Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography
We describe an optical approach based on Digital Holography for single-particle characterization of mineral dust and micrometric particles, focusing on the analysis of airborne particles in meltwater from Antarctic ice cores. We record the holograms formed by the superposition of the transilluminati...
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Online Access: | http://hdl.handle.net/2434/891851 https://doi.org/10.1021/acsearthspacechem.1c00224 |
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ftunivmilanoair:oai:air.unimi.it:2434/891851 2024-02-11T09:58:39+01:00 Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography Ravasio C. Cremonesi L. Artoni C. Delmonte B. Maggi V. Potenza M. A. C. C. Ravasio L. Cremonesi C. Artoni B. Delmonte V. Maggi M.A.C. Potenza 2021-10-21 http://hdl.handle.net/2434/891851 https://doi.org/10.1021/acsearthspacechem.1c00224 eng eng American Chemical Society info:eu-repo/semantics/altIdentifier/wos/WOS:000714116400028 volume:5 issue:10 firstpage:2855 lastpage:2864 numberofpages:10 journal:ACS EARTH AND SPACE CHEMISTRY http://hdl.handle.net/2434/891851 doi:10.1021/acsearthspacechem.1c00224 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85115240951 info:eu-repo/semantics/openAccess Aerosol Digital Holography Ice core Mineral dust Optical properties Settore FIS/03 - Fisica della Materia info:eu-repo/semantics/article 2021 ftunivmilanoair https://doi.org/10.1021/acsearthspacechem.1c00224 2024-01-16T23:34:56Z We describe an optical approach based on Digital Holography for single-particle characterization of mineral dust and micrometric particles, focusing on the analysis of airborne particles in meltwater from Antarctic ice cores. We record the holograms formed by the superposition of the transilluminating reference beam and the waves scattered by single particles. Taking a cue from recent approaches in the field and holography methods, we process the holograms to recover both optical and morphological properties of single dust grains. As a considerable advantage over traditional light-scattering-based methods, holograms give the extinction cross section of each particle and, by numerically reconstructing the wavefront propagation, an unambiguous image of each particle whereby we derive its cross-sectional shape and size. Measurements have been carried out on samples collected from the recent EAIIST (East Antarctic International Ice Sheet Traverse) project, some of which show evidence of volcanic events. The vast majority of the detected particles show significant deviations from the isometric shape, as confirmed by both image reconstruction and extinction cross section analysis. By our analysis, we observe that experimental data have an extinction cross section up to 3 times lower than that of spherical particles with the same volume. Therefore, these deviations have an appreciable impact on the aerosol contribution to radiative forcing: retrieving particle shape may improve the modeling of the radiative properties of mineral dust and reduce the associated uncertainties. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet The University of Milan: Archivio Istituzionale della Ricerca (AIR) Antarctic ACS Earth and Space Chemistry 5 10 2855 2864 |
institution |
Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
Aerosol Digital Holography Ice core Mineral dust Optical properties Settore FIS/03 - Fisica della Materia |
spellingShingle |
Aerosol Digital Holography Ice core Mineral dust Optical properties Settore FIS/03 - Fisica della Materia Ravasio C. Cremonesi L. Artoni C. Delmonte B. Maggi V. Potenza M. A. C. Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography |
topic_facet |
Aerosol Digital Holography Ice core Mineral dust Optical properties Settore FIS/03 - Fisica della Materia |
description |
We describe an optical approach based on Digital Holography for single-particle characterization of mineral dust and micrometric particles, focusing on the analysis of airborne particles in meltwater from Antarctic ice cores. We record the holograms formed by the superposition of the transilluminating reference beam and the waves scattered by single particles. Taking a cue from recent approaches in the field and holography methods, we process the holograms to recover both optical and morphological properties of single dust grains. As a considerable advantage over traditional light-scattering-based methods, holograms give the extinction cross section of each particle and, by numerically reconstructing the wavefront propagation, an unambiguous image of each particle whereby we derive its cross-sectional shape and size. Measurements have been carried out on samples collected from the recent EAIIST (East Antarctic International Ice Sheet Traverse) project, some of which show evidence of volcanic events. The vast majority of the detected particles show significant deviations from the isometric shape, as confirmed by both image reconstruction and extinction cross section analysis. By our analysis, we observe that experimental data have an extinction cross section up to 3 times lower than that of spherical particles with the same volume. Therefore, these deviations have an appreciable impact on the aerosol contribution to radiative forcing: retrieving particle shape may improve the modeling of the radiative properties of mineral dust and reduce the associated uncertainties. |
author2 |
C. Ravasio L. Cremonesi C. Artoni B. Delmonte V. Maggi M.A.C. Potenza |
format |
Article in Journal/Newspaper |
author |
Ravasio C. Cremonesi L. Artoni C. Delmonte B. Maggi V. Potenza M. A. C. |
author_facet |
Ravasio C. Cremonesi L. Artoni C. Delmonte B. Maggi V. Potenza M. A. C. |
author_sort |
Ravasio C. |
title |
Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography |
title_short |
Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography |
title_full |
Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography |
title_fullStr |
Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography |
title_full_unstemmed |
Optical Characterization of Mineral Dust from the EAIIST Project with Digital Holography |
title_sort |
optical characterization of mineral dust from the eaiist project with digital holography |
publisher |
American Chemical Society |
publishDate |
2021 |
url |
http://hdl.handle.net/2434/891851 https://doi.org/10.1021/acsearthspacechem.1c00224 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core Ice Sheet |
genre_facet |
Antarc* Antarctic ice core Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000714116400028 volume:5 issue:10 firstpage:2855 lastpage:2864 numberofpages:10 journal:ACS EARTH AND SPACE CHEMISTRY http://hdl.handle.net/2434/891851 doi:10.1021/acsearthspacechem.1c00224 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85115240951 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1021/acsearthspacechem.1c00224 |
container_title |
ACS Earth and Space Chemistry |
container_volume |
5 |
container_issue |
10 |
container_start_page |
2855 |
op_container_end_page |
2864 |
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