advection - (meteorology) the horizontal transfer of heat or other atmospheric properties

climate change, global climate change - a change in the world's climate

convection - the transfer of heat through a fluid (liquid or gas) caused by molecular motion

chilling, cooling, temperature reduction - the process of becoming cooler; a falling temperature

heating, warming - the process of becoming warmer; a rising temperature

natural action, natural process, activity, action - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"