Two-thirds of Earth's atmosphere resides over the oceans, far from land. While satellites in space collect data to measure the major gases, it takes a flight over this area to find out what's really happening in the chemistry of the air above the oceans. See how our Atmospheric Tomography flights survey this area: http://go.nasa.gov/2IU4raH | NASA - National Aeronautics and Space Administration

composition of the atmosphere | Students of Geography