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Paleoclimate Flashcards | StudBud

Explore/Paleoclimate

Paleoclimate

7 terms·StudBud Administration·354 plays

to accompany climate change lecture

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Questions 7

Answers

1
Ice Age cycles tell us:
Climate is very sensitive but global forcing must be present
Climate is very sensitive to forcing and very fast
Climate is sensitive to forcing & insolation redistribution
Climate is not very sensitive to forcing
2
Ice ages are 'paced' by summer insolation at ~65N because:
All of the above
Summer temperatures control whether ice sheets can form
Ice sheets form first at higher latitudes (~60-90 degrees)
The Northern Hemisphere has more land than the Southern
3
The uplift of the Himalayas has caused Earth to slowly cool for 50 million years, telling us:
CO2 changes naturally so cannot be linked to humans
Dinosaurs wouldn't like it if they came back
Mountain building always controls climate changes
CO2 changes lead to substantial climate response
4
There is no evidence that climate changes influenced:
The spread of Islam out of Arabia
The American Revolution & Napoleonic Wars
Medieval Times (the era, not the restaurant)
The Roman and Norse Empires
5
Which orbital feature causes the seasons?
Tilt of the Earth's axis
Precession of the Earth's axis & orbit
Eccentricity of the Earth's orbit
6
Which orbital variation changes the total irradiance received by Earth?
Eccentricity
Precession
None
Axial Tilt (or Obliquity)
7
During the last millenium (prior to thermometers), we have:
Qualitative, but not quantitative data on temperature
Isotopes in ice cores to tell us what temperatures were
Multiple proxies to tell us what temperatures were
Limited knowledge due to wildly divergent datasets