Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p22c..05g&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P22C-05
Other
7894 Instruments And Techniques, 9810 New Fields (Not Classifiable Under Other Headings)
Scientific paper
Hunten (1980) described a model of a meteoric dust layer in the Earth's mesosphere, predicting densities of nanometer-sized dust particles of up to 1000/cc. In the past several years, measurements of dust (ice) particles of sizes on the order of 10 nm in NLC and PMSE have been made by both in-situ and ground-based instruments (Havnes, 2001, von Cossart, 1999). Evidence for the existence of nanometer-sized charged dust has also been found (Gelinas, 1998), however, for the most part, the mesospheric dust population remains a mystery. This dust population must certainly affect the mesosphere and lower ionosphere, as the predicted 1-nm dust density is of the same order as the nighttime plasma density at that altitude (near 90 km). In particular, mesospheric layering phenomena such as sporadic E and sporadic atom layers are likely candidates for a dust interaction, particularly at midlatitudes. Characterization of the Earth's mesospheric dust population is necessary before we can fully understand these types of layering phenomenon. In this presentation we discuss the problems associated with measuring mesospheric dust, and present several measurement techniques that show promise in near future.
Gelinas Lynette Jean
Kelley Michael C.
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