UBC  ATSC 201 - Meteorology of Storms

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Week 11 14 - 20  Nov 2022
Monday (D1)No HW to submit this week, if last week was a holiday. Finish Homework from previous week.
Be sure your name, student number, and HW# are at top of every page.
Deadline:  Turn in your papers/printouts at the start of class, 2 pm Wednesday.
Morning
Midday
2 PMClass:
  1. Discussion & interaction on topics from last week (bring your clicker).
  2. Keynote slide show of satellite images.
  3. Web demos of satellite loops, and how to interpret them.

Readings:
S.Ch
8. p219-224 (top 2/3), and p227-235(top paragraph).  [Namely, skip the radiative transfer eq. and weighting functions, and skip details on the sounder and sounding retrievals.]



Topic: Tutorial on Weather-Satellite Image Interpretation
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Learning Goals
At the end of this section, you should be able to:

  1. Explain how weather satellites use radiation to remotely observe the earth.
  2. Categorize the main types of weather satellites in orbit.
  3. Compare capabilities and drawbacks of each imager channel, and explain why it is advantageous to use multiple channels.
  4. Retrieve satellite images from the web and interpret them to diagnose the clouds and weather.

EveningReadings
  • S.Ch11., p354- 359, p 367 - 369, p 371 - 372,  p 374 - 378 (first 3 paragraphs of p 378)
Warm-up Questions:
Do quiz W11 D2 online on Canvas. 
Topic: Global Circulation - 3: Jet Streams and Rossby Waves
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Learning Goals
(Start now before holiday.   Completion will be on Monday after the holiday).
At the end of this section, you should be able to:

  1. Compare the driving forces of the subtropical jet and the polar jet.
  2. Explain how jet stream strength and location varies with season.
  3. Explain why the variation of Coriolis force with latitude causes the restoring force that drives the Rossby wave.
  4. Compare the speed of short and long Rossby waves.
  5. Look at a weather map of the mid or upper troposphere, identify where the jet stream is, and forecast the speed and movement of the troughs and ridges of different wavelengths.
  6. Synthesize all processes involved in the global circulation to explain why the Earth's atmosphere has 3 dominant circulation bands in the N. Hemisphere, rather than one big Hadley cell.
Tuesday (D2)
Morning
Midday
Evening
10 PMDeadline to finish warm-up Qs. 
Wed (D3).
Morning
Midday
2 PMClass:
  1. Discussion & interaction on topics from readings (bring your clicker).
  2. Lecture on Airmasses and surface fronts.

EveningReadings
  • S.Ch12. p389-393, p397(starting at section 12.2.2)-402.
Warm-up Questions:
Do quiz W11 D4 online on Canvas.
Topic: Airmasses and Fronts - part 1
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Learning Goals
At the end of this section, you should be able to:

  1. Locate on a map the favored formation region for the following airmasses near N. America:  cP, cT, mP, mT, cA, and explain why airmasses have favored formation regions at all.
  2. Contrast a ridge and a high-pressure center, and compare them to troughs and low-pressure centers.
  3. Recognize warm, cold, and occluded fronts on weather maps.
  4. Anticipate the weather changes associated with passage of each type of front.
  5. Synthesize you knowledge of clouds and fronts to be able to look in the sky and make a weather forecast based on the clouds that you see.



Thurs (D4)
Morning
Midday
Evening
10 PMDeadline to finish warm-up Qs.
Friday (D5). 
Morning
Midday
2 PMClass:
  1. Discussion & interaction on topics from readings (bring your clicker).
  2. Lecture on frontal vertical structure, and on mid-troposphere (occluded) and upper-tropospheric (tropopause folds) fronts.

Evening
End-of-Week Numerical Homework Exercises.  
(Due at start of Monday's class.)
Homework 11:
S.Ch8 (use spreadsheet for all): A1d, A4d, A7d, A8d.

S.Ch11 (use spreadsheet for all): A11d, A22d, A23d.
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S.Ch12. (use spreadsheet for all): A1d, A7d, A8d, A11d,
E21.  <--CAUTION, last exercise is E, not A.

Readings
in preparation for Monday's lecture on weather map analysis:

S.Ch9. p267-268, 274-276, 279-281.


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Learning Goals
At the end of this section, you should be able to:
  1. Apply topics covered earlier this week to compute number answers & infer their significance. 
  2. Start reading about Extratropical Cyclones (i.e., Lows).

Saturday(D6)
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Sunday (D7)
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