Physics
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jastp..60.1669z&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 60, Issue 17, p. 1669-1677.
Physics
11
Scientific paper
A strong two-day modulation in electron concentration was observed by the Areciboincoherent scatter radar during January 21-28, 1993, in the altitude range between 85-94 km.The modulation of the electron density and the altitude variation of the lower edge of the electrondensity 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, theions were observed to penetrate to lower altitudes. At 90 km, the difference in electronconcentration between consecutive days was about 4000/cm3. Our analysis suggeststhat molecular ion transport can only account for less than 300/cm3 enhancement fortypical mesopause conditions. The large enhancement in electron concentration is likely due totransport of metallic ions from higher altitudes.
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