The role of cometary and meteoritic matter in the genesis of noctilucent clouds

Details The role of cometary and meteoritic matter in the genesis of noctilucent clouds The role of cometary and meteoritic matter in the genesis of noctilucent clouds

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992avest..26...83l&link_type=abstract

Astronomicheskii Vestnik (ISSN 0320-930X), vol. 26, Jan.-Feb. 1992, p. 83-92. In Russian.

Astronomy and Astrophysics

Astronomy

1

Comets, Condensation Nuclei, Earth Atmosphere, Meteoritic Composition, Water, Atmospheric Moisture, Middle Atmosphere, Moisture Content, Water Vapor

Scientific paper

A global balance model of water of cometary origin in the atmosphere at altitudes of 60-140 km is presented. If the minicomets introduce into the earth's atmosphere (0.5-1) x 10 exp 6 t/day molecules of H2O, their relative concentration in the mesopause is about 0.0001, which is sufficient for water vapor condensation at a temperature of 160-170 K. Fine particles of interplanetary dust or the dust particles introduced by minicomets can be condensation nuclei. The main sources of water vapor are different in the troposphere, stratosphere, and mesopause.

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