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    Wildfire and climate interactions across the Southwest United States

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    Author
    Crimmins, Michael Alan
    Issue Date
    2004
    Keywords
    Physical Geography.
    Geophysics.
    Advisor
    Comrie, Andrew C.
    
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    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Variability in climate and wildfire activity are inextricably linked through complex and often poorly understood processes. The studies presented in this dissertation examine fire-climate relationships across the southwestern United States at different temporal and spatial scales. Collectively, they identify that low-frequency and high-frequency changes in climatic variables important to wildfire are connected through teleconnection patterns originating in the tropical and extratropical Pacific Ocean (El Nino-Southern Oscillation [ENSO] and Pacific Decadal Oscillation [PDO]). Variability in precipitation years prior to a wildfire season appears to affect the overall number of fires and total area burned by either promoting or limiting the growth of fine fuels and also controlling moisture levels in heavy fuels. The same mechanisms (ENSO & PDO) that play a role in precipitation variability across the Southwest also appear to modulate the frequency of extreme fire weather events during the spring fire season. Identifying links between high and low frequency climatic variables important to wildfire variability provides additional insight into the complex mechanisms that link wildfire and climate. The results of this dissertation will aid in improving wildfire planning efforts that extend seasons to decades into the future.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Geography and Regional Development
    Degree Grantor
    University of Arizona
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