Characterisation of atmospheric aerosol sampled from an aircraft using electron beam techniques
Alberto Sánchez-Marroquín1, S. T. Parker2, J. Trembath3, I. Burke1, J. B. McQuaid1, B.J. Murray1
1Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
2Defence Science and Technology Laboratory, Salisbury, UK
3 Facility for Airborne Atmospheric Measurements, UK
Here we describe a technique to characterise atmospheric aerosol particles according to their morphological and chemical properties. Aerosol particles are collected at different altitudes and locations on filters using the inlet filter system on board of Facility for Airborne Atmospheric Measurements (FAAM) aircraft. The filter analysis is done in a Scanning Electron microscope (SEM) at the University of Leeds. Automation software is used to scan and get images of large areas of the filters, identify the aerosol particles and study their chemical composition using Energy Dispersive Spectroscopy (EDS). This technique is a powerful tool that we are currently using to evaluate the efficiency of the inlet system on board of the FAAM aircraft, and also to inform our simultaneous measurements of ice-nucleating particles.