ESCI 1012 Lecture Notes - Lecture 19: Wind Shear, Saltwater Intrusion, 1935 Labor Day Hurricane
Document Summary
Localized heating causes initial uplift and formation of thunderstorms. Wind shear can cut off systems (typhoons hate wind shear),but if not present updrafts build. Updrafts pull surrounding surface air up into system. Highest temperature, and lowest pressure towards center of the storm. Highest winds and precipitation occur in eye wall. Although (cid:909)(cid:363)ar(cid:289) core(cid:910) stor(cid:289), eye is si(cid:290)ki(cid:290)g cooler air. Lowest pressure in eye with drops of up to 40 millibars. Pressure drop though is still relatively low. Sometimes can have diameters of 100-112 miles so coriolis effect comes into play, causing rotation of winds and can have much more effects than tornado systems. Air moving towards low pressure and begins to curve due to coriolis effect (cid:883)because of earth(cid:910)s rotatio(cid:290)(cid:884) leadi(cid:290)g to stor(cid:289) rotation. Although coriolis effect influences direction of storm and initiates rotation, speed of rotating winds is due to latent heat. Coriolis is a weak effect that only influences direction.
