GEOG 131 Lecture Notes - Lecture 26: Evapotranspiration, Rain Shadow, Longwave
Document Summary
Arid climates (30n+s: h= hot, k= cold, s= steppe, w= desert, bwh- desert hot, bwk- desert cold, grasslands and savannas. Causes: atypical weather patterns, such as a persistent high pressure system, persistent wind direction for an area, such as offshore ow, in uence of ocean currents, such as a cold current stabilizing atmosphere. Snowpack is the lowest- problem because in spring it melts and brings water down the sierra nevada to central valley: we rely on this for food, especially produce. What controls temperatures in b climate types: most dry climates are in subtropical region; high sun angle, most lack clouds and precipitation. Signi cant long wave radiation loss at night: can also be in cooler temperatures. Monday, november 6, 2017: descending air, cold ocean currents, rain shadow, continentality. Precipitation: potential evaporation > precipitation, water demand > water supply. Bwh climate (hot desert: temperature averages above 64. 4f (18c, potential evapotranspiration is more than twice the precipitation, location.
