1. Meteo 003: Lab 6 Chapter 8: 1abc, 2abcd, 7ab, 9a, 11ab Chapter 9: 2, 6ab

2. 8.1abpg. 345

3. 8.1 Example Height Above Ground (m)Temperature (C) 020 50021 100015.5 Calculate the lapse rates for the two layers and determine the stability of each layer

4. 8.1c

5. 8.2pg. 345 a) Parcel will initially cool at dry adiabatic lapse rate What will the temperature need to be for a cloud to form? At what level does the parcel reach this temperature? b) Parcel cools at moist adiabatic lapse rate the rest of the way Find the temperature of the parcel at the peak (2500 m)

6. 8.2 cntd… c) Is the parcel warmer or cooler than the environment? If: Warmer -> Positively Buoyant -> Continue rising Colder -> Negatively Buoyant -> Sink back down d) Parcel is unsaturated now and descends 2500 m Warms at the dry adiabatic lapse rate (10ᵒC/km) during descent What processes occurred during ascent/descent that could have affected the temp. of the parcel?

7. 8.2 Example Assume a parcel starts at sea level and is forced to rise up Mt. Washington (~2000 m). The initial temperature and dew point of the parcel at sea level is 15ᵒC and 10ᵒC respectively. The environmental temperature at the summit is -4ᵒC. Assume dew point remains constant during initial ascent. Remember that once the parcel is saturated both temperature and dewpoint will decrease together. Find the level you’d expect a cloud to form, the temperature of the parcel at the peak of the mountain, and determine if the parcel will continue to rise (unstable) or sink back down (stable).

8. 8.7abpg. 349 a) Think of an air parcel descending from 9500 m to 1800 m Parcel will warm at dry adiabatic lapse rate Calculate the temperature change in that descent b) Is the temperature calculated from part (a) a comfortable room temperature? Convert Celsius to Fahrenheit to help

9. 8.9apg. 351 Parcels rise in unstable layers, whereas in stable layers they remain trapped close to the ground Is fog and haze more likely to form in unstable or stable layers? Reference figure 8.63a in your answer

10. 8.11abpg. 352 a) Clouds show up as white blobs on visible imagery Add in your response what the wind direction is. Look at cloud-free areas near the lakes to help figure it out. b) Winter/Summer? Morning/Afternoon/Evening/Overnight? Clouds shown are convective cumulus clouds What season and time of day are these most likely to form where they are? Think about the temperature of water and land at these times

11. 9.2pg. 401

12. 9.6abpg. 405 a) Parcels will cool at dry adiabatic lapse rate initially Determine the temperature parcels need to cool to for it to reach saturation at each location b) High-based thunderstorms lead to evaporation of the rain before it reaches the ground, which leads to fires

13. Chapter 8: 1abc, 2abcd, 7ab, 9a, 11ab Chapter 9: 2, 6ab Astrid (ais5396@psu.edu): 10-11 AM in 511 Walker Josh (jig5374@psu.edu): 2-3 PM in 6 th Floor Walker Wx Center Zach (zmg5025@psu.edu): 4-5 PM in 6 th Floor Walker Wx Center