Index A to Z You are here: home | sciences | our atmosphere Our Atmosphere A tenuous layer of gas separating the Earth from the vacuum of space, the atmosphere plays a crucial role in the global ecosystem. Researchers are getting a better handle on the mechanisms governing the atmosphere and its interaction with the oceans, the ecosystem and cosmic radiation. Ozone and air pollution SCISAT – From dawn to twilight Measuring atmospheric pollutants with MOPITT OSIRIS – At the forefront of the study of ozone depletion MANTRA – Giant balloon probes the atmosphere above Saskatchewan The wind and the clouds CloudSat – Looking at clouds in 3-D WINDII – 12 years measuring winds of the upper atmosphere         Updated: 2005/04/07 Important Notices