Multi-wavelengths in-situ scattering and absorption measurements of Saharan dust particles during FRAGMENT

Abstract

Multi-wavelength in-situ surface scattering and absorption properties of PM2.5 and PM10 Saharan dust particles were measured during a dust emission field campaign performed in L’Bour (M’Hamid, Morocco) in September 2019 (Figure 1) within the FRAGMENT project (FRontiers in dust minerAloGical coMposition and its Effects upoN climaTe). The main goal of FRAGMENT is to understand and constrain the global mineralogical composition of dust along with its effects upon climate. Among other issues, the field campaigns are devoted to understanding the size distribution and mineralogy of emitted dust and its relationship with the parent soil properties. A wide variety of instruments for dust characterization were deployed including a radiometer, a fully equipped meteorological tower, cascade impactors, saltation sensors, OPC aerosol spectrometers, a polar nephelometer and an aethalometer, among others.