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AREP GURME 1 Section 10 Exercise Exercise Interpreting Radiosondes Mixing height calculator Using HYSPLIT Flowchart of good/poor air quality.

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Presentation on theme: "AREP GURME 1 Section 10 Exercise Exercise Interpreting Radiosondes Mixing height calculator Using HYSPLIT Flowchart of good/poor air quality."— Presentation transcript:

1 AREP GURME 1 Section 10 Exercise Exercise Interpreting Radiosondes Mixing height calculator Using HYSPLIT Flowchart of good/poor air quality

2 AREP GURME 2 Section 10 Exercise Exercise – Interpreting Radiosondes (1 of 5) Instructions Determine the following for each day – 850-mb temperature – Inversions – Afternoon mixing height based on morning temperature sounding and the given forecast maximum temperature – Afternoon mixing height on afternoon sounding Answer the following questions – Did the mixing height estimate from the morning sounding match the mixing height determined from the afternoon sounding? – How would you expect morning and afternoon air quality concentrations to compare based on vertical mixing alone? – How would air quality concentrations compare between the days? Time: 15 minutes

3 AREP GURME 3 Section 10 Exercise Exercise – Interpreting Radiosondes (2 of 5) Day 1 morning sounding – forecasted maximum temperature: 33 °C

4 AREP GURME 4 Section 10 Exercise Exercise – Interpreting Radiosondes (3 of 5) Day 1 afternoon sounding

5 AREP GURME 5 Section 10 Exercise Exercise – Interpreting Radiosondes (4 of 5) Day 2 morning sounding – forecasted maximum temperature: 31 °C

6 AREP GURME 6 Section 10 Exercise Mixing height calculator

7 AREP GURME 7 Section 10 Exercise Exercise – Interpreting Radiosondes (5 of 5) Day 1 afternoon sounding

8 AREP GURME 8 Section 10 Exercise Exercise – Using HYSPLIT Instructions: Run backward HYSPLIT trajectories at various levels to determine possible transport sources. Experiment with the different options of the program (i.e., vertical motion scheme). Time: 15 minutes

9 AREP GURME 9 Section 10 Exercise Exercise – Flowchart Instructions: Fill in a flowchart to identify conditions for both good and bad air quality. Time: 15 minutes

10 AREP GURME 10 Section 10 Exercise Exercise – Flowchart Good AQ Upper-level pattern Vertical motion Stability Surface pressure pattern Inversion strength Sky cover Amount of photochemistry Wind strength Amount of horizontal dispersion Amount of vertical mixing

11 AREP GURME 11 Section 10 Exercise Exercise – Flowchart Poor AQ Upper-level pattern Vertical motion Stability Surface pressure pattern Inversion strength Sky cover Amount of photochemistry Wind strength Amount of horizontal dispersion Amount of vertical mixing

12 AREP GURME 12 Section 10 Exercise Exercise – Map Discussion Instructions: Have a local forecaster lead a map discussion, focusing on the features discussed in this section. Time: 45 minutes


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