GLY 102 Lecture Notes - Lecture 5: Northern Hemisphere, Bighorn Basin, Coral Bleaching

• School: University at Buffalo
• Department: Geology
• Course: GLY 102
• Professor: Jason Briner

Document Summary

Tuesday 3:30-4:30 (cid:862)lo(cid:374)g ter(cid:373)(cid:863) (cid:272)o(cid:374)trols o(cid:374) (cid:272)li(cid:373)ate (cid:272)ha(cid:374)ge. Drake passage changed ocean currents, change climates. Ice age is a flickering of the earth: 30% ice cover 10% ice cover. Orbital parameters of the earth around the sun. The earth"s or(cid:271)it arou(cid:374)d the u(cid:374: eccentricity. Ho(cid:449) o(cid:448)al the earth"s or(cid:271)it is arou(cid:374)d the su(cid:374) Perihelion- part of orbit where earth is close to the sun (peri- near something) ( hellion- sun) Aphelion part or orbit where earth is far from the sun: obliquity this orbital parameter (changing tilt) If the a(cid:454)is (cid:449)as(cid:374)"t tilted no seasons. If the earth tilted more, we would have intense seasons: warmer summers, colder winters. Other planets like mars have big obliquity changes. Controls seasonality: precession changing date of perihelion. The timing of the year the earth tilts changes over time. Today: northern hemisphere summer away from the sun. January, perihelion, northern hemisphere facing away from the sun.