altitude, due to heating from the ground (which is warmed by sunlight). If the t
ID: 2139915 • Letter: A
Question
altitude, due to heating from the ground (which is warmed by sunlight). If the temperature
gradient |dT/dz| exceeds a certain critical value, convection will occur: Warm, low-density
air will rise while cool, high-density air sinks. The decrease of pressure with altitude causes
a rising air mass to expand adiabatically and thus to cool. The condition for convection to
occur is that the rising air mass must remain warmer than the surrounding air despite this
adiabatic cooling.
What is T(z) in this case? At what altitude must this model be wrong?
Please note that dT/dz=10 K/km
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