Turbulences

turbulences d'écoulement : orographique, CAT / jets / vents, contrastes thermiques, sillageturbulences thermiques ou convectives : nuages convectifs (cu, cb) avec phénomènes associés (front de rafale, downburst)Détection via vision des nuages convectifs, sur aéroport systèmes LLWSAS (low level wind shear alert system) remplacés par TDWR (terminnal doppler weather radar), en vol capteurs infrarouges, radar micro ondes ou LIDAR Doppler (radar Doppler à techno laser qui mesure mvt de l'air à 5 / 600m devant l'avion).prévention en choissant alti et trajectoire, en restant sous le vent d'un relief ou d'un nuage, réduction vitesse en vol en route, augmentation vitesse en basse altitude. Evitement total sur supercellule orageuse (30 à 50km diamètre)Is Turbulence Worse?If you saw recent reports about turbulence getting worse, forget about it. The speculation is that in the future, there may be more. There is no current increase, and I suspect the speculation about an increase in the future is incorrect.In any case, turbulence is not a safety threat; it is just that we automatically think downward motion signifies threat. It does if we are standing on something, for if the ground fell out from under us, that would be dangerous. But, as you know from being out of doors, when there is a breeze, it changes how strong it is and its direction. That is on the ground where the ground makes these changes in flow speed and direction horizontal. When up in the air, the changes can be in any direction, left - right or up and down. So when the plane is passing through the air, the up and down changes - completely natural in the air - don't feel natural to us because we are not used to up and down changes, which makes them seem threatening. Up and down changes on the ground are a threat on the ground but are not a threat in the air. If we were birds, we would know that.