Small particles affect low-level Arctic cloud properties


Some seasonal news for December - A paper involving iMIRACLI supervisors Annica Ekman and Ilona Riipinen is currently under review in ‘Atmospheric Chemistry and Physics’ – an interactive open-access journal of the European Geosciences Union.  The topic of the paper is how small particles (diameters smaller than 80 nm) potentially can act as cloud condensation nuclei and affect low-level Arctic cloud properties. Normally, it is thought that only larger particles (>80nm) are relevant as these are the ones that are most efficient as cloud condensation nuclei. However, in the clean Arctic environment, it seems like the supersaturations within the cloud get high enough so that the smaller particles also activate.  The pre-print of this paper can be viewed at