6 Here you are given radiosonde data from the Amundsen-Scott Station at the South Pole (elevation 2835 meters) at 00 UTC on July 24, 2015, including...
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8.6 Here you are given radiosonde data from the Amundsen-Scott Station at the South Pole
(elevation 2835 meters) at 00 UTC on July 24, 2015, including pressure (in mb), height (in
meters), temperature and dew point (in .C), wind direction (in degrees), and wind speed (in
knots).
PRES mb
HGHT m
TEMP .C
DWPT .C
DRCT deg
SKNT kt
668.0
2835
-69.7
-77.7
80
6
660.0
2909
-58.3
-66.3
26
13
647.0
3038
-44.9
-49.3
356
12
639.0
3122
-41.7
-46.7
336
11
626.0
3262
39.7
47.7
305
10
591.0
3657
-38.3
-46.3
240
10
567.0
3939
40.0
45.8
215
12
532.0
4373
12.5
-45.1
207
14
500.0
4790
-44.9
55.9
200
16
455.0
5418
17.7
-67.7
223
20
400.
6260
-53.1
-71.1
225
26
b. Did temperature increase or decrease with altitude in the lowest few hundred meters? At
what pressure level does this increase or decrease in temperature with height stop?
c. In the layer between the surface and the pressure level you identified in part (b), is the
lapse rate positive or negative? Briefly explain your answer, keeping in mind the definition
of "lapse rate." What is the formal name given to a layer with this type of vertical
temperature profile?
d. Assume a parcel of air at the surface is lifted to the pressure level you identified in part (b).
What will the parcel's temperature be once it is lifted? Will the parcel be positively or
negatively buoyant, and will it continue to rise on its own? Explain your answer. What
does this example demonstrate about the stability of a layer such as this?
e. Now calculate the lapse rate in the layer from 500 mb to 400 mb (express your answer
in C per km). Compare your answer to the dry and moist adiabatic lapse rates and
discuss the overall stability in this layer.

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