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

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

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

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

Mixing height calculator Section 10 Exercise

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

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