Global Climate Change
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Where has the oldest and youngest ice ages
young wisconsin old nebraska
the sediment on the ocean floor is mostly what?
skeletal material from plankton
Milkanovich theory of climate change
orbit not perfectly circular, distance between earth and sun varies 100kyears
tilt 23.5 degrees goes back and forth 2 degrees 41kyears
earth's axis wobbles, sometimes oriented towards sun sometimes away, 21 kyears
what are the levels in CO2 in the glacial atmospher?
who proposed iron fertilization hypothesis?
what are possible mechanisms for glacial periods
ocean temperature changes, alkalinity cahnges, nutrient changes
climate change is more
abrupt than smooth
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