Saharan dust and giant quartz particle transport towards Iceland

Abstract Mineral dust emissions from Saharan sources have an impact on the atmospheric environment and sedimentary units in distant regions. Here, we present the first systematic observations of long-range Saharan dust transport towards Iceland. Fifteen Saharan dust episodes were identified to have...

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Autores principales:	György Varga, Pavla Dagsson-Walhauserová, Fruzsina Gresina, Agusta Helgadottir
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/95a781a768fe4dc0aa9f614c5f6820c0
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id	oai:doaj.org-article:95a781a768fe4dc0aa9f614c5f6820c0
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spelling	oai:doaj.org-article:95a781a768fe4dc0aa9f614c5f6820c02021-12-02T18:25:04ZSaharan dust and giant quartz particle transport towards Iceland10.1038/s41598-021-91481-z2045-2322https://doaj.org/article/95a781a768fe4dc0aa9f614c5f6820c02021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91481-zhttps://doaj.org/toc/2045-2322Abstract Mineral dust emissions from Saharan sources have an impact on the atmospheric environment and sedimentary units in distant regions. Here, we present the first systematic observations of long-range Saharan dust transport towards Iceland. Fifteen Saharan dust episodes were identified to have occurred between 2008 and 2020 based on aerosol optical depth data, backward trajectories and numerical models. Icelandic samples from the local dust sources were compared with deposited dust from two severe Saharan dust events in terms of their granulometric and mineralogical characteristics. The episodes were associated with enhanced meridional atmospheric flow patterns driven by unusual meandering jets. Strong winds were able to carry large Saharan quartz particles (> 100 µm) towards Iceland. Our results confirm the atmospheric pathways of Saharan dust towards the Arctic, and identify new northward meridional long-ranged transport of giant dust particles from the Sahara, including the first evidence of their deposition in Iceland as previously predicted by models.György VargaPavla Dagsson-WalhauserováFruzsina GresinaAgusta HelgadottirNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q György Varga Pavla Dagsson-Walhauserová Fruzsina Gresina Agusta Helgadottir Saharan dust and giant quartz particle transport towards Iceland
description	Abstract Mineral dust emissions from Saharan sources have an impact on the atmospheric environment and sedimentary units in distant regions. Here, we present the first systematic observations of long-range Saharan dust transport towards Iceland. Fifteen Saharan dust episodes were identified to have occurred between 2008 and 2020 based on aerosol optical depth data, backward trajectories and numerical models. Icelandic samples from the local dust sources were compared with deposited dust from two severe Saharan dust events in terms of their granulometric and mineralogical characteristics. The episodes were associated with enhanced meridional atmospheric flow patterns driven by unusual meandering jets. Strong winds were able to carry large Saharan quartz particles (> 100 µm) towards Iceland. Our results confirm the atmospheric pathways of Saharan dust towards the Arctic, and identify new northward meridional long-ranged transport of giant dust particles from the Sahara, including the first evidence of their deposition in Iceland as previously predicted by models.
format	article
author	György Varga Pavla Dagsson-Walhauserová Fruzsina Gresina Agusta Helgadottir
author_facet	György Varga Pavla Dagsson-Walhauserová Fruzsina Gresina Agusta Helgadottir
author_sort	György Varga
title	Saharan dust and giant quartz particle transport towards Iceland
title_short	Saharan dust and giant quartz particle transport towards Iceland
title_full	Saharan dust and giant quartz particle transport towards Iceland
title_fullStr	Saharan dust and giant quartz particle transport towards Iceland
title_full_unstemmed	Saharan dust and giant quartz particle transport towards Iceland
title_sort	saharan dust and giant quartz particle transport towards iceland
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/95a781a768fe4dc0aa9f614c5f6820c0
work_keys_str_mv	AT gyorgyvarga saharandustandgiantquartzparticletransporttowardsiceland AT pavladagssonwalhauserova saharandustandgiantquartzparticletransporttowardsiceland AT fruzsinagresina saharandustandgiantquartzparticletransporttowardsiceland AT agustahelgadottir saharandustandgiantquartzparticletransporttowardsiceland
_version_	1718378052852908032

Saharan dust and giant quartz particle transport towards Iceland

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