Single-Particle Extinction and Scattering Method Allows for Detection and Characterization of Aggregates of Aeolian Dust Grains in Ice Cores
Articolo
Data di Pubblicazione:
2017
Citazione:
Single-Particle Extinction and Scattering Method Allows for Detection and Characterization of Aggregates of Aeolian Dust Grains in Ice Cores / M.A.C. Potenza, L. Cremonesi, B. Delmonte, T. Sanvito, B. Paroli, A. Pullia, G. Baccolo, V. Maggi. - In: ACS EARTH AND SPACE CHEMISTRY. - ISSN 2472-3452. - 1:5(2017 Jul), pp. 261-269. [10.1021/acsearthspacechem.7b00018]
Abstract:
Mineral dust aerosol in ice cores is one of the
most important proxies for paleoclimate research. Under certain
conditions, in the deeper part of ice cores, the pristine
paleoclimate signal can be altered by in situ formation of dust
aggregates, following the relocation of the impurities. Thus,
aggregate detection is a critical indication for post-depositional
processes. Clues for the presence of aggregates have been
provided by anomalously large dust size distributions, while
small aggregates were basically invisible to conventional dust
analysis techniques. In this paper, we propose an optical
approach to this problem based on the single-particle extinction
and scattering (SPES) method, which allows researchers to
distinguish between compact and non-compact particles
through the analysis of samples populated by isometric particles contained in the core samples. This method can potentially
be used during continuous flow analyses of ice cores. It allows for the detection of even the tiniest aggregates, falling within the
typical size interval of aeolian mineral aerosol. This approach will potentially provide key evidence for assessing the integrity of
paleoclimate records.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
dust; optical properties; ice core analysis; aggregates; light scattering
Elenco autori:
M.A.C. Potenza, L. Cremonesi, B. Delmonte, T. Sanvito, B. Paroli, A. Pullia, G. Baccolo, V. Maggi
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