what type of front has cold air moving into warm air
Weather front An occluded front is formed when a cold front overtakes a warm front,[8] and usually forms around mature low-pressure areas.[2] The cold and warm fronts curve naturally poleward into the point of occlusion, which is also known as the triple point.[9] It lies within a sharp trough, but the air mass behind the boundary can be either warm or cold. In a cold occlusion, the air mass overtaking the warm front is cooler than the cool air ahead of the warm front and plows under both air masses. In a warm occlusion, the air mass overtaking the warm front is warmer than the cold air ahead of the warm front and rides over the colder air mass while lifting the warm air.[2]
Lapse rate However, when air is hot, it tends to expand, which lowers its density. Thus, hot air tends to rise and transfer heat upward. This is the process of convection. Convection comes to equilibrium when a parcel of air at a given altitude has the same density as the other air at the same elevation.