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| Titel |
Long-term variability of dust events in Iceland (1949–2011) |
| VerfasserIn |
P. Dagsson-Waldhauserová, O. Arnalds, H. Ólafsson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 24 ; Nr. 14, no. 24 (2014-12-16), S.13411-13422 |
| Datensatznummer |
250119245
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| Publikation (Nr.) |
 copernicus.org/acp-14-13411-2014.pdf |
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| Zusammenfassung |
| The long-term frequency of atmospheric dust observations was investigated for
the southern part of Iceland and interpreted together with earlier results
obtained from northeastern (NE) Iceland (Dagsson-Waldhauserova et al., 2013).
In total, over 34 dust days per year on average occurred in Iceland based on
conventionally used synoptic codes for dust observations. However, frequent
volcanic eruptions, with the re-suspension of volcanic materials and dust
haze, increased the number of dust events fourfold (135 dust days annually).
The position of the Icelandic Low determined whether dust events occurred in the
NE (16.4 dust days annually) or in the southern (S) part of Iceland (about 18
dust days annually). The decade with the most frequent dust days in S Iceland was the
1960s, but the 2000s in NE Iceland. A total of
32 severe dust storms (visibility < 500 m) were observed in Iceland
with the highest frequency of events during the 2000s in S Iceland. The Arctic dust
events (NE Iceland) were typically warm, occurring during summer/autumn
(May–September) and during mild southwesterly winds, while the subarctic dust events
(S Iceland) were mainly cold, occurring during winter/spring (March–May)
and during strong northeasterly winds. About half of the dust events in S Iceland
occurred in winter or at sub-zero temperatures. A good correlation was found
between particulate matter (PM10) concentrations and visibility during dust observations at
the stations Vík and Stórhöfði. This study shows that Iceland is among the
dustiest areas of the world and that dust is emitted year-round. |
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