Abstract
Laboratory studies of water uptake and ice nucleation (for temperatures ≤ -40°C) are presented for combustion particles of a wide range of physico-chemical properties, from hydrophobic through a range of hydrophilicity, to hygroscopic ones. Different mechanisms of water interactions with aircraft-generated soot aerosols of various compositions are considered for contrail and cirrus formation conditions. The findings generally confirm that heterogeneous ice nucleation is a function of surface oxidation of hydrophilic soot, hydrophobic soot initiates the ice phase from water vapor only at water supersaturated conditions while hygroscopic soot behaves in a manner reflecting homogeneous freezing with particles containing soluble matter.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 51-56 |
| Number of pages | 6 |
| Journal | DLR Deutsches Zentrum fur Luft- und Raumfahrt e.V. - Forschungsberichte |
| Issue number | 10 |
| State | Published - 2010 |
| Externally published | Yes |
Keywords
- Aircraft particulates
- Cirrus
- Contrail
- Ice nucleation
- Soot
ASJC Scopus subject areas
- Aerospace Engineering
- Space and Planetary Science
- Applied Mathematics