Aerosol optical depth over the Arctic: a comparison of ECHAM-HAM and TM5 with ground-based, satellite and reanalysis data 1Institute of Atmospheric Sciences and Climate – CNR, Turin, Italy
02 Aug 2012
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
Received: 11 Jan 2012 – Published in Atmos. Chem. Phys. Discuss.: 28 Mar 2012 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.
Revised: 13 Jul 2012 – Accepted: 21 Jul 2012 – Published: 02 Aug 2012
Citation: von Hardenberg, J., Vozella, L., Tomasi, C., Vitale, V., Lupi, A., Mazzola, M., van Noije, T. P. C., Strunk, A., and Provenzale, A.: Aerosol optical depth over the Arctic: a comparison of ECHAM-HAM and TM5 with ground-based, satellite and reanalysis data, Atmos. Chem. Phys., 12, 6953-6967, doi:10.5194/acp-12-6953-2012, 2012.