An assessment of the spatial extent of polar dust using satellite thermal data

Abstract The effect of mineral dust aerosols and subsequent deposition in polar regions has historically been underestimated in climate models. Dust aerosols increase melt rates by reducing surface albedo and modifying atmospheric radiative properties. In this study 127,413 satellite images covering...

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Autores principales:	M. Bowen, R. F. Vincent
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e053d6592db0495a95cbe112ca61a750
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spelling	oai:doaj.org-article:e053d6592db0495a95cbe112ca61a7502021-12-02T14:12:48ZAn assessment of the spatial extent of polar dust using satellite thermal data10.1038/s41598-020-79825-72045-2322https://doaj.org/article/e053d6592db0495a95cbe112ca61a7502021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79825-7https://doaj.org/toc/2045-2322Abstract The effect of mineral dust aerosols and subsequent deposition in polar regions has historically been underestimated in climate models. Dust aerosols increase melt rates by reducing surface albedo and modifying atmospheric radiative properties. In this study 127,413 satellite images covering the Arctic and Antarctic from 2007 to 2019 were assessed for dust content using thermal infrared wavelengths. The results show a strong linear trend in which the relative spatial extent of dust (RSED) increased annually by 0.31% in the Arctic (8.5% to 12.1%) and 0.19% in the Antarctic (5.2% to 7.5%). Seasonally, the maximum aggregated average RSED occurred in the Arctic during boreal winter (11.2%), while the Antarctic peaked in austral spring (9.5%). Maximum RSED rates occurred in boreal winter/austral summer (Dec–Jan–Feb) for both polar regions. The data suggests that finer dust particles are more efficiently distributed by aeolian processes leading to higher RSED values that are not necessarily reflective of polar dust loading models.M. BowenR. F. VincentNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Bowen R. F. Vincent An assessment of the spatial extent of polar dust using satellite thermal data
description	Abstract The effect of mineral dust aerosols and subsequent deposition in polar regions has historically been underestimated in climate models. Dust aerosols increase melt rates by reducing surface albedo and modifying atmospheric radiative properties. In this study 127,413 satellite images covering the Arctic and Antarctic from 2007 to 2019 were assessed for dust content using thermal infrared wavelengths. The results show a strong linear trend in which the relative spatial extent of dust (RSED) increased annually by 0.31% in the Arctic (8.5% to 12.1%) and 0.19% in the Antarctic (5.2% to 7.5%). Seasonally, the maximum aggregated average RSED occurred in the Arctic during boreal winter (11.2%), while the Antarctic peaked in austral spring (9.5%). Maximum RSED rates occurred in boreal winter/austral summer (Dec–Jan–Feb) for both polar regions. The data suggests that finer dust particles are more efficiently distributed by aeolian processes leading to higher RSED values that are not necessarily reflective of polar dust loading models.
format	article
author	M. Bowen R. F. Vincent
author_facet	M. Bowen R. F. Vincent
author_sort	M. Bowen
title	An assessment of the spatial extent of polar dust using satellite thermal data
title_short	An assessment of the spatial extent of polar dust using satellite thermal data
title_full	An assessment of the spatial extent of polar dust using satellite thermal data
title_fullStr	An assessment of the spatial extent of polar dust using satellite thermal data
title_full_unstemmed	An assessment of the spatial extent of polar dust using satellite thermal data
title_sort	assessment of the spatial extent of polar dust using satellite thermal data
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e053d6592db0495a95cbe112ca61a750
work_keys_str_mv	AT mbowen anassessmentofthespatialextentofpolardustusingsatellitethermaldata AT rfvincent anassessmentofthespatialextentofpolardustusingsatellitethermaldata AT mbowen assessmentofthespatialextentofpolardustusingsatellitethermaldata AT rfvincent assessmentofthespatialextentofpolardustusingsatellitethermaldata
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An assessment of the spatial extent of polar dust using satellite thermal data

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