Probing the morphology of dust particles in deep ice cores with light scattering
The size distribution and light extinction cross-section of airborne particles are among the climate proxies investigated in palaeoclimate research and required by radiative transfer models. The optical properties of the particles are acquired by a non-invasive, single-particle light scattering tech...
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Società italiana fisica
2021
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ftunivmilanoair:oai:air.unimi.it:2434/864599 2023-06-11T04:12:40+02:00 Probing the morphology of dust particles in deep ice cores with light scattering Llorenç Cremonesi C. Llorenç 2021-07-19 http://hdl.handle.net/2434/864599 https://doi.org/10.1393/ncc/i2021-21015-8 eng eng Società italiana fisica info:eu-repo/semantics/altIdentifier/wos/WOS:000694009700016 Congresso Nazionale Società Italiana di Fisica volume:44 issue:1 firstpage:1 lastpage:10 numberofpages:10 journal:NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. C, GEOPHYSICS AND SPACE PHYSICS http://hdl.handle.net/2434/864599 doi:10.1393/ncc/i2021-21015-8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85105912996 info:eu-repo/semantics/openAccess Settore FIS/03 - Fisica della Materia Settore GEO/04 - Geografia Fisica e Geomorfologia info:eu-repo/semantics/article 2021 ftunivmilanoair https://doi.org/10.1393/ncc/i2021-21015-8 2023-05-02T23:22:03Z The size distribution and light extinction cross-section of airborne particles are among the climate proxies investigated in palaeoclimate research and required by radiative transfer models. The optical properties of the particles are acquired by a non-invasive, single-particle light scattering technique to characterise aeolian dust stored in deep polar ice core samples. The same method is applied to study alpine ice cores and firn cores. The particle-by-particle approach provides a comprehensive statistical analysis while overcoming the limitations imposed by low concentrations (similar to 10(1)-10(3) ng/g). From a geometrical standpoint, dust particles deviate significantly from homogeneous spheres, as expected by many studies on mineral dust sources and ice core analysis. Features such as shape and structure prove to have greater importance than the particle refractive index in determining their radiative properties. By comparing experimental data to computationally inexpensive simulations, the main morphological properties of the particles can be inferred, such as the ratio between the axes in prolate particles and the porosity in isometric aggregate particles. Article in Journal/Newspaper ice core The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
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Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
Settore FIS/03 - Fisica della Materia Settore GEO/04 - Geografia Fisica e Geomorfologia |
spellingShingle |
Settore FIS/03 - Fisica della Materia Settore GEO/04 - Geografia Fisica e Geomorfologia Llorenç Cremonesi Probing the morphology of dust particles in deep ice cores with light scattering |
topic_facet |
Settore FIS/03 - Fisica della Materia Settore GEO/04 - Geografia Fisica e Geomorfologia |
description |
The size distribution and light extinction cross-section of airborne particles are among the climate proxies investigated in palaeoclimate research and required by radiative transfer models. The optical properties of the particles are acquired by a non-invasive, single-particle light scattering technique to characterise aeolian dust stored in deep polar ice core samples. The same method is applied to study alpine ice cores and firn cores. The particle-by-particle approach provides a comprehensive statistical analysis while overcoming the limitations imposed by low concentrations (similar to 10(1)-10(3) ng/g). From a geometrical standpoint, dust particles deviate significantly from homogeneous spheres, as expected by many studies on mineral dust sources and ice core analysis. Features such as shape and structure prove to have greater importance than the particle refractive index in determining their radiative properties. By comparing experimental data to computationally inexpensive simulations, the main morphological properties of the particles can be inferred, such as the ratio between the axes in prolate particles and the porosity in isometric aggregate particles. |
author2 |
C. Llorenç |
format |
Article in Journal/Newspaper |
author |
Llorenç Cremonesi |
author_facet |
Llorenç Cremonesi |
author_sort |
Llorenç Cremonesi |
title |
Probing the morphology of dust particles in deep ice cores with light scattering |
title_short |
Probing the morphology of dust particles in deep ice cores with light scattering |
title_full |
Probing the morphology of dust particles in deep ice cores with light scattering |
title_fullStr |
Probing the morphology of dust particles in deep ice cores with light scattering |
title_full_unstemmed |
Probing the morphology of dust particles in deep ice cores with light scattering |
title_sort |
probing the morphology of dust particles in deep ice cores with light scattering |
publisher |
Società italiana fisica |
publishDate |
2021 |
url |
http://hdl.handle.net/2434/864599 https://doi.org/10.1393/ncc/i2021-21015-8 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000694009700016 Congresso Nazionale Società Italiana di Fisica volume:44 issue:1 firstpage:1 lastpage:10 numberofpages:10 journal:NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. C, GEOPHYSICS AND SPACE PHYSICS http://hdl.handle.net/2434/864599 doi:10.1393/ncc/i2021-21015-8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85105912996 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1393/ncc/i2021-21015-8 |
_version_ |
1768388675806167040 |