GEOG 101 Lecture Notes - Lecture 5: Shortwave Radiation, Solar Irradiance, Shortwave Radio
28 Sep 2018
School
Department
Course
Professor
Document Summary
Where insolation goes on earth energy absorbed by ground 49% Blocks s. w. during the day & emits/traps lw at night. Raises night time min. temp (warmer nights) Albedo = % of energy reflected from an object. Insolation is shortwave radiation: can be converted to other forms of energy. Shortwave (sw) converted to sensible heat, warming surface that warms the air: *shortwave is converted into latent heat during melting/evaporation. Factors affecting insolation: sun angle (intensity, day length (duration) Solar constant = flow rate of solar energy measured outside the atmosphere in watts/meters squared. Zenith angle: measures how far the sun is from vertical (the point right above your head, to where the sun is creates the angle) Angle of incidence: measures angle between sun and horizontal (your shoulder parallel) Daily variation of net radiation: positive after sunrise, peaks at noon, decreases to negative after sunset.
