Loading...
Please wait, while we are loading the content...
Similar Documents
An experimental study of growth and phase change of polar stratospheric cloud particles
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Teets, Edward Hallett, John |
| Copyright Year | 1992 |
| Description | This report describes the progress made on understanding phase changes related to solutions which may comprise Polar Stratospheric Clouds. In particular, it is concerned with techniques for investigating specific classes of metastability and phase change which may be important not only in Polar Stratospheric Clouds but in all atmospheric aerosols in general. While the lower level atmospheric aerosol consists of mixtures of (NH4)(SO4)2, NH4HSO4, NaCl among others, there is evidence that aerosol at PSC levels is composed of acid aerosol, either injected from volcanic events (such as Pinatubo) or having diffused upward from the lower atmosphere. In particular, sulfuric acid and nitric acid are known to occur at PSC levels, and are suspected of catalyzing ozone destruction reactions by adsorption on surfaces of crystallized particles. The present study has centered on two approaches: (1) the extent of supercooling (with respect to ice) and supersaturation (with respect to hydrate) and the nature of crystal growth in acid solutions of specific molality; and (2) the nature of growth from the vapor of HNO3 - H2O crystals both on a substrate and on a pre-existing aerosol. |
| File Size | 488471 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930010698 |
| Archival Resource Key | ark:/13960/t4jm75v8v |
| Language | English |
| Publisher Date | 1992-03-01 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Crystal Growth Ozone Depletion Crystallization Supersaturation Ice Polar Meteorology Nitric Acid Ice Clouds Sulfuric Acid Atmospheric Chemistry Aerosols Supercooling Hydrates Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
