Characterization of aerosol particles at Cabo Verde close to sea level and at the cloud level – Part 2: Ice-nucleating particles in air, cloud and seawater

• Published in: Atmospheric chemistry and physics 2020-02, Vol.20 (3), p.1451-1468
• Main Authors: Gong, Xianda, Wex, Heike, van Pinxteren, Manuela, Triesch, Nadja, Fomba, Khanneh Wadinga, Lubitz, Jasmin, Stolle, Christian, Robinson, Tiera-Brandy, Müller, Thomas, Herrmann, Hartmut, Stratmann, Frank
• Format: Article
• Language: English
• Subjects: Aerosol particles; Aerosols; Air masses; Atmospheric aerosols; Capes (landforms); Characterization; Chemical analysis; Cloud droplets; Clouds; Clouds (Meteorology); Comparative analysis; Depletion; Deserts; Droplets; Dust; Enrichment; Filters; Ice; Ice formation; Ice nucleation; Laboratories; Nucleation; Nucleation temperature; Organic carbon; Particulate matter; Precipitation; Salt (Food); Sea level; Sea spray; Sea surface; Seawater; Surface microlayer; Surface microlayers; Temperature; Troposphere; Water; Water analysis; Water purification; Water sampling; Water wells
• ISSN: 1680-7324; 1680-7316; 1680-7324
• DOI: 10.5194/acp-20-1451-2020

Ice-nucleating particles (INPs) in the troposphere can form ice in clouds via heterogeneous ice nucleation. Yet, atmospheric number concentrations of INPs (N.sub.INP) are not well characterized, and, although there is some understanding of their sources, it is still unclear to what extend different sources contribute or if all sources are known. In this work, we examined properties of INPs at Cabo Verde (a.k.a. Cape Verde) from different environmental compartments: the oceanic sea surface microlayer (SML), underlying water (ULW), cloud water and the atmosphere close to both sea level and cloud level.