Eolian Sediments in the Greater Platte River Basins, Great Plains
The Greater Platte River Basins occupies a large part of the Great Plains of central North America. It is a semiarid region and like most semiarid regions, experiences a wide range of variability in year-to-year precipitation. This makes the region's geomorphic systems highly sensitive to climate changes. Much of the Greater Platte River Basins is covered with eolian sediments (dune sand, sheet sand, and loess) that are stabilized mostly by vegetation. Reactivation of these deposits is a distinct possibility with shifts in the overall moisture balance, because stabilizing vegetation is dependent on precipitation. Effects of future reactivation of eolian sand or loess would be high and would affect grazing land, agricultural land, wildlife habitats, and infrastructure.
A Task of the Greater Platte River Basins and Northern Plains Geologic Framework Studies Project.
Objectives
One objective of this work is to understand the dynamics of sand dune formation and activity in the Greater Platte River Basins. A second objective is to infer past climates from loess (windblown silt) records and compare results with general circulation models; paleoclimate data are fundamental to understanding future climate change and its potential effect.
The Greater Platte River Basins occupies a large part of the Great Plains of central North America. It is a semiarid region and like most semiarid regions, experiences a wide range of variability in year-to-year precipitation. This makes the region's geomorphic systems highly sensitive to climate changes. Much of the Greater Platte River Basins is covered with eolian sediments (dune sand, sheet sand, and loess) that are stabilized mostly by vegetation. Reactivation of these deposits is a distinct possibility with shifts in the overall moisture balance, because stabilizing vegetation is dependent on precipitation. Effects of future reactivation of eolian sand or loess would be high and would affect grazing land, agricultural land, wildlife habitats, and infrastructure.
A Task of the Greater Platte River Basins and Northern Plains Geologic Framework Studies Project.
Objectives
One objective of this work is to understand the dynamics of sand dune formation and activity in the Greater Platte River Basins. A second objective is to infer past climates from loess (windblown silt) records and compare results with general circulation models; paleoclimate data are fundamental to understanding future climate change and its potential effect.