Word: jacob
(lookup in dictionary)
(lookup stats)
Dates: during 1990-1999
Sort By: most recent first
(reverse)
Ozone in the troposphere and the stratosphere play very different roles, which initially seem unconnected. Jacob says this is not the case. "Ozone is a very complicated molecule, just in terms of its environmental effects," he says...
...release on the order of a billion tons of material into the atmosphere," Jacob says. "The atmosphere can't hold that much, and what goes up must come down...
...Most of the oxidation takes place in the troposphere," said Jacob. "There are only a few strong radical oxidants that can perform the reactions. They ordinates from ozone...
...CFCs, which destroy stratospheric ozone, are going out, and HCFCs are coming in," Jacob says. "The HCFCs won't break down the ozone in the stratosphere, because they can be oxidized in the troposphere...
...want to boost the oxidizing power of the atmosphere. If tropospheric ozone levels had not risen over the past 100 years, we'd in trouble," Jacob says. "But at the same time we dump pollutants that need to be destroyed, we dump more ozone to destroy them...