Journal article
Last Glacial loess in the conterminous USA
Quaternary Science Reviews, Vol.22(18-19), pp.1907-1946
09/01/2003
DOI: 10.1016/S0277-3791(03)00169-0
Abstract
The conterminous United States contains an extensive and generally well-studied record of Last Glacial loess. The loess occurs in diverse physiographic provinces, and under a wide range of climatic and ecological conditions. Both glacial and non-glacial loess sources are present, and many properties of the loess vary systematically with distance from loess sources. United States’ mid-continent Last Glacial loess is probably the thickest in the world, and our calculated mass accumulation rates (MARs) are as high as 17,500 g/m2/yr at the Bignell Hill locality in Nebraska, and many near-source localities have MARs greater than 1500 g/m2/yr. These MARs are high relative to rates calculated in other loess provinces around the world. Recent models of Last Glacial dust sources fail to predict the extent and magnitude of dust flux from the mid-continent of the United States. A better understanding of linkages between climate, ice sheet behaviour, routing of glacial meltwater, land surface processes beyond the ice margin, and vegetation is needed to improve the predictive capabilities of models simulating dust flux from this region.
Details
- Title: Subtitle
- Last Glacial loess in the conterminous USA
- Creators
- E. Arthur Bettis III - University of IowaDaniel R. MuhsHelen M. RobertsAnn G. Wintle
- Resource Type
- Journal article
- Publication Details
- Quaternary Science Reviews, Vol.22(18-19), pp.1907-1946
- DOI
- 10.1016/S0277-3791(03)00169-0
- ISSN
- 0277-3791
- Language
- English
- Date published
- 09/01/2003
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9983557505302771
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