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Atmosphere 2017, 8(1), 2;

Assessing Upper Tropospheric Jet Streak Proximity Using the Rossby Radius of Deformation

Department of Atmospheric Science, University of Missouri, Columbia, MO 65211, USA
Department of the Earth Sciences, The College at Brockport, State University of New York, Brockport, NY 14420, USA
Author to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Received: 26 September 2016 / Revised: 17 December 2016 / Accepted: 20 December 2016 / Published: 29 December 2016
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The Rossby radius of deformation is a parameter that describes the relative role of buoyant and inertial forces for atmospheric phenomena in a flow regime. It will be demonstrated that it can also be used to determine whether or not forcing for vertical motions in the region between upper level tropospheric jet streaks overlaps or interacts. Using predefined points in the entrance and exit regions of neighboring upper level jet streaks, the distance between them is calculated for each event. If they are closer than twice the Rossby radius of deformation, the resulting region affected by both streaks is termed the Rossby Radius of Deformation Overlap Zone (RRDOZ). Plan-view and cross-sectional analysis shows that ageostrophic transverse circulations within the RRDOZ led to enhanced upward vertical velocities as predicted in prior research. Lastly, a short-term climatology for overlap events in North America is derived, and these are classified according to three proposed archetypes. View Full-Text
Keywords: jet streaks; climatology; interaction; Rossby radius of deformation jet streaks; climatology; interaction; Rossby radius of deformation

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Kastman, J.S.; Market, P.S.; Rochette, S.M.; Lupo, A.R. Assessing Upper Tropospheric Jet Streak Proximity Using the Rossby Radius of Deformation. Atmosphere 2017, 8, 2.

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