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Vertical distribution of aerosols in dust storms during the Arctic winter

Vertical distribution of aerosols in dust storms during the Arctic winter

Title: Vertical distribution of aerosols in dust storms during the Arctic winter
Author: Dagsson-Waldhauserova, Pavla   orcid.org/0000-0001-6368-2369
renard, jean-baptiste   orcid.org/0000-0003-2072-6952
Olafsson, Haraldur   orcid.org/0000-0002-4181-0988
VIGNELLES, Damien   orcid.org/0000-0003-3373-5997
Berthet, Gwenael   orcid.org/0000-0003-3169-1636
Verdier, Nicolas
Duverger, Vincent
Date: 2019-11-06
Language: English
Scope: 1-11
University/Institute: Landbúnaðarháskóli Íslands
Agricultural University of Iceland
Department: Auðlinda- og umhverfisdeild (LBHÍ)
Faculty of Natural Resources and Environmental Sciences (AUI)
Series: Scientific Reports;9(1)
ISSN: 2045-2322
DOI: 10.1038/s41598-019-51764-y
Subject: Dust storms; Air pollution; Aerosols; Svifryk; Andrúmsloft; Loftmengun
URI: https://hdl.handle.net/20.500.11815/1345

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Dagsson-Waldhauserova, P., Renard, J. B., Olafsson, H., Vignelles, D., Berthet, G., Verdier, N., & Duverger, V. (2019). Vertical distribution of aerosols in dust storms during the Arctic winter. Scientific reports, 9(1), 1-11.


High Latitude Dust (HLD) contributes 5% to the global dust budget, but HLD measurements are sparse. Dust observations from Iceland provide dust aerosol distributions during the Arctic winter for the first time, profiling dust storms as well as clean air conditions. Five winter dust storms were captured during harsh conditions. Mean number concentrations during the non-dust flights were <5 particles cm−3 for the particles 0.2–100 µm in diameter and >40 particles cm−3 during dust storms. A moderate dust storm with >250 particles cm−3 (2 km altitude) was captured on 10th January 2016 as a result of sediments suspended from glacial outburst flood Skaftahlaup in 2015. Similar concentrations were reported previously in the Saharan air layer. Detected particle sizes were up to 20 µm close to the surface, up to 10 µm at 900 m altitude, up to 5 µm at 5 km altitude, and submicron at altitudes >6 km. Dust sources in the Arctic are active during the winter and produce large amounts of particulate matter dispersed over long distances and high altitudes. HLD contributes to Arctic air pollution and has the potential to influence ice nucleation in mixed-phase clouds and Arctic amplification.


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