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    Centennial-to-millennial hydrologic trends and variability along the North Atlantic Coast, USA, during the Holocene

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    Date
    2014-06-25
    Author
    Newby, Paige E.  Concept link
    Shuman, Bryan N.  Concept link
    Donnelly, Jeffrey P.  Concept link
    Karnauskas, Kristopher B.  Concept link
    Marsicek, Jeremiah  Concept link
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    Citable URI
    https://hdl.handle.net/1912/6858
    As published
    https://doi.org/10.1002/2014GL060183
    DOI
    10.1002/2014GL060183
    Keyword
     Holocene; Paleohydrology; Northeast U.S.; Ground-penetrating radar; Lake levels; Drought 
    Abstract
    Geophysical and sedimentary records from five lakes in Massachusetts reveal regionally coherent hydrologic variability during the Holocene. All of the lakes have risen since ~9.0 ka, but multicentury droughts after 5.6 ka repeatedly lowered their water levels. Quantified water level histories from the three best-studied lakes share >70% of their reconstructed variance. Four prominent low-water phases at 4.9–4.6, 4.2–3.9, 2.9–2.1, and 1.3–1.2 ka were synchronous across coastal lakes, even after accounting for age uncertainties. The droughts also affected sites up to ~200 km inland, but water level changes at 5.6–4.9 ka appear out of phase between inland and coastal lakes. During the enhanced multicentury variability after ~5.6 ka, droughts coincided with cooling in Greenland and may indicate circulation changes across the North Atlantic region. Overall, the records demonstrate that current water levels are exceptionally high and confirm the sensitivity of water resources in the northeast U.S. to climate change.
    Description
    Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 41 (2014): 4300–4307, doi:10.1002/2014GL060183.
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    • Geology and Geophysics (G&G)
    Suggested Citation
    Geophysical Research Letters 41 (2014): 4300–4307
     

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