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Climate Change (Ch.13)
Terms in this set (18)
How is Climate change defined?
How the average variable are defined
What is the IPCC (intergovernmental panel on climate change)?
Worldwide organization where all of the top climate scientists come together and put up reports couple times a year. They inform the government about where the climate is headed
How do we reconstruct past climates?
Ice cores, tree rings, sediments, river bends etc
What happens if all of the land-ice melts?
The sea level would rise and cover lots of the coastal areas
Earth's past climate - was it warmer?
It was warmer and we are cooler now
What have temperatures done over the last century?
They have continued to increase at a very rapid rate
What is a climate feedback? What is the ice-albedo effect?
The ice reflects heat because it is bright. Melting of ice reducing earth's reflection making it warmer
Is the sun constant? What does this mean for climate?
The sun is not constant and goes through active period where it gives off more sun spots
What do volcanic eruptions do to global climate?
When volcanoes erupt they give off of greenhouse gases which trap the heat. It covers the climate in volcanic ash and cools the climate until the ash falls out
Earths distance from the sun
which way the Earth faces the sun
Earths tilt (how much are we tilted)
What causes a natural ice age?
Eccentricity, Precession, Obliquity are all lined up so the Earth is far from the sun and we are tilted away at our max tilt which causes the planet to cool off
How have people influenced climate
deforestation, air pollution
releasing CO2, methane gasses and trapping heat
What is the primary greenhouse gas?
What is the primary anthropogenic greenhouse gas?
What have CO2 levels done in the last 200 years?
Increased from 270 to 400
What do models project for the next century?
The world warming and being wetter
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