Question

During which of the following times of the day is the 2 m air temperature usually the lowest at a tropical location?

• A. At sunrise
• B. At noon
• C. At sunset
• D. At midnight

Hint:

For tropical regions, the lowest temperatures occur at sunrise due to overnight cooling, after which temperatures gradually rise with sunlight exposure.

Answer 1

The Correct Option is A

At a tropical location, the lowest 2 m air temperature typically occurs at sunrise. This is because the ground and air have cooled overnight due to radiative heat loss, and the temperatures are at their lowest just before the sun rises. After sunrise, the temperature begins to increase as the sun heats the surface, warming the air.
- At noon, the temperature is generally the highest due to direct sunlight and the maximum heat absorption.
- At sunset, the temperature begins to decrease, but it is typically not as low as at sunrise.
- At midnight, temperatures can be lower than during the day, but they are not typically as low as at sunrise.
Thus, the correct answer is (A) At sunrise.