Inversion 15 : Under high pressure and stable air conditions, warm air may cap cooler air, forming an inversion that traps smoke in valley bottoms, particularly at night
National Park Service, US Department of the Interior, Fire and Aviation Management, Terms and Definitions, National Interagency Fire Center NIFC, Boise, Idaho, USA 2010. http://www.nps.gov/nifc/fire/fir_str_termsdefiniti ons.cfm?letter=A, (Fr and Avn Mgt - Amer) {147}