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Naslov:Probing Iceland's dust-emitting sediments: : particle size distribution, mineralogy, cohesion, Fe mode of occurrence, and reflectance spectra signatures
Avtorji:ID Gonzalez-Romero, Adolfo (Avtor)
ID González-Flórez, Cristina (Avtor)
ID Panta, Agnesh (Avtor)
ID Yus-Díez, Jesús (Avtor)
ID Córdoba, Patricia (Avtor)
ID Alastuey, Andrés (Avtor)
ID Moreno, Natalia (Avtor)
ID Kandler, Konrad (Avtor)
ID Klose, Martina (Avtor)
ID Clark, Roger N. (Avtor), et al.
Datoteke:URL https://acp.copernicus.org/articles/24/6883/2024/
 
.pdf acp-24-6883-2024.pdf (13,19 MB)
MD5: 02C8B7348A22F18CDC05D285EBE8BF7C
 
URL https://acp.copernicus.org/articles/24/6883/2024/acp-24-6883-2024.pdf
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Abstract. Characterising the physico-chemical properties of dust-emitting sediments in arid regions is fundamental to understanding the effects of dust on climate and ecosystems. However, knowledge regarding high-latitude dust (HLD) remains limited. This study focuses on analysing the particle size distribution (PSD), mineralogy, cohesion, iron (Fe) mode of occurrence, and visible–near infrared (VNIR) reflectance spectra of dust-emitting sediments from dust hotspots in Iceland (HLD region). Extensive analysis was conducted on samples of top sediments, sediments, and aeolian ripples collected from seven dust sources, with particular emphasis on the Jökulsá basin, encompassing the desert of Dyngjunsandur. Both fully and minimally dispersed PSDs and their respective mass median particle diameters revealed remarkable similarities (56 ± 69 and 55 ± 62 µm, respectively). Mineralogical analyses indicated the prevalence of amorphous phases (68 ± 26 %), feldspars (17 ± 13 %), and pyroxenes (9.3 ± 7.2 %), consistent with thorough analyses of VNIR reflectance spectra. The Fe content reached 9.5 ± 0.40 wt %, predominantly within silicate structures (80 ± 6.3 %), complemented by magnetite (16 ± 5.5 %), hematite/goethite (4.5 ± 2.7 %), and readily exchangeable Fe ions or Fe nano-oxides (1.6 ± 0.63 %). Icelandic top sediments exhibited coarser PSDs compared to the high dust-emitting crusts from mid-latitude arid regions, distinctive mineralogy, and a 3-fold bulk Fe content, with a significant presence of magnetite. The congruence between fully and minimally dispersed PSDs underscores reduced particle aggregation and cohesion of Icelandic top sediments, suggesting that aerodynamic entrainment of dust could also play a role upon emission in this region, alongside saltation bombardment. The extensive analysis in Dyngjusandur enabled the development of a conceptual model to encapsulate Iceland's rapidly evolving high dust-emitting environments.
Ključne besede:mineral dust, high-latitude dust, Icelandic dust, aerosol particles
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2024
Leto izida:2024
Št. strani:str. 6883-6910
Številčenje:Vol. 24, issue 11
PID:20.500.12556/RUNG-9513 Novo okno
COBISS.SI-ID:216983811 Novo okno
UDK:502.3/.7
ISSN pri članku:1680-7324
eISSN:1680-7324
DOI:10.5194/acp-24-6883-2024 Novo okno
NUK URN:URN:SI:UNG:REP:4KOSEW0K
Datum objave v RUNG:29.11.2024
Število ogledov:194
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
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Gradivo je del revije

Naslov:Atmospheric chemistry and physics
Skrajšan naslov:Atmos. chem. phys.
Založnik:European Geophysical Society, Copernicus GmbH
ISSN:1680-7324
COBISS.SI-ID:1959012 Novo okno

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:14.06.2024

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