Cases of elevated deep moist convection initiation above frontal surfaces in 2015

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dc.contributor.authorKehler, Scott
dc.contributor.examiningcommitteeStewart, Ronald (Environment and Geography) Fulton, Dan (Environment and Climate Change Canada)en_US
dc.contributor.supervisorHanesiak, John (Environment and Geography)en_US
dc.date.accessioned2017-09-07T23:35:01Z
dc.date.available2017-09-07T23:35:01Z
dc.date.issued2017
dc.degree.disciplineEnvironment and Geographyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractFrontal structures, their associated parcel trajectories, and mesoscale circulations were analyzed to determine how they contributed to cases of elevated convection initiation (ECI). The steepest observed front had a mean slope of 1:130, while the shallowest front had a mean slope of 1:320, although frontal slopes were non-uniform. Isentropic ascent of the low-level jet (LLJ) on warm and stationary fronts was found to transport water vapour up the frontal surface, helping to reduce convective inhibition. When the LLJ ascended fronts it also caused upward vertical motion with maximum observed isentropic vertical velocities of -10 μb/s and maximum observed kinematic vertical velocities of -12 μb/s. The convergence of the LLJ was also shown to cause frontogenesis and the development/enhancement of potential vorticity (PV) anomalies. Both frontogenesis and PV anomalies were found to contribute to ECI.en_US
dc.description.noteOctober 2017en_US
dc.identifier.urihttp://hdl.handle.net/1993/32511
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectElevated convectionen_US
dc.subjectMesoscale meteorologyen_US
dc.subjectFrontsen_US
dc.subjectConvection initiationen_US
dc.titleCases of elevated deep moist convection initiation above frontal surfaces in 2015en_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
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