WIND Flashcards
FORCES EFFECTING WIND
PRESSURE GRADIENT FORCE, CORIOLIS FORCE, AND FRICTION
PRESSURE GRADIENT FORCE (PGF)
WIND FLOWS FROM HIGH PRESSURE TO LOW PRESSURE. THE CLOSER THE DIFFERENT PRESSURES (ISOBARS) ARE THE STRONGER THE WINDS
CORIOLIS FORCE
EFFECTS WIND AT A RIGHT ANGLE TO THE DIRECTION OF THE WIND AND IS DIRECTLY PROPORTIONAL TO WIND SPEED
LESS EFFECT AT THE EQUATOR AND HIGHER EFFECT AT THE POLES
DEFLECTS RIGHT NORTHERN
DEFLECTS LEFT SOUTHERN
FRICTION FORCE
FORCE BETWEEN THE WIND AND THE TERRAIN SLOWS THE WIND
FRICTION FORCE MAGNITUDE IS DIRECTLY PROPORTIONAL TO TERRAIN ROUGHNESS AND WIND SPEED
UPPER AIR WIND
OR GEOSTROPHIC WIND, PGF WINDS FLOWS FROM HIGH TO LOW THEN IS DEFLECTED BY CORIOLIS FORCE
WHICH BALANCE EACH OTHER OUT MAKING THE WIND PARALLEL TO CONTOURS
SURFACE WIND
FRICTIONAL FORCE SLOWS THE WIND , CORIOLIS FORCE DECREASES CAUSING THE PGF TO ACT AND WIND TO FLOW PERPENDICULAR TO THE ISOBARS