Field observations of the variability of dust emission, its size-spectrum and mineralogy
Tipus de documentText en actes de congrés
Data publicació2020-05
EditorBarcelona Supercomputing Center
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
Atmospheric mineral dust consists of tiny mineral particles
that are produced by the wind erosion of arid and semi-arid
surfaces of the Earth, and it is one of the most important
aerosols in terms of mass in the global atmosphere [1].
The physical and chemical properties of dust, that is, its
particle size distribution (PSD), mineralogical composition,
shape and mixing state determine its impact on the Earth’s
system. Dust mineralogy in particular has been identified by
the Intergovernmental Panel on Climate Change (IPCC) as a
key uncertainty in the overall contribution of aerosols to
radiative forcing [2] and many studies over recent years have
shown its potential importance [3,4].
Despite this, Earth System models typically assume dust
aerosols to have a globally uniform composition, neglecting
the known local and regional variations in the mineralogical
composition of the sources [5,6] and therefore, preventing
further understanding of the role of dust in the Earth system.
However, this simplification is justified by the current
incomplete understanding of the physical processes at
emission, the lack of coincident measurements of individual
mineral PSDs for emitted dust and the parent soil, the
fundamental disagreements among existing dust emission
schemes on multiple aspects, the limited global knowledge of
soil mineral content and the insufficient knowledge of the
mixing state of the minerals.
The ERC Consolidator Grant called FRAGMENT
(FRontiers in dust minerAloGical coMposition and its Effects
upoN climaTe) aims to address these limitations and to better
understand and constrain the global mineralogical
composition of dust along with its effects upon climate. This
ambitious and multidisciplinary project combines theory, field
measurements, laboratory analyses, remote spectroscopy and
modelling.
CitacióGonzález-Flórez, C.; Klose, M.; Pérez García-Pando, C. Field observations of the variability of dust emission, its size-spectrum and mineralogy. A: . Barcelona Supercomputing Center, 2020, p. 45-46.
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
BSC_SODS-20-17_ ... ons of the variability.pdf | 355,4Kb | Visualitza/Obre | ||
license_rdf.rdf | 1,203Kb | application/rdf+xml; charset=utf-8 | Visualitza/Obre |