A long-term perspective on a modern drought in the American Southeast

N. Pederson, A. R. Bell, T. A. Knight, C. Leland, N. Malcomb, K. J. Anchukaitis, K. Tackett, J. Scheff, A. Brice, B. Catron, W. Blozan, J. Riddle

    Research output: Contribution to journalArticlepeer-review


    The depth of the 20069 drought in the humid, southeastern US left several metropolitan areas with only a 60120day water supply. To put the regions recent drought variability in a long-term perspective, a dense and diverse tree-ring networkincluding the first records throughout the ApalachicolaChattahoocheeFlint river basinis used to reconstruct drought from 1665 to 2010 CE. The network accounts for up to 58.1% of the annual variance in warm-season drought during the 20th century and captures wet eras during the middle to late 20th century. The reconstruction shows that the recent droughts are not unprecedented over the last 346years. Indeed, droughts of extended duration occurred more frequently between 1696 and 1820. Our results indicate that the era in which local and state water supply decisions were developed and the period of instrumental data upon which it is based are amongst the wettest since at least 1665. Given continued growth and subsequent industrial, agricultural and metropolitan demand throughout the southeast, insights from paleohydroclimate records suggest that the threat of water-related conflict in the region has potential to grow more intense in the decades to come.

    Original languageEnglish (US)
    Article number014034
    JournalEnvironmental Research Letters
    Issue number1
    StatePublished - Jan 2012


    • Southeastern US
    • paleohydroclimate
    • tree-ring analysis
    • water conflict
    • water supply

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • General Environmental Science
    • Public Health, Environmental and Occupational Health


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