Articles | Volume 12, issue 15
Atmos. Chem. Phys., 12, 6953–6967, 2012
https://doi.org/10.5194/acp-12-6953-2012
Atmos. Chem. Phys., 12, 6953–6967, 2012
https://doi.org/10.5194/acp-12-6953-2012

Research article 02 Aug 2012

Research article | 02 Aug 2012

Aerosol optical depth over the Arctic: a comparison of ECHAM-HAM and TM5 with ground-based, satellite and reanalysis data

J. von Hardenberg1, L. Vozella1,*, C. Tomasi2, V. Vitale2, A. Lupi2, M. Mazzola2, T. P. C. van Noije3, A. Strunk3, and A. Provenzale1 J. von Hardenberg et al.
  • 1Institute of Atmospheric Sciences and Climate – CNR, Turin, Italy
  • 2Institute of Atmospheric Sciences and Climate – CNR, Bologna, Italy
  • 3Royal Netherlands Meteorological Institute, de Bilt, The Netherlands
  • *now at: Dipartimento di Fisica Generale, Università degli Studi di Torino, Turin, Italy

Abstract. We compare ground-based measurements of aerosol optical depth and Ångström parameter at six Arctic stations in the period 2001–2006 with the results from two global aerosol dynamics and transport models, ECHAM-HAM and TM5. Satellite measurements from MODIS and the MACC reanalysis product are used to examine the spatial distribution and the seasonality of these parameters and to compare them with model results. We find that both models provide a good reproduction of the Ångström parameter but significantly underestimate the observed AOD values. We also explore the effects of changes in emissions, model resolution and the parametrization of wet scavenging.

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