Supercooled cloud liquid water (SCW), which causes aircraft icing, can be detected indirectly by observing characteristics of the bright band with a vertically pointing radar. Accretion of supercooled water droplets on precipitating snow (riming) increases the density and fall speed of snow and decreases the intensity of the bright band. For stratiform precipitation with a melting layer, a small peak-to-rain reflectivity difference and a high snow-to-rain velocity ratio indicate high-density snow. A numerical model of the bright band gives a semi-quantitative relationship between snow density and bright band parameters. SCW content is computed theoretically and depends on the gradient of mass flux with height above the melting layer. A large mass flux gradient is an indication of growth by riming.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.33378 |
| Date | January 2000 |
| Creators | Bell, Candace. |
| Contributors | Zawadzki, Isztar (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Atmospheric and Oceanic Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001781990, proquestno: MQ70687, Theses scanned by UMI/ProQuest. |
Page generated in 0.0602 seconds