OCNG 251 Lecture Notes - Lecture 6: 30Th Parallel North, Northern Hemisphere, Maximum Sustained Wind
23 Mar 2017
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Document Summary
Axis is titled 23. 5 degrees: furthest (cid:374)orth a(cid:374)d south, su(cid:374)"s rays hit dire(cid:272)tly at (cid:1006)(cid:1007). 5 degrees northern and southern latitude, extent of the tropics (cid:862)tropi(cid:272)al (cid:449)eather(cid:863) Tilt causes seasons as hemisphere is tilted more towards the sun, changes throughout the year. Warmer in summer, not necessarily because the earth is closer to the sun, but because the hemisphere is getting more direct sunlight. Sun is directly overhead at equator on equinoxes: vernal (spring) equinox: begins about march 21st, autumnal equinox: begins about september 23rd. Summer solstice: sun is directly overhead at tropic of cancer, 23. 5 degrees north latitude, begins about june 21st. Winter solstice: sun is directly overhead at tropic of capricorn, 23. 5 degrees south latitude, begins about december 21st. Why the tilt of the earth matters to the ocean. E(cid:374)ergy fro(cid:373) the su(cid:374)"s heat drives global ocean atmosphere circulation. Earth is unevenly heated due to the tilted axis, as well as: solar footprint, atmospheric absorption, albedo, reflection.
