𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Two-day oscillation of electron concentration in thelower ionosphere

✍ Scribed by Q.H. Zhou

Book ID
104407819
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
489 KB
Volume
60
Category
Article
ISSN
1364-6826

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✦ Synopsis

A strong two!day modulation in electron concentration was observed by the Arecibo incoherent scatter radar during January 10Ð17\ 0882\ in the altitude range between 74Ð83 km[ The modulation of the electron density and the altitude variation of the lower edge of the electron density enhancement were associated with a quasi two!day planetary wave observed in the winds[ On the days when the Lorentz force associated with the two!day wave pointed downward\ the ions were observed to penetrate to lower altitudes[ At 89 km\ the di}erence in electron concentration between consecutive days was about 3999:cm 2 [ Our analysis suggests that molecular ion transport can only account for less than 299:cm 2 enhancement for typical mesopause conditions[ The large enhancement in electron concentration is likely due to transport of metallic ions from higher altitudes[ Þ 0888 Elsevier Science Ltd[ All rights reserved[

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