Instructors:Prof. Gregory Hakim (685.2439) (www)Dr. Lynn McMurdie (685.9405)Department of Atmospheric Sciences; University of Washington

Description: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 7 | Frontogenesis | |

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%.

Homework:

Additional resources:

Group velocity

- 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
dispersiveplane waves.- Hovmoeller diagram for the sum of two
non-dispersiveplane waves.- Page with both.

Cyclone climatologyandpreferred tracks.

Eady most unstable growing mode.

Eady most unstable decaying mode.

eady_442.m

Observations of baroclinic waves

Idealized cyclone development in Eady's model

Downstream development

Hovmoeller of an observed case of downstream development

Hovmoeller of tropical modes in outgoing longwave radiation

Tropical beta-plane dispersion diagram

Kelvin wave

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 1cross section 2reflectivityeyewall

The "stadium effect" (thermal wind balance)