1 / 17

A Short Course in Basic Meteorology

A Short Course in Basic Meteorology. PART 3. Pierre Bourgouin, Dov Bensimon, René Servranckx Environment Canada – Canadian Meteorological Centre – Emergency Response Section Developed by: Julie Dion. Outline. Day 1 – Basic meteorology What is the atmosphere? (1/2 h – chap. 1)

ronda
Download Presentation

A Short Course in Basic Meteorology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A Short Course in Basic Meteorology PART 3 Pierre Bourgouin, Dov Bensimon, René Servranckx Environment Canada – Canadian Meteorological Centre – Emergency Response Section Developed by: Julie Dion

  2. Outline • Day 1 – Basic meteorology • What is the atmosphere? (1/2 h – chap. 1) • What fuels it? (1/2 h – chap. 2) • How does it move? (2 h – chap. 3 and 4) • How do we observe it? (1 h – chap. 5) • How is weather produced (1 h – chap. 6) • Day 2 – Basic meteorology (cont’d) • How is weather produced (1 h – chap. 7) • Day 2 – Dispersion and meteorological models • …

  3. Chapter 7 Atmospheric Stability and Dispersion

  4. How is weather produced? Equilibrium & Instability

  5. How is weather produced? Local and mesoscale

  6. How is weather produced? Types of equilibrium

  7. How is weather produced? Initial push

  8. How is weather produced? Stable atmosphere Relatively warm High levels Night cooling At low levels

  9. How is weather produced? Destabilization Cooling high levels Warming low levels

  10. How is weather produced? Air parcel buoyancy Cloud top Cloud base

  11. How is weather produced? D a y t i m e I n s o l a t i o n N i g h t t i m e c l o u d c o v e r S u r f a c e w i n d s p e e d M o s t l y M o s t l y S t r o n g M o d e r a t e S l i g h t ( k m / h ) C l o u d y C l e a r < 7 A A – B B — — 7 – 1 1 A – B B C E F 1 1 – 1 8 B B – C C D E 1 8 – 2 1 C C – D D D D > 2 1 C D D D D A = E x t r e m e l y u n s t a b l e D = N e u t r a l B = M o d e r a t e l y u n s t a b l e E = S l i g h t l y s t a b l e C = S l i g h t l y u n s t a b l e F = S t a b l e Estimating stability (Pasquill Stability categories) Strong mixing

  12. How is weather produced? Mixing and dispersion

  13. Exercise 4 Atmospheric Dispersion

  14. Chapter 8 Development of clouds, precipitation and severe weather (independent reading)

  15. Chapter 9 Air Quality (independent reading)

  16. Things to remember… • A North wind blows FROM the North. • The wind generally blows along the isobars. • The planetary boundary layer is generally well mixed. • Instability and wind speed affect mixing and dispersion. • The sun is the source of heating for the Earth. • Uneven heating of different parts of the earth puts air in motion. • The atmosphere always seeks an equilibrium by moving warm air to colder regions and vice versa.

  17. Thank you Some are weather-wise Some are otherwise. B. Franklin

More Related