GEOB 102 Lecture Notes - Lecture 10: Cyclogenesis, Cumulonimbus Cloud, Wind Shear

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 102
• Professor: Greg Henry

Document Summary

Liting of warm air ceases so cyclone loses source of energy and moisture. Remember that winds alot steer the pressure systems on the surface. Divergence(convergence) alot can strengthen a low(high) pressure system on the surface. Take strong uplit to create a tornado, and doesn"t happen oten. Small and intense cyclonic corices can be generated with cumulonimbus development, generally in advance of a cold front. Key diference between tropical and mid-laitude weather systems: weaker upper level winds: Weather system won"t move as fast, because there is no wind to drag: air masses uniformly moist and warm: No diferent air masses, collision is unlikely. Tropical cyclone isn"t developed like mid-laitude cyclone: warm moist air: Slow-moving troughs of low pressure can develop within the tropical easterlies. Convergence on the rear side of the wave causes scatered showers and thunderstorms. Some key requirements: easterly waves: triggers deep convecion, high sea surface temperatures(26 deg c or more)