Computer Science
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000lpico.997...28f&link_type=abstract
Workshop on Extraterrestrial Materials from Cold and Hot Deserts, p. 28
Computer Science
Micrometeorites, Chemical Composition, Interplanetary Dust, Mass Distribution, Size Distribution, Stratosphere, Weathering, Antarctic Regions, Earth Atmosphere
Scientific paper
The largest interplanetary dust particles (IDPs) collected from the Earth's stratosphere overlap in size with the smallest micrometeorites collected from the polar ices. This size overlap, for particles from about 25 to 75 microns in diameter, offers the opportunity to compare particles that were, presumably, identical prior to their respective terrestrial residence, collection, and curation. Differences between the IDPs and the polar micrometeorites are likely to result from contamination or weathering in the respective environments of each particle. This size range from 25 to 75 microns is particularly interesting because the mass-frequency distribution for particles incident on the Earth's atmosphere is sharply peaked in the 10-6 to 10-5 gram mass range (particles a few hundred microns in diameter). Thus, the 25 to 75 micron diameter IDPs and polar micrometeorites are close in size to the peak in the mass-frequency distribution, and these particles are likely to reflect the composition of the bulk of the interplanetary material accreting onto the Earth.
Flynn George James
Kloeck Wolfgang
Sutton Richard S.
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