Distinct chemical and mineralogical composition of Icelandic dust compared to North African and Asian dust

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F20%3A82291" target="_blank" >RIV/60460709:41330/20:82291 - isvavai.cz</a>

Výsledek na webu

<a href="https://acp.copernicus.org/articles/20/13521/2020/acp-20-13521-2020.pdf" target="_blank" >https://acp.copernicus.org/articles/20/13521/2020/acp-20-13521-2020.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/acp-20-13521-2020" target="_blank" >10.5194/acp-20-13521-2020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Distinct chemical and mineralogical composition of Icelandic dust compared to North African and Asian dust

Popis výsledku v původním jazyce

Iceland is a highly active source of natural dust. Icelandic dust has the potential to affect directly the climate via dust-radiation interaction, and indirectly via dust-cloud interaction, snow/ice albedo effect and impacts on biogeochemical cycles. The impacts of Icelandic dust depend on its mineralogical and chemical composition. However, lack of data has prevented an accurate assessment of the role of Icelandic dust in the Earth system. Here, we collected surface sediment samples from five major Icelandic dust hotspots. Dust aerosols were generated and suspended in atmospheric chambers, and PM10 and PM20 fractions were collected for further analysis. We found that the dust samples primarily consist of amorphous basaltic material ranging from 8 wt% (from the Hagavatn hotspot) to 60-90 wt% (other hotspots). Samples had relatively high total Fe content (10-13 wt%). Sequential extraction of Fe to determine its chemical form shows that dithionite Fe (Fe oxides such as hematite and goethite) and ascor

Název v anglickém jazyce

Distinct chemical and mineralogical composition of Icelandic dust compared to North African and Asian dust

Popis výsledku anglicky

Iceland is a highly active source of natural dust. Icelandic dust has the potential to affect directly the climate via dust-radiation interaction, and indirectly via dust-cloud interaction, snow/ice albedo effect and impacts on biogeochemical cycles. The impacts of Icelandic dust depend on its mineralogical and chemical composition. However, lack of data has prevented an accurate assessment of the role of Icelandic dust in the Earth system. Here, we collected surface sediment samples from five major Icelandic dust hotspots. Dust aerosols were generated and suspended in atmospheric chambers, and PM10 and PM20 fractions were collected for further analysis. We found that the dust samples primarily consist of amorphous basaltic material ranging from 8 wt% (from the Hagavatn hotspot) to 60-90 wt% (other hotspots). Samples had relatively high total Fe content (10-13 wt%). Sequential extraction of Fe to determine its chemical form shows that dithionite Fe (Fe oxides such as hematite and goethite) and ascor

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ATMOSPHERIC CHEMISTRY AND PHYSICS

ISSN

1680-7316

e-ISSN

1680-7324

Svazek periodika

20

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

19

Strana od-do

13521-13539

Kód UT WoS článku

000588611700008

EID výsledku v databázi Scopus

2-s2.0-85096139423