Mineral dust variability in central West Antarctica associated with ozone depletion 1LARAMG, Universidade do Estado do Rio de Janeiro (Uerj), Pav. Haroldo L. Cunha/Subsolo, Rua São Francisco Xavier 524, Maracanã, 20550-013, Rio de Janeiro, RJ, Brazil
25 Feb 2013
2Centro Polar e Climático, Instituto de Geociências, UFRGS, Av. Bento Goncalves 9500, 91501-970, Porto Alegre, RS, Brazil
3Environmental Engineering Department, Federal University of Paraná (UFPR) 19011, 81531-990, Curitiba, PR, Brazil
4School of Earth Sciences, University of Melbourne, 3010, Victoria, Australia
5Instituto de Geociências, Universidade de São Paulo (USP), Rua do Lago 562, 05508-080, São Paulo, SP, Brazil
6Departamento de Oceanografia Física, IO, Universidade de São Paulo USP, Praça do Oceanográfico 191, 05508-120, São Paulo, SP, Brazil
7Micro and Trace Analysis Centre, Department of Chemistry, University of Antwerp, 2610, Antwerp, Belgium
Received: 17 Nov 2011 – Published in Atmos. Chem. Phys. Discuss.: 21 May 2012Abstract. We present here data of mineral dust variability retrieved from an ice core
of the central West Antarctic, spanning the last five decades. Main evidence
provided by the geochemical analysis is that northerly air mass incursions
to the coring site, tracked by insoluble dust microparticles, have declined
over the past 50 yr. This result contrasts with dust records from ice
cores reported to the coastal West Antarctic that show increases since
mid-20th century. We attribute this difference to regional climatic
changes due to the ozone depletion and its implications to westerly winds.
We found that the diameters of insoluble microparticles in the central West
Antarctica ice core are significantly correlated with cyclone depth (energy)
and wind intensity around Antarctica.
Revised: 12 Dec 2012 – Accepted: 04 Jan 2013 – Published: 25 Feb 2013
Citation: Cataldo, M., Evangelista, H., Simões, J. C., Godoi, R. H. M., Simmonds, I., Hollanda, M. H., Wainer, I., Aquino, F., and Van Grieken, R.: Mineral dust variability in central West Antarctica associated with ozone depletion, Atmos. Chem. Phys., 13, 2165-2175, doi:10.5194/acp-13-2165-2013, 2013.