Which statement is true regarding a cold front occlusion?

The statement that is true regarding a cold front occlusion describes the temperature dynamics involved when a cold front overtakes a warm front. In a cold front occlusion, the cold air mass associated with the cold front catches up to and lifts the warmer air mass ahead of the warm front. As a consequence, the air ahead of the warm front is indeed warmer than the air behind the overtaking cold front.

This process occurs because the front's dynamics lead to the warm air being forced upwards, and as this warmer air mass rises, it creates conditions that typically involve precipitation and changes in weather. The colder air behind the cold front appears at the surface after the vertical mixing has taken place.

Other statements might present information about temperature relationships or atmospheric conditions, but they do not accurately describe the scenario during a cold front occlusion where the warm air emerges ahead of the cold front. Understanding these temperature gradients is essential for predicting weather patterns associated with frontal passages.