Reasons for climate change Flashcards
1
Q
Volcanism
A
-Eruptions put ash in atmosphere, blocking sunlight + reducing global temps
2
Q
Orbital Cycles
A
Axis tilt - Axis tilts causing more extreme summer/ winters
Wobble - Earth wobbles on axis changing reasons
Elliptical/ Circular orbit - Elliptical orbit means Earth further from sun, glacials
2
Q
Solar Variation
A
-Amount of radiation sun produces over time
-Sunspots can cause warming (Little Ice Age possibly due to no sunspots)
-Low solar activity causes glacial, high causes interglacials
3
Q
Milankovitch Cycles
A
21,000 - Northern hemisphere close to sun in winter, further in summer
41,000 - Axis tilting/ straightening. More tilt = hotter summer, cooler winter
100,000 - Orbit circular/ elliptical
