Referring to Figure 15, the Terminal Aerodrome Forecast (TAF) for KMEM includes the line 'BECMG 1310/1312 00000KT 3SM BR SKC'. The forecasted calm winds and clear skies during this becoming period primarily facilitate which heat exchange process?

Clear skies and calm surface winds exist at sunset when the temperature is 75°F. Radiational cooling is expected to produce a 5°F temperature decrease during the first hour after sunset, followed by 3°F decreases each hour thereafter. What is the approximate surface temperature 4 hours after sunset?

You are preflight planning a VFR departure from a small inland airport at 1100 local time. The latest METAR reports a temperature of 10°C and dew point of 7°C under clear skies. The TAF forecasts surface temperatures rising to 24°C by afternoon with light winds and no precipitation. Given the expected heat exchange between the Earth's surface and the overlying air, what is the MOST significant hazard during your takeoff and initial climb?