Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111707
Title: Light Scattering from Volcanic-Sand Particles in Deposited and Aerosol Form
Authors: Zubko, N.
Muñoz, O.
Zubko, E.
Gritsevich, M.
Escobar-Cerezo, J.
Berg, M. J.
Peltoniemi, J.
Issue Date: 2019
Publisher: Elsevier Ltd
Elsevier BV
Citation: Light Scattering from Volcanic-Sand Particles in Deposited and Aerosol Form / N. Zubko, O. Muñoz, E. Zubko et al. // Atmospheric Environment. — 2019. — Vol. 215. — 116813.
Abstract: The light-scattering properties of volcanic sand collected in Iceland are studied here to characterize the sand particles and develop a reference for future remote-sensing observations. While such sand is common in Iceland, the smaller-size fraction can be readily transported by winds and found in the atmosphere at distant locations. The sand appears dark when deposited on a surface due to the high optical absorption of the material. Therefore, atmospheric regions containing such particles during a dust storm may absorb sunlight considerably, causing redistribution of solar energy. Here, we measure the angular scattered-light intensity and degree of linear polarization from the sand. This is done with two experimental apparatuses, the Cosmic Dust Laboratory (CoDuLab) at the Institute de Astrofísica de Andalucía (IAA) and the goniospectropolarimeter (FIGIFIGO) at the Finnish Geospatial Research Institute (FGI). Two scattering-scenarios of practical interest for remote-sensing applications are considered: (1) single sand-particles suspended in aerosol as an optically thin cloud, and (2) the same particles deposited on a substrate. We also model the measurements with the discrete dipole approximation to estimate the complex-valued refractive index m, where we find that m ≈ 1.6 + 0.01i at λ = 647 nm. Lastly, we present a comparative analysis of the polarimetric response of the sand particles with that reported in the literature for carbon-soot, another highly absorbing atmospheric contaminant. © 2019.
Keywords: AEROSOLS
DISCRETE DIPOLE APPROXIMATION
LIGHT SCATTERING
PARTICULATE SURFACE
PHOTOMETRY
POLARIMETRY
RADIOMETRY
REFRACTIVE INDEX
REMOTE SENSING
SOOT
VOLCANIC SAND
AEROSOLS
COSMOLOGY
DUST
LIGHT ABSORPTION
LIGHT SCATTERING
PARTICLE SIZE ANALYSIS
PHOTOMETRY
POLARIMETERS
RADIOMETRY
REFRACTIVE INDEX
REMOTE SENSING
SOLAR ENERGY
SOOT
STORMS
VOLCANOES
ATMOSPHERIC CONTAMINANTS
COMPARATIVE ANALYSIS
DEGREE OF LINEAR POLARIZATION
DISCRETE DIPOLE APPROXIMATION
EXPERIMENTAL APPARATUS
REMOTE SENSING APPLICATIONS
RESEARCH INSTITUTES
VOLCANIC SAND
SAND
CARBON
ABSORPTION
AEROSOL
DISCRETE ELEMENT METHOD
DUST STORM
LIGHT SCATTERING
PARTICULATE MATTER
PHOTOMETER
POLARIZATION
RADIOMETRIC METHOD
REFRACTIVE INDEX
REMOTE SENSING
SOOT
VOLCANIC ISLAND
ABSORPTION
ARTICLE
ASTRONOMY
ATMOSPHERIC DEPOSITION
ATMOSPHERIC TRANSPORT
ICELAND
LIGHT INTENSITY
LIGHT SCATTERING
PARTICLE SIZE
POLARIZATION
PRIORITY JOURNAL
REFRACTION INDEX
SAND
VOLCANO
WIND
URI: http://hdl.handle.net/10995/111707
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85071459229
PURE ID: 10769561
ISSN: 1352-2310
metadata.dc.description.sponsorship: This research was partially supported by the Academy of Finland Project no. 260027 and the COST Action MP1104 “Polarization as a tool to study the Solar System and beyond”. NZ acknowledges Magnus Ehrnrooth Foundation for the research travel support. This work also has been partially supported by contracts AYA2015-67152-R and RTI2018-095330-B-I00 . We thank P. Dagsson Waldhauserová, O. Arnalds, A. Virkkula, O. Meinander, and J. Svensson for their help obtaining the samples and for relevant discussions. We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Observing System Data and Information System (EOSDIS). We also would like to thank reviewers for their constructive reviews.
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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