GPHY 102 Lecture 9: Lecture 9 2014W.pdf

• School: Queen's University
• Department: Geography
• Course: GPHY 102
• Professor: Dr.Trezino

Document Summary

Environment, 5th edition, john wiley & sons, chapter 7 pp. Processes which cause air to move upwards and then cool to the dewpoint: orographic effect, convergence, convection, frontal lifting (warm and cold fronts) (cid:149) we"ll get to it, but first let"s discuss . Air masses are large bodies of air with relatively uniform temperature and moisture characteristics. Global scale air masses are named on basis of source region: (cid:149) arctic (a), polar (p), tropical (t), equatorial (e); and for origin: (cid:149) ocean (m for maritime) or land (c for continent). Processes which cause air to move upwards and then cool to the dewpoint: orographic lifting, convergent lifting, convective lifting, frontal lifting. Cold front (cid:149) cold air replaces warm air at a location. (cid:149) steep frontal surface. (cid:149) vertically developed, cumulus-type clouds. (cid:149) heavy precipitation of short duration. 3 http://www. classzone. com/books/earth_science/terc/content/visuali zations/es2002/es2002page01. cfm?chapter_no=visualization: cirrus, cirrocumulus, altocumulus, altostratus, nimbostratus, stratus, stratocumulus, cumulus, cumulonimbus.