 |
| Titel |
Aircraft-based observations and high-resolution simulations of an Icelandic dust storm |
| VerfasserIn |
A.-M. Blechschmidt, J. E. Kristjánsson, H. Ólafsson, J. F. Burkhart, Ø. Hodnebrog, P. D. Rosenberg |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 22 ; Nr. 12, no. 22 (2012-11-16), S.10649-10666 |
| Datensatznummer |
250011589
|
| Publikation (Nr.) |
 copernicus.org/acp-12-10649-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| The first aircraft-based observations of an Icelandic dust storm are
presented. The measurements were carried out over the ocean near Iceland's
south coast in February 2007. This dust event occurred in conjunction with an
easterly barrier jet of more than 30 m s−1. The aircraft measurements
show high particle mass mixing ratios in an area of low wind speeds in the
wake of Iceland near the coast, decreasing abruptly towards the jet.
Simulations from the Weather Research and Forecasting Model coupled with
Chemistry (WRF/Chem) indicate that the measured high mass mixing ratios and
observed low visibility inside the wake are due to dust transported from
Icelandic sand fields towards the ocean. This is confirmed by meteorological
station data. Glacial outwash terrains located near the Mýrdalsjökull
glacier are among simulated dust sources. Sea salt aerosols produced by the
impact of strong winds on the ocean surface started to dominate as the
aircraft flew away from Iceland into the jet. The present results support
recent studies which suggest that Icelandic deserts should be considered as
important dust sources in global and regional climate models. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|