Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols

Abstract Anthropogenic iron oxide aerosols (FeOx) have been identified as a climatically significant atmospheric light absorber, and as a contributor of free iron to the oceans. Here we provide global-scale constraints on their atmospheric abundance with measurements over the remote Pacific and Atla...

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Autores principales:	K. D. Lamb, H. Matsui, J. M. Katich, A. E. Perring, J. R. Spackman, B. Weinzierl, M. Dollner, J. P. Schwarz
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/82ca664075ce4023b227cc0d1a038d43
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spelling	oai:doaj.org-article:82ca664075ce4023b227cc0d1a038d432021-12-02T11:36:35ZGlobal-scale constraints on light-absorbing anthropogenic iron oxide aerosols10.1038/s41612-021-00171-02397-3722https://doaj.org/article/82ca664075ce4023b227cc0d1a038d432021-03-01T00:00:00Zhttps://doi.org/10.1038/s41612-021-00171-0https://doaj.org/toc/2397-3722Abstract Anthropogenic iron oxide aerosols (FeOx) have been identified as a climatically significant atmospheric light absorber, and as a contributor of free iron to the oceans. Here we provide global-scale constraints on their atmospheric abundance with measurements over the remote Pacific and Atlantic Oceans from aircraft campaigns spanning 10 years. We find FeOx-like aerosols are transported far from source regions with similar efficiency as black carbon particles. Strong contrast in concentrations was observed between the Northern and Southern Hemisphere Pacific. We provide observational constraints in remote regions on the ambient ratios of FeOx relative to BC from fossil fuel burning. Comparison with a global aerosol model tuned to recent observations in East-Asian source regions confirm an upward revision of emissions based on model/observation comparison over the Pacific receptor region. We find that anthropogenic FeOx-like particles generate global-scale shortwave atmospheric heating 0.3–26% of that of black carbon in remote regions where concentrations of both aerosols are very low.K. D. LambH. MatsuiJ. M. KatichA. E. PerringJ. R. SpackmanB. WeinzierlM. DollnerJ. P. SchwarzNature PortfolioarticleEnvironmental sciencesGE1-350Meteorology. ClimatologyQC851-999ENnpj Climate and Atmospheric Science, Vol 4, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
spellingShingle	Environmental sciences GE1-350 Meteorology. Climatology QC851-999 K. D. Lamb H. Matsui J. M. Katich A. E. Perring J. R. Spackman B. Weinzierl M. Dollner J. P. Schwarz Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
description	Abstract Anthropogenic iron oxide aerosols (FeOx) have been identified as a climatically significant atmospheric light absorber, and as a contributor of free iron to the oceans. Here we provide global-scale constraints on their atmospheric abundance with measurements over the remote Pacific and Atlantic Oceans from aircraft campaigns spanning 10 years. We find FeOx-like aerosols are transported far from source regions with similar efficiency as black carbon particles. Strong contrast in concentrations was observed between the Northern and Southern Hemisphere Pacific. We provide observational constraints in remote regions on the ambient ratios of FeOx relative to BC from fossil fuel burning. Comparison with a global aerosol model tuned to recent observations in East-Asian source regions confirm an upward revision of emissions based on model/observation comparison over the Pacific receptor region. We find that anthropogenic FeOx-like particles generate global-scale shortwave atmospheric heating 0.3–26% of that of black carbon in remote regions where concentrations of both aerosols are very low.
format	article
author	K. D. Lamb H. Matsui J. M. Katich A. E. Perring J. R. Spackman B. Weinzierl M. Dollner J. P. Schwarz
author_facet	K. D. Lamb H. Matsui J. M. Katich A. E. Perring J. R. Spackman B. Weinzierl M. Dollner J. P. Schwarz
author_sort	K. D. Lamb
title	Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
title_short	Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
title_full	Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
title_fullStr	Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
title_full_unstemmed	Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
title_sort	global-scale constraints on light-absorbing anthropogenic iron oxide aerosols
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/82ca664075ce4023b227cc0d1a038d43
work_keys_str_mv	AT kdlamb globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT hmatsui globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT jmkatich globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT aeperring globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT jrspackman globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT bweinzierl globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT mdollner globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols AT jpschwarz globalscaleconstraintsonlightabsorbinganthropogenicironoxideaerosols
_version_	1718395770298695680

Global-scale constraints on light-absorbing anthropogenic iron oxide aerosols

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