Quote

In contrast to the troposphere, the stratosphere is extremely dry and practically cloudless - the concentration of water vapor is measured in parts per million and is, in fact, comparable to that of ozone.

There's a lot to do in space. I want to learn more about the greenhouse effect on Venus, about whether there was life on Mars, about the environment in which Earth and the Sun is immersed, the behavior of the Sun.

The science is clear that there is an increase in the amount of CO2 in the atmosphere. What is not clear from the science is how much of that increase is caused by human activity; and what also is not clear is what impact those increases have on the climatic cycle.

My special fascination has been to understand better the world of chemistry and its complexities.

I had a great chemistry teacher and found it really interesting to learn how things are made up and how they work.

The atmosphere is great for people - it allows us to survive - but it's a real headache for astronomers.

One of the very rewarding aspects of my work has been the interaction with a superb group of colleagues and friends in the atmospheric sciences community.

I try to show the public that chemistry, biology, physics, astrophysics is life. It is not some separate subject that you have to be pulled into a corner to be taught about.

One of the most ephemeral and important things is atmosphere and tone and it's very hard to put your finger on what creates that.

In my lab, we're interested in the transition from chemistry to early biology on the early earth.