Articles | Volume 18, issue 15
Atmos. Chem. Phys., 18, 10985–11005, 2018
Atmos. Chem. Phys., 18, 10985–11005, 2018

Research article 07 Aug 2018

Research article | 07 Aug 2018

Establishing the impact of model surfactants on cloud condensation nuclei activity of sea spray aerosol mimics

Sara D. Forestieri et al.

Data sets

Water uptake, cloud condensation nuclei and surface tension: results from the MadFACTS campaign S. Forestieri, S. Staudt, T. Kuborn, C. Ruehl, T. Bertram, and C. Cappa

Short summary
Our work establishes how surface tension reduction influences droplet growth and activation of simple sea spray mimics (NaCl coated with fatty acids). Fatty acids can substantially reduce droplet surface tension near activation but have limited impact on activation. Coating of NaCl by palmitic acid (a wax) impedes water uptake, but this impedance is removed if oleic acid (a liquid) is mixed in. The properties that surface-active compounds need to impact activation are theoretically examined.
Final-revised paper