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The Effect of Microtopography and Vegetation on the Catchment of Airborne Particles Measured by Remanent Magnetism

Published online by Cambridge University Press:  20 January 2017

Frank Oldfield ,
Ann Brown  and
Roy Thompson
Frank Oldfield
Affiliation:
Department of Geography, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX, England
Ann Brown
Affiliation:
Department of Geography, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX, England
Roy Thompson
Affiliation:
Department of Geophysics, University of Edinburgh, Edinburgh, EH9 3JZ, Scotland
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Abstract

Measurements of saturation isothermal remanent magnetization (SIRM) for recent ombrotrophic peats show that the rate of deposition of magnetic particulates from the atmosphere varies strongly in response to the persistent, small-scale, spatial changes in vegetation and microtopography characteristic of many raised bogs. Hummock environments may trap over an order of magnitude more magnetic particulates than do Sphagnum lawns and pools. These results, thought to reflect the interception of subhorizontally moving particles by the hummock forming plants, have potentially important implications for studies of pollen deposition (“influx”) rates in peat.

Type
Research Article
Information
Quaternary Research , Volume 12 , Issue 3 , November 1979 , pp. 326 - 332
Copyright
University of Washington

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