NASA NTRS · 19760042084
Stratospheric aluminum oxide
Abstract
Balloons and U-2 aircraft were used to collect micrometer-sized stratospheric aerosols. It was discovered that for the past 6 years at least, aluminum oxide spheres have been the major stratospheric particulate in the size range from 3 to 8 micrometers. The most probable source of the spheres is the exhaust from solid-fuel rockets.
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Brownlee, D. E., Tomandl, D., Ferry, G. V.. 1976-03-26. Stratospheric aluminum oxide. https://ntrs.nasa.gov/citations/19760042084
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