Published on: 2005-04-25
Estimated time to complete: .75 - 1.00 h
Includes audio: yes
Topic Area(s)
Convective Weather
Mesoscale Meteorology
Other
Winter Weather
Description:
This Webcast is based on a presentation given by Dr. James T. Moore of Saint Louis University at the 5th Annual MSC/COMET Winter Weather Workshop on 30 November 2004 in Boulder, Colorado. Dr. Moore reviews many aspects of jet streak dynamics including convergence/divergence, ageostrophic winds, propagation, and coupled jets.
Objectives:
- Define "jetstreak"
- Note the divergence associated with upper-level waves
- Describe the relationship of divergence with vertical windshear
- Describe the relationship of the ageostrophic wind components with upper-level and low-level jets
- Compare the direct thermal circulation in the entrance region with the indirect thermal circulation in the exit region of an upper-level jet
- Identify how the curvature of an upper-level jet affects divergence and convergence
- Describe the impact thermal advection has on vertical motion and entrance and exit circulations
- Gain an understanding of the characteristics of unbalanced jets and coupled jets
Keywords
jet streaks, jet streams, divergence, convergence, ageostrophic winds, entrance region dynamics, exit region dynamics