| The Basic Questions |
|
|
|
|
|
|
|
| q | How could CO2 vary by 30% or more over orbital time |
|||||
| scale? |
||||||
| q | What factors can explain the observed 90-ppm dip in CO2 |
|||||
| level during glacial intervals from the levels observed in |
||||||
| interglacial intervals? |
||||||