Delayed traveling ionospheric disturbances, especially in equatorial regions, following geomagnetic activity

Details Delayed traveling ionospheric disturbances, especially in equatorial regions, following geomagnetic activity Delayed traveling ionospheric disturbances, especially in equatorial regions, following geomagnetic activity

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ep%26s...55..483b&link_type=abstract

Earth, Planets and Space, Volume 55, p. 483-492.

Computer Science

Scientific paper

For the Western-Pacific region spread-F has been found to occur with delays after geomagnetic activity (GA) ranging from 5 to 10 days as station groups are considered from low midlatitudes to equatorial regions. The statistical (superposed-epoch) analyses also indicate that at the equator the spread-F, and therefore associated medium-scale traveling ionospheric disturbances (MS-TIDs) occur with additional delays around 16, 22 and 28 days representing a 6-day modulation of the delay period. These results are compared with similar delays, including the modulation, for D-region enhanced hydroxyl emission (Shefov, 1969). It is proposed that this similarity may be explained by MS-TIDs influencing both the F and D regions as they travel. Long delays of over 20 days are also found near the equator for airglow-measured MS-TIDs (Sobral et al., 1997). These are recorded infrequently and have equatorward motions, while normally eastward motions are measured at the equator. Also in midlatitudes D-region absorption events have been shown (statistically) to have similar long delays after GA. It is suggested that atmospheric gravity waves and associated MS-TIDs may be generated by some of the precipitations responsible for the absorption. The recording of the delayed spread-F events depends on the GA being well below the average levels around sunset on the nights of recording. This implies that lower upper-atmosphere neutral particle densities are necessary.

Affiliated with

Also associated with

No associations

Rating

Delayed traveling ionospheric disturbances, especially in equatorial regions, following geomagnetic activity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Delayed traveling ionospheric disturbances, especially in equatorial regions, following geomagnetic activity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delayed traveling ionospheric disturbances, especially in equatorial regions, following geomagnetic activity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1668254