COLD FRONT The advancing edge of a cold air mass. CONVECTION The transfer of heat, the vertical circulation of air causing cool air to descend and warm air to ascend.
(air; causing; cool air to descend and warm air to ascend) Context(air causing,List([111, 122))):(cool air; to descend; )
air causing,List([111, 122))
air cool air
causing to descend
cool air to descend and warm air to ascend