Podrobnosti záznamu

Název
    Physical properties of suspended dust during moist and low wind conditions in Iceland
Autor
    Arnalds, O.
    Braniš, M.
    Carlsen, H. K.
    Chadimová, Leona
    Dagsson-Waldhauserova, P.
    Hladil, Jindřich
    Jonsdottir, I.
    Lowis of Menar, S.
    Navrátil, Tomáš
    Olafsson, H.
    Sigurdardottir, G. M.
    Skála, Roman
    Škrabalová, L.
    Thorsteinsson, T.
Jazyk
    anglicky
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Icelandic Agricultural Sciences
Svazek/č.
    Roč. 27, č. 1
Strany
    s. 25-39
Rok
    2014
Poznámky
    Rozsah: 15 s. : E
Předmětová kategorie
    atmospheric measurements
    climate aspects
    dust aerosol
    dust storm event
    surface heating
Klíčové slovo
    Conditions
    During
    Dust
    Iceland
    Low
    Moist
    Physical
    Properties
    Suspended
    Wind
Abstrakt (anglicky)
   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.
Přispěvatel
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
    U
Datum importu
    23. 10. 2014