Abstract
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/cm 3. Our analysis suggeststhat molecular ion transport can only account for less than 300/cm 3 enhancement fortypical mesopause conditions. The large enhancement in electron concentration is likely due totransport of metallic ions from higher altitudes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Atmospheric and Solar-Terrestrial Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
