This architectural drawing is Top view of LIFTING MECHANISM in detail AutoCAD drawing, dwg file, CAD file. An atmospheric process known as a lifting mechanism causes the air to rise. Thunderstorm convection or any rise caused by rising air due to positive buoyancy would NOT constitute a lifting mechanism. Cloud formation is mediated by four lifting processes: orographic lifting, convection, convergence, and updraft. For more details and information download the drawing file.