In situ measurement of the aerosol size distribution in stratospheric solid rocket motor exhaust plumes

Details In situ measurement of the aerosol size distribution in stratospheric solid rocket motor exhaust plumes In situ measurement of the aerosol size distribution in stratospheric solid rocket motor exhaust plumes

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..819r&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 7, p. 819-822

Physics

7

Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry

Scientific paper

The concentration and size distribution of aerosol in the stratospheric exhaust plumes of two Space Shuttle rockets and one Titan IV rocket were measured using a two component aerosol sampling system carried aboard a WB-57F aircraft. Aerosol size distribution in the 0.01 μm to 4 μm diameter size range was measured using a two component sampling system. The measured distributions display a trimodal form with modes near 0.005 μm, 0.09 μm, and 2.03 μm and are used to infer the relative mass fractionation among the three modes. While the smallest mode has been estimated to contain as much as 10% of the total mass of SRM exhaust alumina, we find show that the smallest mode contains less than 0.05% of the alumina mass. This fraction is so small so as to significantly reduce the likelihood that heterogeneous reactions on the SRM alumina surfaces could produce a significant global impact on stratospheric chemistry.

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