Two classes of warm-season meteorological events in Southern Quebec have been studied. (1) thunderstorms and (2) mesocyclones detected by radar. / Characterization of the synoptic-scale flow accompanying warm-season mesoscale vortices and isolation of the moisture flow are documented. A comparison of both 500-hPa height and dynamic tropopause potential temperature composite fields between each set is completed. Precipitable water content and mixing ratio composites of the two classes are diagnosed. / The storm sample associated with mesocyclones show an organized trough-ridge couplet 3 to 4 days before the onset time. Strong precursors of coherent dynamic tropopause forcing seen several days in advance for the mesoscyclones are not as apparent in the thunderstorm sample. During several days prior to the events, the Atlantic Ocean, the Gulf of Mexico and the Great Lakes form a wider and more active area feeding moisture into the mesocyclonic systems than into the thunderstorms.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.29414 |
| Date | January 2002 |
| Creators | Bocquet, Florence |
| Contributors | Gyakum, John (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: 001956135, proquestno: MQ85766, Theses scanned by UMI/ProQuest. |
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