Date of Award

1-1-2014

Language

English

Document Type

Master's Thesis

Degree Name

Master of Science (MS)

College/School/Department

Department of Atmospheric and Environmental Sciences

Content Description

1 online resource (xv, 132 pages) : color illustrations, color maps.

Dissertation/Thesis Chair

Lance F Bosart

Keywords

Cyclones, Winds, Atmospheric circulation, Jet stream

Subject Categories

Atmospheric Sciences

Abstract

A subset of Northeast U.S. cool-season cyclones is associated with upper-level easterly flow and, occasionally, well-defined easterly jet streaks. These events occur approximately once per year and may be associated with retrograding surface cyclones and precipitation caused by northerly warm-air advection, leading to forecast challenges. The deepest extratropical cyclone that affected the Northeast U.S. during the 2009-2010 cool-season was associated with an upper-level easterly jet streak, and produced a record snowfall total of 85 cm in Burlington, Vermont. Orographic precipitation enhancement in this case resulted from an interaction of the low-level flow with the complex topography of northern Vermont. This thesis explores the multi-scale aspects of similar anomalous cyclone events (ACEs) in the Northeast U.S. through climatological, composite and case study analyses.

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