Convection 21 : The transfer of heat or moisture in a medium by the movement of a mass or substance. When used to imply only upward vertical motion, it is then the opposite of subsidence
Natural and Environmental Disaster Information Exchange System European Commission NEDIES, Glossary of Hurricane Terms - Canada Geological Survey - Natural Resources, Directorate General Joint Research Centre DG JRC, Institute for the Protection and Security of the Citizen (IPSC), Varese, Italy 2011. http://www.ns.ec.gc.ca/weather/hurricane/hurricane s9.html, (ND/ Hurr Sci - Amer) {153}