Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991avest..25..350l&link_type=abstract
Astronomicheskii Vestnik (ISSN 0320-930X), vol. 25, May-June 1991, p. 350-363. In Russian.
Astronomy and Astrophysics
Astronomy
2
Aerosols, Cosmic Dust, Meteorite Collisions, Meteoroid Hazards, Upper Atmosphere, Atmospheric Composition, Collision Avoidance, Meteor Trails, Micrometeoroids
Scientific paper
Hypotheses on 'minicomets' and on the few-percent content of high molecular organic components in their snow nuclei are examined. They show the physical mechanism of the formation of the earth's dust cloud with a dust concentration 2 to 3 orders higher than the background content in interplanetary space. The influx of minicomets is the main source of oxygen through the whole column of the atmosphere, and of water in the thermosphere, mesosphere, and upper stratosphere. It is found that swarms of minicomets may exist in the orbits of large comets, an encounter with which results in a short-term increase in the dust content in the upper atmosphere and circumterrestrial space.
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