Antarctic mesospheric clouds formed from space shuttle exhaust

Physics

Scientific paper

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Atmospheric Composition And Structure: Airglow And Aurora, Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Clouds And Aerosols, Atmospheric Processes: Thermospheric Dynamics (0358)

Scientific paper

New satellite observations reveal lower thermospheric transport of a space shuttle exhaust plume into the southern hemisphere two days after a January, 2003 launch. A day later, ground-based lidar observations in Antarctica identify iron ablated from the shuttle's main engines. Additional satellite observations of polar mesospheric clouds (PMCs) show a burst that constitutes 10-20% of the PMC mass between 65-79°S during the 2002-2003 season, comparable to previous results for an Arctic shuttle plume. This shows that shuttle exhaust can be an important global source of both PMC formation and variability.

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