Journal article

Absorption properties of Mediterranean aerosols obtained from multi-year ground-based remote sensing observations

Mallet M, Dubovik O, Nabat P, Dulac F, Kahn R, Sciare J, Paronis D, Léon J ...see all

Atmospheric Chemistry and Physics, vol. 13, issue 18 (2013) pp. 9195-9210

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Abstract

Aerosol absorption properties are of high importance to assess aerosol impact on regional climate. This study presents an analysis of aerosol absorption products obtained over the Mediterranean basin or land stations in the region from multi-year ground-based AERONET observations with a focus on the Absorbing Aerosol Optical Depth (AAOD), Single Scattering Albedo (SSA) and their spectral dependence. The AAOD and Absorption Angstrom Exponent (AAE) dataset is composed of daily averaged AERONET level 2 data from a total of 22 Mediterranean stations having long time series, mainly under the influence of urban-industrial aerosols and/or soil dust. This dataset covers the 17-yr period 1996-2012 with most data being from 2003-2011 (similar to 89% of level-2 AAOD data). Since AERONET level-2 absorption products require a high aerosol load (AOD at 440 nm >0.4), which is most often related to the presence of desert dust, we also consider level-1.5 SSA data, despite their higher uncertainty, and filter out data with an Angstrom exponent

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Authors

  • Ralph KahnNASA/Goddard Space Flight Center

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  • M. Mallet

  • O. Dubovik

  • P. Nabat

  • F. Dulac

  • J. Sciare

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