Physical Geography Assignment

1. In Africa, which portion of the ecotone formed between the tropical deciduous biome and the Tropical savanna biome is growing, which way is it moving, and what are the causes?

2. Why is clear cutting of rain and deciduous forests in the tropic regions a bad idea?

3. What effects does a warming world have on the Northern Hemisphere's Biomes?

Explain this graph in the context of what we have discussed in class:

4. What was the cause of the warm up starting at ~18,000 and ~130,000 years ago?

5. What was the cause of the initial plunge into the glacial phases after the interglacials?

6. Today is the fifth time the world's temperature has been above the "0" line on this graph. Why is CO2 also high at each of these times? Dust concentration in the atmosphere is high when CO2 and temperature is low. Why?

In this warming interglacial, what should be happening to estuaries? Why not?