Physics
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...102.6621r&link_type=abstract
Journal of Geophysical Research, Volume 102, Issue E3, p. 6621-6628
Physics
3
Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Volcanic Effects, Planetology: Solar System Objects: Extraterrestrial Materials, Planetology: Solar System Objects: Dust
Scientific paper
Platey grains of cubic Bi2O3, α-Bi2O3, and Bi2O2.75 nanograins were associated with chondritic porous interplanetary dust particles W7029C1, W7029E5, and 2011C2 that were collected in the stratosphere at 17-19 km altitude. Similar Bi oxide nanograins were present in the upper stratosphere during May 1985. These grains are linked to the plumes of several major volcanic eruptions during the early 1980s that injected material into the stratosphere. The mass of sulfur from these eruptions is a proxy for the mass of stratospheric Bi from which we derive the particle number densities (pm-3) for ``average Bi2O3 nanograins'' due to this volcanic activity and those necessary to contaminate the extraterrestrial chondritic porous interplanetary dust particles via collisional sticking. The match between both values supports the idea that Bi2O3 nanograins of volcanic origin could contaminate interplanetary dust particles in the Earth's stratosphere.
MacKinnon Ian D. R.
Rietmeijer Frans J. M.
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