR4310183]
    Additional Links
    http://journals.ametsoc.org/doi/10.1175/JAMC-D-16-0270.1
    ae974a485f413a2113503eed53cd6c53
    10.1175/JAMC-D-16-0270.1
    Scopus Count
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    UA Faculty Publications

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