2001
DOI: 10.1016/s0921-8181(00)00092-8
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Temporal and spatial patterns of Holocene dune activity on the Great Plains of North America: megadroughts and climate links

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Cited by 239 publications
(231 citation statements)
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References 99 publications
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“…Expanded upper and lower treelines (Fall, 1997), northward expansion of C 4 grasses and tropical elements in packrat middens (Van Devender, 1990;McAuliffe and Van Devender, 1998), and climate model output (Rind, 1994;Kutzbach, 1998) all indicate greater-than-modern summer temperatures and precipitation during the mid-Holocene (~8000-4000 yr B.P). In contrast, desiccating or intermittent lakes from the U.S.A.-Mexico borderlands northward (Waters, 1989;Davis and Shafer, 1992;Anderson, 1993;Hasbargen, 1994;Krider, 1998), peak dune activity in the Great Plains (Forman, 2001) and the decline in midden production throughout the southwestern United States (Webb and Betancourt, 1990;Spaulding, 1991) indicate pervasive mid-Holocene winter drought. While warm wet summers and dry winters would tend to favor C 4 grasses over C 3 desert shrubs, we suggest the absence of C 3 desert shrubs during the mid-Holocene was due to colder-than-present winter temperatures prior to ~5000-4000 yr B.P.…”
Section: Mid-to Late Holocenementioning
confidence: 99%
“…Expanded upper and lower treelines (Fall, 1997), northward expansion of C 4 grasses and tropical elements in packrat middens (Van Devender, 1990;McAuliffe and Van Devender, 1998), and climate model output (Rind, 1994;Kutzbach, 1998) all indicate greater-than-modern summer temperatures and precipitation during the mid-Holocene (~8000-4000 yr B.P). In contrast, desiccating or intermittent lakes from the U.S.A.-Mexico borderlands northward (Waters, 1989;Davis and Shafer, 1992;Anderson, 1993;Hasbargen, 1994;Krider, 1998), peak dune activity in the Great Plains (Forman, 2001) and the decline in midden production throughout the southwestern United States (Webb and Betancourt, 1990;Spaulding, 1991) indicate pervasive mid-Holocene winter drought. While warm wet summers and dry winters would tend to favor C 4 grasses over C 3 desert shrubs, we suggest the absence of C 3 desert shrubs during the mid-Holocene was due to colder-than-present winter temperatures prior to ~5000-4000 yr B.P.…”
Section: Mid-to Late Holocenementioning
confidence: 99%
“…The Dust Bowl drought was likely unique during the instrumental era, but similar drought patterns can be found during the Medieval Climate Anomaly (MCA) (4). Typical North American droughts during the MCA were longer lasting (on the order of decades) and more intense (21), and were accompanied by large-scale dune mobilization over parts of the Great Plains (22). This movement of dunes implies a nearcomplete loss of vegetation cover (in this case induced naturally by an intense and persistent drought) and the possibility of a productive dust source and subsequent aerosol and vegetation feedbacks.…”
mentioning
confidence: 99%
“…The geologic record provides evidence for widespread and recurrent dune mobilization events during the MCA (Forman et al 2001;Hanson et al 2010;Miao et al 2007), with the most recent events likely occurring during the fourteenth and fifteenth centuries. These events were driven primarily by megadrought-induced vegetation mortality and reductions in vegetation cover.…”
Section: Boundary Conditionsmentioning
confidence: 99%
“…These droughts had significant ecological and societal consequences, causing major disruptions in regional civilizations (e.g., Benson et al 2007a,b;Douglass 1929) and leading to widespread vegetation mortality and dune mobilization (Forman et al 2001;Hanson et al 2010;Miao et al 2007). These so-called megadroughts are not only unprecedented in the instrumental record but are also largely absent in climate reconstructions of the last 500 years.…”
Section: Introductionmentioning
confidence: 99%
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