Physical properties of suspended dust during moist and low wind conditions in Iceland

0432640 - GLÚ 2015 RIV IS eng J - Článek v odborném periodiku
Dagsson-Waldhauserova, P. - Arnalds, O. - Olafsson, H. - Škrabalová, L. - Sigurdardottir, G. M. - Braniš, M. - Hladil, Jindřich - Skála, Roman - Navrátil, Tomáš - Chadimová, Leona - Lowis of Menar, S. - Thorsteinsson, T. - Carlsen, H. K. - Jonsdottir, I.
Physical properties of suspended dust during moist and low wind conditions in Iceland.
Icelandic Agricultural Sciences. Roč. 27, č. 1 (2014), s. 25-39. ISSN 1670-567X
Institucionální podpora: RVO:67985831
Klíčová slova: atmospheric measurements * dust storm event * surface heating * dust aerosol * climate aspects
Kód oboru RIV: DB - Geologie a mineralogie
Impakt faktor: 0.188, rok: 2014
http://www.ias.is/landbunadur/wgsamvef.nsf/Attachment/IAS%20-%204%20kafli%20Pavla/$file/IAS%20-%204%20kafli%20Pavla.pdf

We measured a dust event which occurred during wet and low wind/windless conditions as the result of surface heating in August 2013. Maximum particle number concentration (PM~0.3-10 μm) reached 149,954 particles cm-3 min-1 while mass concentration (PM<10 μm) was 1757 μg m-3 min-1. The suspended dust was very fine with the highest number of particles in the size range 0.3-0.337 μm, followed by particles 1.5-5 μm in diameter. Close-to-ultrafine particle size distributions showed a significant increase in number with the severity of the measured dust event (during dust peaks). Number concentrations were well correlated with mass concentrations. The mineralogy and geochemical compositions showed that glaciogenic dust contains sharp-tipped shards with bubbles and 80 % of the particulate matter is volcanic glass rich in heavy metals. Wet dust particles were mobilized within < 4 hours. This is the first scientific study of particle size distributions in an Icelandic dust event including findings on initiation of dust suspension.
Trvalý link: http://hdl.handle.net/11104/0237027