updraughts
Warm ascending currents
Updraughts is the British spelling of updrafts—currents of air moving upward.
Warm air rises, creating updraughts that birds and gliders exploit for lift: The hawk circled lazily on the updraughts.
In meteorology, strong updraughts within storm clouds can suspend raindrops long enough to form hail.
Engineless soaring aircraft
- hang-gliderUnpowered airborne craft
- paragliderFoot-launched aircraft with fabric wing
- liftMechanism for vertical transport
- altitudeMeasured height above reference
soaring · cloudbase · glidepath · airspeed · variometer · circling · cross-country · sink
Heat transfer via motion
- buoyancyFluid's upward resistance
- heatTransferred thermal energy
- thermalsWarm air columns
- currentsDirectional flows of movement
temperature · cumulus · trigger · bubble · column · core · strength · cycle
Heat transfer via motion
- cumulusDense, billowing cloud type
- instabilityTendency toward unpredictable change
- thermalsWarm air columns
- buoyancyFluid's upward resistance
atmosphere · turbulence · convergence · lifting · fronts · cyclones · thunderstorms · pressure
Rising effortlessly upward
- raptorsCarnivorous birds of prey
- eaglesLarge predatory birds
- vulturesLarge carrion-eating raptors
- hawksKeen-eyed birds of prey
storks · kettling · circling · migration · wingspan · effortless · glide · albatross
Movement of atmosphere
- exhaustUse up entirely
- shaftNarrow vertical passage
- atriumRoofed central hall
- ductworkHVAC distribution channels
extraction · flue · cooling · circulation · vents · stratification
sailplane
Engineless soaring aircraft
- hang-gliderUnpowered airborne craft
- paragliderFoot-launched aircraft with fabric wing
- liftMechanism for vertical transport
altitude · soaring · cloudbase · glidepath · airspeed · variometer · circling · cross-country · sink
convection
Heat transfer via motion
currents · temperature · cumulus · trigger · bubble · column · core · strength · cycle · release
convection
Heat transfer via motion
- cumulusDense, billowing cloud type
- instabilityTendency toward unpredictable change
- thermalsWarm air columns
buoyancy · atmosphere · turbulence · convergence · lifting · fronts · cyclones · thunderstorms · pressure · gradient
soaring
Rising effortlessly upward
hawks · storks · kettling · circling · migration · wingspan · effortless · glide · albatross · condor
airflow
Movement of atmosphere
ductwork · extraction · flue · cooling · circulation · vents · stratification
updraughtsdowndraughts
Descending air currents
downdrafts · subsidence · microbursts · downwelling · downbursts
draft, uplift, indraft, redraft, upend, draught, drafty, redrafting, updraft