Light scattering from micrometric mineral dust and aggregate particles : effects of structure and shape applied to paleoclimate studies /

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Bibliographic Details
Author / Creator:Cremonesi, Llorenç.
Imprint:Cham : Springer, 2020.
Description:1 online resource
Language:English
Series:Springer theses
Springer theses.
Subject:
Format: E-Resource Book
URL for this record:http://pi.lib.uchicago.edu/1001/cat/bib/12607924
Hidden Bibliographic Details
ISBN:9783030567873
3030567877
3030567869
9783030567866
Digital file characteristics:text file PDF
Notes:"Doctoral thesis accepted by University of Milan, Milan, Italy."
Includes bibliographical references.
Online resource; title from PDF title page (SpringerLink, viewed November 19, 2020).
Summary:Light scattering from particles in the nanometric and micrometric size range is relevant in several research fields, such as aerosol science and nanotechnology. In many applications, the description of the optical properties of non-spherical, inhomogeneous particles is still inadequate or requires demanding numerical calculations. Lorenz-Mie scattering and effective medium approximations represent currently the main theoretical tools to model such particles, but their effectiveness has been recently called into question. This work examines how the morphology of a particle affects its scattering parameters from an experimental standpoint, supporting findings with extensive simulations. The dust content of Antarctic, Greenlandic, and Alpine ice cores is analysed with a particle-by-particle approach. Moreover, a study on colloidal aggregates shows that correlations among the fields radiated by primary particles are responsible for the poor agreement of effective medium approximations with experimental results. On the theoretical side, an interpretation in terms of the structure factor is given, which satisfactorily describes the data. The insights of this thesis are relevant for quantifying the contribution of mineral dust to the radiative energy balance of the Earth.
Other form:Original 3030567869 9783030567866
Standard no.:10.1007/978-3-030-56
10.1007/978-3-030-56787-3.

MARC

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505 0 |a Introduction -- Scattering Fundamentals -- Scattering Models -- Mineral Dust -- Fractal Aggregates -- Conclusions. 
520 |a Light scattering from particles in the nanometric and micrometric size range is relevant in several research fields, such as aerosol science and nanotechnology. In many applications, the description of the optical properties of non-spherical, inhomogeneous particles is still inadequate or requires demanding numerical calculations. Lorenz-Mie scattering and effective medium approximations represent currently the main theoretical tools to model such particles, but their effectiveness has been recently called into question. This work examines how the morphology of a particle affects its scattering parameters from an experimental standpoint, supporting findings with extensive simulations. The dust content of Antarctic, Greenlandic, and Alpine ice cores is analysed with a particle-by-particle approach. Moreover, a study on colloidal aggregates shows that correlations among the fields radiated by primary particles are responsible for the poor agreement of effective medium approximations with experimental results. On the theoretical side, an interpretation in terms of the structure factor is given, which satisfactorily describes the data. The insights of this thesis are relevant for quantifying the contribution of mineral dust to the radiative energy balance of the Earth. 
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