Deactivation of ice nuclei due to atmospherically relevant surface coatings
Bibliographic Data
| ID | 15548830 |
|---|---|
| Authors | Daniel J Cziczo (0000-0003-1851-8740, Pacific Northwest National Laboratory, corresponding author), K D Froyd (0000-0002-0797-6028, National Oceanic and Atmospheric Administration), S Gallavardin (ETH Zurich), Stephane J Gallavardin, Ottmar Moehler, Stefan Benz (0000-0002-2533-1813, Karlsruhe Institute of Technology), Harald Saathoff (0000-0002-1301-8010, Karlsruhe Institute of Technology), Daniel M Murphy (0000-0002-8091-7235, National Oceanic and Atmospheric Administration) |
| Year | 2009 |
| Volume | 4 |
| Issue | 4 |
| Pages | 044013-044013 |
| Publication date | 2009-10-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/4/4/044013 |
| OpenAlex | W2125788934 |
| Language | EN |
| References cited | 34 |
The ice nucleation characteristics of Arizona test dust (ATD) and illite clay, surrogates for atmospheric ice nuclei, have been determined at the Aerosol Interactions and Dynamics in the Atmosphere (AIDA) chamber located at the Research Center Karlsruhe in Germany. The objective of this research was to determine the effect of sulfuric acid and ammonium sulfate coatings on the ability of these mineral dust surrogates to nucleate ice in an environment where particles realistically compete for water vapor. Coated ATD particles required higher saturations at all temperatures considered, from −20 to −45 °C, than did identical uncoated particles. Freezing of coated particles often required saturations approaching those for the homogeneous freezing of aqueous solutions of the coating material alone. Less pronounced effects were found for illite, although the presence of a coating consistently increased the saturation or decreased the temperature required for ice formation. Analysis of ice residue at the single particle level suggests that the first coated particles to freeze had thinner or incomplete coatings when compared to particles that froze later in the expansion. This observation highlights a need to verify coating properties since an assumption of homogeneity of a group of coated aerosols may be incorrect. The increase in saturation ratio for freezing suggests that gas-phase uptake of sulfates, a large fraction of which are due to anthropogenic emissions, will reduce the ice and mixed-phase cloud formation potential of atmospheric ice nuclei
Aerosol · Ammonium sulfate · Amorphous ice · Amorphous solid · Antarctic sea ice · Arctic ice pack · Chemical physics · Clear ice · Climatology · Coating · Composite material · Ice core · Ice nucleus · Metallurgy · Mineral dust · Mineralogy · Nucleation · Particle (ecology · Saturation (graph theory · Sea ice · Atmospheric aerosols and clouds · Atmospheric chemistry and aerosols · Atmospheric Ozone and Climate · Chemical Engineering · Chemistry · Materials Science · Geology
| Highly cited | No |
|---|