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| Titel |
Distribution of dust during two dust storms in Iceland |
| VerfasserIn |
Agnes Ösp Magnúsdóttir, Pavla Dagsson-Waldhauserová, Ólafur Arnalds, Haraldur Ólafsson |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250151199
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| Publikation (Nr.) |
 EGU/EGU2017-15759.pdf |
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| Zusammenfassung |
| Particulate matter mass concentrations and size fractions of PM1, PM2.5, PM4, PM10, and
PM15 measured in transversal horizontal profile of two dust storms in southwestern Iceland are
presented. Images from a camera network were used to estimate the visibility and spatial extent of
measured dust events. Numerical simulations were used to calculate the total dust flux from the
sources as 180,000 and 280,000 tons for each storm. The mean PM15 concentrations inside of the dust
plumes varied from 10 to 1600 ?g?m?3 (PM10 = 7 to 583 ?g?m?3). The mean PM1 concentrations
were 97–241 ?g?m?3 with a maximum of 261 ?g?m?3 for the first storm. The PM1/PM2.5 ratios of
>0.9 and PM1/PM10 ratios of 0.34–0.63 show that suspension of volcanic materials in Iceland causes
air pollution with extremely high PM1 concentrations, similar to polluted urban areas in Europe or
Asia. Icelandic volcanic dust consists of a higher proportion of submicron particles compared to
crustal dust. Both dust storms occurred in relatively densely inhabited areas of Iceland. First results
on size partitioning of Icelandic dust presented here should challenge health authorities to enhance
research in relation to dust and shows the need for public dust warning systems. |
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