Which description matches a front with a cooler air mass behind, a warmer air mass ahead, and an even warmer air mass above?

Which description matches a front with a cooler air mass behind, a warmer air mass ahead, and an even warmer air mass above?

• A. Warm front
• B. Cold occlusion
• C. Cold front
• D. Stationary front

Answer: (B)

Fronts show how temperatures change across a boundary, and an occluded front happens when a cold front overtakes a warm front, lifting the warm air upward. In the cold-occlusion setup, the surface behind the front remains cool, the surface ahead is warmer, and there is still a warmer air mass overhead. That arrangement—cool air behind, warmer air ahead, and an even warmer layer above—fits a cold occlusion. It’s different from a plain cold front or a warm front, where the vertical temperature layering at the surface doesn’t include that lifted, warmer air aloft in the same way.

Fronts show how temperatures change across a boundary, and an occluded front happens when a cold front overtakes a warm front, lifting the warm air upward. In the cold-occlusion setup, the surface behind the front remains cool, the surface ahead is warmer, and there is still a warmer air mass overhead. That arrangement—cool air behind, warmer air ahead, and an even warmer layer above—fits a cold occlusion. It’s different from a plain cold front or a warm front, where the vertical temperature layering at the surface doesn’t include that lifted, warmer air aloft in the same way.