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- W14650385 abstract "A detailed heterogeneous ion-chem. model is used to compute the charged and neutral dust concns. in the mesosphere and lower thermosphere (80-96 km). In the model various modes of dust charging are considered including the process of multiple charging of dust. Pos. charged dust particles are singly charged irresp. of their size, whereas multiple neg. charges can be found on large sized (radius r) dust particles (r » 1 nm). Below about 83 km photoionization of dust dominates over collisional pos. charging of dust (attachment of pos. ions to neutral dust), whereas collisional neg. charging of dust (attachment of electrons and neg. ions to dust) dominates over photodetachment in the entire height range of interest. The dust contours show layered structure with the lowest layer occurring at the Noctilucent Cloud height, while the uppermost peak coinciding with the altitude where metal ion layer exists. Further, the wave structure in the dust contours indicates the turbulence characteristics of the mesopause region. The results are discussed in the light of relevant theor. and exptl. information available in the literature about the mesospheric dust. The effects of possible ozone enhancement and mesospheric cooling on the model computed dust densities are also discussed. The results emphasize the importance of including the mesospheric dust, and hence the importance of heterogeneous ion chem., in the model studies of the mesosphere. [on SciFinder(R)]" @default.
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- W14650385 date "1997-01-01" @default.
- W14650385 modified "2023-09-27" @default.
- W14650385 title "A heterogeneous ion-chemical model for the upper mesosphere." @default.
- W14650385 hasPublicationYear "1997" @default.
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