GEOB 102 Lecture Notes - Lecture 4: Convection Cell, Atmospheric Circulation, Geostrophic Wind

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 102
• Professor: Simon Donner

Document Summary

Kiribati: friction force, friction slows wind speed and influences wind direction (surface roughness ex. trees and buildings of different heights) Itcz moves n/s with sun moves w/ high pressure high pressure = dry weather (hadley cell moves with it) Itcz moves north in our summer why vancouver has wet winters and warm/dry summers high pressure zone (descending part of hadley cell) moves north: global surface patterns, 1. Subtropical high-pressure belts (30 : descending air in hadley cell is heated by compression becomes drier, surface air diverging from su(cid:271)t(cid:396)opi(cid:272)al highs ge(cid:374)e(cid:396)ate ea(cid:396)th(cid:859)s p(cid:396)i(cid:374)(cid:272)iple surface winds: 4: mid-latitude westerlies tropical trade winds, like itcz, high-p(cid:396)essu(cid:396)e (cid:272)ells (cid:862)follo(cid:449)(cid:863) the u(cid:374), (cid:373)ig(cid:396)ati(cid:374)g (cid:271)y (cid:1009)-10 in latitude, our summer = more insolation > entire circulation is shifted up, high pressure zone is moving up, 3. 5: rossby waves, rossby waves undulations of upper-level westerly winds, responsible for, poleward heat transport, storms bringing warm (cold) and moist (dry) air into the mid-latitudes from tropical (polar) regions.