The Equatorial Anomaly and Equatorial Spread F: Their Joint Dependence on Maximum Pre-reversal Drift Velocity Measured During Solar Maximum

Details The Equatorial Anomaly and Equatorial Spread F: Their Joint Dependence on Maximum Pre-reversal Drift Velocity Measured During Solar Maximum The Equatorial Anomaly and Equatorial Spread F: Their Joint Dependence on Maximum Pre-reversal Drift Velocity Measured During Solar Maximum

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa72b0537w&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA72B-0537

Computer Science

Sound

2415 Equatorial Ionosphere, 2437 Ionospheric Dynamics, 2439 Ionospheric Irregularities, 2447 Modeling And Forecasting

Scientific paper

The anomaly F layer electron density at 2100 LT (Ne) together with equatorial spread F (ESF) at 2 levels of bottomside spread F (BSSF) and macroscopic bubbles have been measured on each day of a solar maximum year by an array of ionosphere sounders located in the Western American sector. These measurements have been combined with the maximum pre-reversal vertical plasma drift velocity (ExB drift) measured by the Jicamarca incoherent scatter radar at the same longitude and also during solar maximum conditions. The result is that Ne increases as a linear function of ExB drift. During equinox months (Mar Apr Sep Oct) the relative occurrence of each level of ESF increases nearly linearly with anomaly Ne. Therefore ESF increases nearly linearly with ExB drift as a consequence of the dependence of Ne on ExB drift. Similarly during winter (May-Aug) the same nearly linear relations exist as in the equinox months, but at much reduced levels of Ne, ExB drift and ESF. In contrast, during summer (Nov-Feb), although Ne is a linear function of ExB drift, ESF is not, an indication of the effect of the reduced post-reversal drift velocity that prolongs ESF production.

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