Tephigram exercise 1

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Tephigram exercise 1
First we plot the temperature
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Tephigram exercise 1
First we plot the temperature
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Tephigram exercise 1
The red dots are the humidity
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Tephigram exercise 1
Depth of the PBL?
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Tephigram exercise 1
Depth of the PBL Approx 100 hPa
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Tephigram exercise 1
Q RH at 1000 hPa?
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Tephigram exercise 1
RHrv/rs 5 / 7.7 65
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Depth of the PBL100hPa. RH_at_1000hPa65
_at_900hPa85
Is the PBL well mixed?
Potential temperature at 800 hPa? (two ways)
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Potential temperature at 800 hPa? 291K Two ways
to read
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700?
Potential temperature at 800 hPa? 291K Two ways
to read
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What is the condensation temperature and pressure
of parcel at 1000 hPa?
910 hPa and 2.5oC
Tephigram exercise 2
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What is dew point temperature of parcel at 1000
hPa?
Approximately 4oC
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Rainfall evaporated into parcel at 1000 hPa?
Becomes saturated at 7oC, called the wet-bulb
temperature Mixing ratio at this point is 6.3 g
kg-1
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What is the equivalent potential temperature of
parcel at 1000 hPa?
22.5oC this is the same as the equivalent
temperature.
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What is the equivalent potential temperature of
parcel at 900 hPa?
900 hPa 23oC, 700hPa off the page, different
tephigram bounds required It is increasing with
height.
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What are the LCL and LFC for parcel at 1000 hPa?
Tephigram exercise 3
LCL is 910 hPa (same as condensation pressure).
LFC undefined. Trigger temperature 17oC,
convection unlikely, as requires strong heating.
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What is dew point temperature of parcel at 1000
hPa?
Approximately 4oC
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F
E
D
C
B
A
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Tephigram V Convective Instability
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Convective Instability
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Tephigram V Convective Instability
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Tephigram V Convective Instability
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Tephigram V Convective Instability

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

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Gate sounding
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