Atmospheric pressures fall at higher altitudes, but the composition of the atmosphere remains unchanged.
Most significant, Crutzen noted, people have altered the composition of the atmosphere.
The composition of the atmosphere encodes a great deal of information bearing on its origin.
Air bubbles trapped in the ice give direct evidence of the past composition of the atmosphere.
Currently CO2 makes up about 0.03 percent of the gaseous composition of the atmosphere.
Monitoring the composition of the atmosphere from space complements ground monitoring, Dr. Drummond said.
The chemical composition of the atmosphere also affects that of the ocean.
Imbalances in the biologic carbon cycle can change the composition of the atmosphere.
Interactions with the crust and, in particular, with living things the biosphere can strongly affect the composition of the atmosphere.
And that's just one effect of the way we are altering the chemical composition of the atmosphere.
Not in the sense that oil companies are radicals, whereby they are altering the composition of the atmosphere, just about the most radical action you can imagine.
