Dust deposition from air with anomalous characteristics

Research output: Contribution to journalArticle

Abstract

A singular event related with the fall of a considerable amount of dust with anomalous characteristics is reported here, as well as the physicochemical characteristics of samples collected at the site in Lisbon—Portugal. The dust fall occurred during a rainy autumnal overnight and the geographic delimitation of the affected area, as well as the physical state in situ of the powder samples, are not compatible with the one that would be expected considering the climatic conditions registered at that time. The collected samples have been investigated, particularly by modern techniques involving nanoparticle analysis. The results prove that the samples have a very heterogeneous and granulated composition whose nanoparticle size distribution is bimodal (centered, respectively, about 90 and 120 nm) and containing some nanowhiskers and nanorods. Taking into account the official meteo data, it is likely that dust must have been transported by air and dried in the place (after rain) by unusual extremely localized-heat wave. However, the back trajectories software simulations point to a geographic source of clouds which soil chemical composition has no correlation with the chemical composition of the sample and where no industrial-relevant source is assigned.

Original languageEnglish
Pages (from-to)623-633
Number of pages11
JournalRendiconti Lincei
Volume28
Issue number4
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

Dust
dust
Air
air
Nanoparticles
chemical composition
Infrared Rays
Nanotubes
nanoparticles
Rain
nanorods
sampling
Powders
Soil
Software
trajectory
software
trajectories
powders
simulation

Keywords

  • Atmospheric dust
  • Dust precipitation
  • Localized-heat wave
  • Nanophysics
  • Ultrafine particles

Cite this

@article{c84a736c6a1f454e9d0e8b7e4e3f033c,
title = "Dust deposition from air with anomalous characteristics",
abstract = "A singular event related with the fall of a considerable amount of dust with anomalous characteristics is reported here, as well as the physicochemical characteristics of samples collected at the site in Lisbon—Portugal. The dust fall occurred during a rainy autumnal overnight and the geographic delimitation of the affected area, as well as the physical state in situ of the powder samples, are not compatible with the one that would be expected considering the climatic conditions registered at that time. The collected samples have been investigated, particularly by modern techniques involving nanoparticle analysis. The results prove that the samples have a very heterogeneous and granulated composition whose nanoparticle size distribution is bimodal (centered, respectively, about 90 and 120 nm) and containing some nanowhiskers and nanorods. Taking into account the official meteo data, it is likely that dust must have been transported by air and dried in the place (after rain) by unusual extremely localized-heat wave. However, the back trajectories software simulations point to a geographic source of clouds which soil chemical composition has no correlation with the chemical composition of the sample and where no industrial-relevant source is assigned.",
keywords = "Atmospheric dust, Dust precipitation, Localized-heat wave, Nanophysics, Ultrafine particles",
author = "Lobo, {Rui F.M.}",
year = "2017",
month = "12",
day = "1",
doi = "10.1007/s12210-017-0633-z",
language = "English",
volume = "28",
pages = "623--633",
journal = "Rendiconti Lincei-Scienze Fisiche e Naturali",
issn = "2037-4631",
publisher = "Springer Verlag",
number = "4",

}

Dust deposition from air with anomalous characteristics. / Lobo, Rui F.M.

In: Rendiconti Lincei, Vol. 28, No. 4, 01.12.2017, p. 623-633.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dust deposition from air with anomalous characteristics

AU - Lobo, Rui F.M.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - A singular event related with the fall of a considerable amount of dust with anomalous characteristics is reported here, as well as the physicochemical characteristics of samples collected at the site in Lisbon—Portugal. The dust fall occurred during a rainy autumnal overnight and the geographic delimitation of the affected area, as well as the physical state in situ of the powder samples, are not compatible with the one that would be expected considering the climatic conditions registered at that time. The collected samples have been investigated, particularly by modern techniques involving nanoparticle analysis. The results prove that the samples have a very heterogeneous and granulated composition whose nanoparticle size distribution is bimodal (centered, respectively, about 90 and 120 nm) and containing some nanowhiskers and nanorods. Taking into account the official meteo data, it is likely that dust must have been transported by air and dried in the place (after rain) by unusual extremely localized-heat wave. However, the back trajectories software simulations point to a geographic source of clouds which soil chemical composition has no correlation with the chemical composition of the sample and where no industrial-relevant source is assigned.

AB - A singular event related with the fall of a considerable amount of dust with anomalous characteristics is reported here, as well as the physicochemical characteristics of samples collected at the site in Lisbon—Portugal. The dust fall occurred during a rainy autumnal overnight and the geographic delimitation of the affected area, as well as the physical state in situ of the powder samples, are not compatible with the one that would be expected considering the climatic conditions registered at that time. The collected samples have been investigated, particularly by modern techniques involving nanoparticle analysis. The results prove that the samples have a very heterogeneous and granulated composition whose nanoparticle size distribution is bimodal (centered, respectively, about 90 and 120 nm) and containing some nanowhiskers and nanorods. Taking into account the official meteo data, it is likely that dust must have been transported by air and dried in the place (after rain) by unusual extremely localized-heat wave. However, the back trajectories software simulations point to a geographic source of clouds which soil chemical composition has no correlation with the chemical composition of the sample and where no industrial-relevant source is assigned.

KW - Atmospheric dust

KW - Dust precipitation

KW - Localized-heat wave

KW - Nanophysics

KW - Ultrafine particles

UR - http://www.scopus.com/inward/record.url?scp=85027352862&partnerID=8YFLogxK

U2 - 10.1007/s12210-017-0633-z

DO - 10.1007/s12210-017-0633-z

M3 - Article

VL - 28

SP - 623

EP - 633

JO - Rendiconti Lincei-Scienze Fisiche e Naturali

JF - Rendiconti Lincei-Scienze Fisiche e Naturali

SN - 2037-4631

IS - 4

ER -