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The Mineral Dust Record in a High Altitude Alpine Glacier (Colle Gnifetti, Swiss Alps)

  • Dietmar Wagenbach
  • Klaus Geis
Part of the NATO ASI Series book series (ASIC, volume 282)

Abstract

Ice-core and snow-pit samples from a non-temperated glacier in the summit range of Monte Rosa, Swiss Alps (4450 m.a.s.l.) has been analyzed for total mineral dust and the size distribution of insoluble particulate matter in the size range 0.63–20 microns. Based on a 50 years-record Saharan dust accounts for two third of the mean mineral dust flux of 60 μgcm-2yr-1. Both, background and Saharan dust influenced samples show a distinct mode in the volume size distribution of insoluble particles over the optical active size range with a typical volume mean diameter of 2.5 and 4.5 μm, respectively. These two size distribution categories are attributed to the insoluble fraction of the long lived background aerosol and to the relatively short lived aerosol dominated by soil derived dust (i.e. ground-level aerosol in aride areas).

Keywords

Mineral Dust Saharan Dust Insoluble Particle Volume Size Distribution Total Particle Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Dietmar Wagenbach
    • 1
  • Klaus Geis
    • 1
  1. 1.Institut für UmweltphysikUniversität HeidelbergHeidelbergGermany

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