Articles | Volume 13, issue 4
Atmos. Chem. Phys., 13, 2165–2175, 2013

Special issue: Chemistry, microphysics and dynamics of the polar stratosphere:...

Atmos. Chem. Phys., 13, 2165–2175, 2013

Research article 25 Feb 2013

Research article | 25 Feb 2013

Mineral dust variability in central West Antarctica associated with ozone depletion

M. Cataldo1, H. Evangelista1, J. C. Simões2, R. H. M. Godoi3, I. Simmonds4, M. H. Hollanda5, I. Wainer6, F. Aquino2, and R. Van Grieken7 M. Cataldo et al.
  • 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
  • 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

Abstract. 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.

Final-revised paper