Computer Science
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.338..490t&link_type=abstract
Nature (ISSN 0028-0836), vol. 338, April 6, 1989, p. 490-492. Research supported by NSF, U.S. Navy, and NASA.
Computer Science
108
Atmospheric Composition, Ice Clouds, Mesopause, Methane, Middle Atmosphere, Noctilucent Clouds, Carbon Dioxide, Ice Formation, Stratosphere, Water Vapor
Scientific paper
The possiblity is investigated that a substantial change has occurred in middle-atmospheric water vapor as a result of the increase in atmospheric methane over the past century and a half. It is shown from modeling of mesospheric ice-particle formation that noctilucent cloud brightness should be a sensitive indicator of the water content at the high-latitude summertime mesopause. From an examination of the historical record of noctilucent cloud occurrence, it is found that such clouds are absent from the record before 1885, a finding which is consistent with the hypothesis proposed in this paper.
Jensen Eric J.
Olivero John J.
Schroeder Wilfred
Thomas Gary E.
Toon Brian O.
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