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| Titel |
Electron loss and meteoric dust in the mesosphere |
| VerfasserIn |
M. Friedrich, M. Rapp, T. Blix, U.-P. Hoppe, K. Torkar, S. Robertson, S. Dickson, K. Lynch |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 30, no. 10 ; Nr. 30, no. 10 (2012-10-05), S.1495-1501 |
| Datensatznummer |
250017278
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1495-2012.pdf |
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| Zusammenfassung |
| The ionosphere is always assumed to contain equal numbers of positive and
negative charges in a given volume (quasineutrality). Hence fewer electrons
than positive charges are an indication of negative charges other than
electrons. Theories predict and in-situ mass spectrometer measurements confirmed
that these negative charges are negative ions, but recent experimental
results suggest that other scavengers of free electrons can also be active
in the mesosphere. Outside the polar summer mesosphere this additional
removal of electrons is today believed to be due to meteoric dust, which
maximises in the mesosphere. Data predominantly from the recent ECOMA
flights are used to test this presumption. Six sounding rockets carried
different dust detectors, as well as probes for electrons and ions. With
such an instrumental ensemble one can assess whether indeed the existence of
meteoric dust removes more electrons than would be expected from gas phase
ion chemistry alone. Other factors potentially impacting on electron removal
are also discussed in the paper. |
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