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Tephigram exercise 1 First we plot the temperature.

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Presentation on theme: "Tephigram exercise 1 First we plot the temperature."— Presentation transcript:

1 Tephigram exercise 1 First we plot the temperature

2 Tephigram exercise 1 First we plot the temperature

3 Tephigram exercise 1 The red dots are the humidity

4 Tephigram exercise 1 Depth of the PBL?

5 Tephigram exercise 1 Depth of the PBL Approx 100 hPa

6 Tephigram exercise 1 Q: RH at 1000 hPa?

7 Tephigram exercise 1 RH=rv/rs = 5 / 7.7 = 65%

8 Depth of the Is the PBL well mixed? Potential temperature at 800 hPa? (two ways)

9 Potential temperature at 800 hPa? 291K – Two ways to read…

10 Potential temperature at 800 hPa? 291K – Two ways to read… 700?

11 What is the condensation temperature and pressure of parcel at 1000 hPa? 910 hPa and 2.5 o C Tephigram exercise 2

12 What is dew point temperature of parcel at 1000 hPa? Approximately 4 o C

13 Rainfall evaporated into parcel at 1000 hPa? Becomes saturated at 7 o C, called the “wet-bulb temperature” Mixing ratio at this point is 6.3 g kg -1

14 What is the equivalent potential temperature of parcel at 1000 hPa? 22.5 o C – this is the same as the equivalent temperature.

15 What is the equivalent potential temperature of parcel at 900 hPa? 900 hPa = 23 o C, 700hPa off the page, different tephigram bounds required It is increasing with height.

16 What are the LCL and LFC for parcel at 1000 hPa? LCL is 910 hPa (same as condensation pressure). LFC undefined. Trigger temperature 17 o C, convection unlikely, as requires strong heating. Tephigram exercise 3

17 What is dew point temperature of parcel at 1000 hPa? Approximately 4 o C

18 A B C D E F

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20 Tephigram V: Convective Instability

21 Convective Instability

22 Tephigram V: Convective Instability

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24 1.Stable 2.-8C and -14C

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28 Gate sounding

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