Recent progress in understanding physical and chemical properties of African and Asian mineral dust 1Laboratoire Interuniversitaire des Systémes Atmosphériques (LISA), UMR7583, Université Paris Est Créteil et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
15 Aug 2011
2Institut für Physik der Atmosphäre, Johannes-Gutenberg-Universität, Mainz, Germany
3Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA-CNRS-UVSQ, Institut Pierre Simon Laplace, L'Orme des Merisiers, France
4Institut für Angewandte Geowissenschaften, Technische Universität Darmstadt, Darmstadt, Germany
5Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre Oberpfaffenhofen, Wessling, Germany
6Prefectural University of Kumamoto, Kumamoto, Japan
Received: 08 November 2010 – Published in Atmos. Chem. Phys. Discuss.: 22 December 2010 Abstract. This paper presents a review of recently acquired knowledge on the
physico-chemical properties of mineral dust from Africa and Asia based on
data presented and discussed during the Third International Dust Workshop,
held in Leipzig (Germany) in September 2008.
Revised: 03 August 2011 – Accepted: 04 August 2011 – Published: 15 August 2011
Various regional field experiments have been conducted in the last few
years, mostly close to source regions or after short-range transport.
Although significant progress has been made in characterising the regional
variability of dust properties close to source regions, in particular the
mineralogy of iron and the description of particle shape and mixing state,
difficulties remain in estimating the range of variability of those
properties within one given source region. As consequence, the impact of
these parameters on aerosol properties like optical properties, solubility,
hygroscopicity, etc. – determining the dust impact on climate – is only
partly understood. Long-term datasets in remote regions such as the dust
source regions remain a major desideratum.
Future work should also focus on the evolution of dust properties during
transport. In particular, the prediction of the mineral dust size
distribution at emission and their evolution during transport should be
considered as a high-priority.
From the methodological point of view, a critical assessment and
standardisation of the experimental and analytical techniques is highly
recommended. Techniques to characterize the internal state of mixing of dust
particles, particularly with organic material, should be further developed.
Citation: Formenti, P., Schütz, L., Balkanski, Y., Desboeufs, K., Ebert, M., Kandler, K., Petzold, A., Scheuvens, D., Weinbruch, S., and Zhang, D.: Recent progress in understanding physical and chemical properties of African and Asian mineral dust, Atmos. Chem. Phys., 11, 8231-8256, doi:10.5194/acp-11-8231-2011, 2011.