This preview shows page 1. Sign up to view the full content.
Unformatted text preview: lifetimes) changes hemispheric orientation through orbit and causes seasons-Solstices maximum axial tilt in relation to the sun (June and December); hemisphere axes inclined toward or away from sun causes maximum or minimum solar radiation receipt-Subsolar point (where sun is directly over head) occurs at the declination-Solar angle radiation is proportional to solar angle higher angles equal reduced beam spreading which equals greater heating-Period of daylight circle of illumination unequally bisects latitudes day length changes across latitudes (everywhere gets 12 hours day/ 12 hours night on equinox)-Beam depletion (attenuation) solar radiation diminished is relative to the path length (high solar angles = small energy reductions)-changes in energy receipt with latitude winter hemisphere = energy deficits; summer hemisphere = energy surplus-lower angles = increased path lengths...
View Full Document
- Fall '08