Instructors: Prof. Gregory Hakim (685.2439) (www)
Dr. Lynn McMurdie (685.9405)
Department of Atmospheric Sciences; University of Washington
This course surveys the dynamics of synoptic- and meso-scale disturbances including extratropical cyclones and fronts, inertia-gravity waves, and topographically forced flows. We will also consider atmospheric adjustment to geostrophy in extratropical latitudes and normal modes of the tropical atmosphere. Insight into the dynamics of these features is gained through systematic simplification of the governing equations applied to idealized, but realistic, approximations of atmospheric structure.
Final Exam review page
Prerequisites: ATMS 441 (503).
Class meets: M W F 1:30-2:20 p.m. JHN 111 (lecture) and T 1:30-4:20 p.m. ATG610 (laboratory).
Lab home page
Text: An Introduction to Dynamic Meteorology, by J. R. Holton (Academic Press, 2004, fourth edition)
GJH Office hours: , or by appointment.
Syllabus ("Q" = Friday quiz):
|Week 1||Math background; wave properties|
|Week 2||Q||Waves in rotating shallow water.|
|Week 3|| ||Shallow water waves; geostrophic adjustment|
|Week 4||Q||Geostrophic adjustment; quasi-geostrophic (QG) equations|
|Week 5||QG equations and cyclogenesis|
|Week 6||Q||Baroclinic instability|
|Week 8||Q||The energy cycle|
|Week 9||Internal gravity waves and mountain flows|
|Week 10||Q||Tropical waves & hurricanes|
Holidays: 17 January (Martin Luther King Day); 21 February (Presidents Day).
Final Exam: Monday 14 March 2:30--4:20 pm
Grading: Homework: 25%; Laboratory 25%; Quizes 25%; Final exam 25%.
Notes on baroclinic instability
Real-time QG diagnostics
500 hPa spectrally decomposed
CDC OLR and tropical modes
- Sum of two plane waves in a stationary frame
- Sum of two plane waves in a frame moving with the group speed
- Sum of two plane waves in a frame moving witht the phase speed
- Hovmoeller diagram for a sum of two dispersive plane waves.
- Hovmoeller diagram for the sum of two non-dispersive plane waves.
- Page with both.
Cyclone climatology and preferred tracks.
Eady most unstable growing mode.
Eady most unstable decaying mode.
Observations of baroclinic waves
Idealized cyclone development in Eady's model
Hovmoeller of an observed case of downstream development
Hovmoeller of tropical modes in outgoing longwave radiation
Tropical beta-plane dispersion diagram
Eastward gravity wave
Westward gravity wave
Rossby wave (n=1)
Rossby wave (n=2)
Mixed Rossy-gravity wave
Western Pacific satellite image (another)
Hurricane maximum potential intensity
Hurricane structure images:
cross section 1
cross section 2
The "stadium effect" (thermal wind balance)