ACE Norway 2015 - The Earth's Orbit

Transcript

1. E A R T H ’ S O R B I T R O B E R T S I M P S O N
2. S O M E N O T E S B U T F I R S T
3. S O M E G O O D N E W S • Wine with dinner tonight thanks to Hurtigruten • Walking tours in Hammerfest and Tromsø thanks to Karin • but… on Sunday we need to have dinner at 4pm not 7:30pm
4. A U R O R A S A FA R I - S U N D AY N I G H T • Pick up at 6:15pm on Sunday evening from Radisson Blu • ACE have arranged for us to have ur own coach and guide • Basecamps with wood fires, hot drinks, snacks • Tripods, advice on cameras • Only restriction is a 100-200m walk from coach to base camp • Dress up warm, but with layers (warm at basecamp) 84% success rate
5. E A R T H ’ S O R B I T R O B E R T S I M P S O N
8. S I M P L E M O D E L
9. O N T H E M O V E • 100,000 kph (62,000 mph) • 365.24219 days • 940 million km (584 million miles)
11. T O P V I E W
12. T O P V I E W
13. N S S I D E V I E W
14. S S S S N N N N W I N T E R S U M M E R S P R I N G A U T U M N S E A S O N S
15. S S S S N N N N S O L S T I C E S O L S T I C E E Q U I N O X E Q U I N O X
19. I M A G E : W I K I M E D I A C O M M O N S ( TA U ʻ O L U N G A )
21. I M A G E : W I K I M E D I A C O M M O N S ( TA U ʻ O L U N G A )
23. I M A G E : W I K I M E D I A C O M M O N S ( TA U ʻ O L U N G A )
25. I M A G E : W I K I M E D I A C O M M O N S ( YA N Z H A N G )
26. T H E E A R T H S P I N S R O L L I N G , R O L L I N G , R O L L I N G
27. T H E E A R T H S P I N S R O L L I N G , R O L L I N G , R O L L I N G
39. G O R E Y H A R B O U R , J E R S E Y; W I K I M E D I A C O M M O N S ( F O X Y O R A N G E )
55. C H E LYA B I N S K M E T E O R F E B R U A RY 2 0 1 3
62. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit)
63. W I N T E R S U M M E R S P R I N G A U T U M N 4 1 , 0 0 0 Y E A R S
64. W I N T E R S U M M E R S P R I N G A U T U M N 4 1 , 0 0 0 Y E A R S
65. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit) • Axial precession about our axis; like a wobbling spinning-top
66. 2 3 , 0 0 0 Y E A R S
67. 2 3 , 0 0 0 Y E A R S
68. 2 3 , 0 0 0 Y E A R S
71. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit) • Axial precession about our axis; like a wobbling spinning-top • Shape of our orbit becomes more and less elliptical.
72. W I N T E R S U M M E R S P R I N G A U T U M N 1 0 0 , 0 0 0 Y E A R S
73. W I N T E R S U M M E R S P R I N G A U T U M N 1 0 0 , 0 0 0 Y E A R S
74. M I L A N K O V I T C H C Y C L E S • Cycle in perihelion (precession of our orbit) • Axial precession about our axis; like a wobbling spinning-top • Shape of our orbit becomes more and less elliptical. • We are half way through these cycles
80. S U M M A RY • Earth is tilted as it spins, this creates our seasons • The Earth’s spin creates huge speed differentials, and the Coriolis effect • The Earth’s spin, and the gravity of the Moon and Sun contribute to tides • Our orbit takes us into the path of other orbiting bodies • Periodic changes in our spin, tilt and orbit affect the global temperature
81. H T T P : / / W W W. G I . A L A S K A . E D U / A U R O R A F O R E C A S T / E U R O P E / “Auroral activity will be moderate. Weather permitting, moderate displays will be visible overhead in Tromsø, Norway and Reykjavik, Iceland…”
82. TA C T I C S • After dinner, go get ready to go outside. • Take your things to the bar or cafe. • Go and check once in a while to see if whether is clear. (I will do this too) • If it is, stay outside for a bit. Give it time. • Tell someone if you can see them. Share the news!
83. TA C T I C S • Get away from ships lights, become dark adapted. • Don’t give up. • Come inside when your cold, and go back out in a bit. • Have a nap now if it will help.