ATSC 110 Lecture Notes - Lecture 3: Equinox, Northern Hemisphere, Polar Regions Of Earth
Document Summary
Chapter 3 - seasonal and daily temps fall semester. The earth is 5 million km (3. 1 million miles) further from the sun in summer than in winter for the. Northern hemisphere indicating that seasonal warmth is controlled by more than solar proximity. The e(cid:374)erg(cid:455) per area, gover(cid:374)s the earth"s seaso(cid:374)al cha(cid:374)ges. A sunlight beam that strikes at an angle is spread across a greater surface area and is therefore a less intense heat source than a beam impinging directly. Earth"s tilt of (cid:1006)(cid:1007). 5 a(cid:374)d its revolutio(cid:374) arou(cid:374)d the su(cid:374) creates seaso(cid:374)al solar e(cid:454)posure a(cid:374)d heati(cid:374)g patterns. A solstice tilt keeps a polar region with either 24 hours of light or darkness. An equinox tilt perfectly provides 12 hours of night and 12 hours of day for all non-polar regions. The earth"s at(cid:373)osphere reduces the a(cid:373)ou(cid:374)t of i(cid:374)co(cid:373)i(cid:374)g solar radiatio(cid:374) (cid:894)i(cid:374)solatio(cid:374)(cid:895) striki(cid:374)g the earth"s surface. The earth"s atmosphere and tilt combine to explain the variation in received solar radiation.
