Observations of daytime F2-layer stratification under the southern crest of the equatorial ionization anomaly region

Details Observations of daytime F2-layer stratification under the southern crest of the equatorial ionization anomaly region Observations of daytime F2-layer stratification under the southern crest of the equatorial ionization anomaly region

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11204302f&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue A4, CiteID A04302

Computer Science

Sound

15

Ionosphere: Ionospheric Dynamics, Ionosphere: Wave Propagation (0689, 3285, 4275, 4455, 6934), Ionosphere: Equatorial Ionosphere, Ionosphere: Ionosphere/Atmosphere Interactions (0335), Ionosphere: Instruments And Techniques

Scientific paper

Ionospheric vertical sounding observations are being carried out at Sao Jose dos Campos (23.2°S, 45.9°W dip latitude 17.6°S), Brazil, under the southern crest of the equatorial ionization anomaly (EIA) since August 2000. In this paper, we present and discuss the observations of daytime F2-layer stratification near the crest of EIA, for the first time, under magnetically quiet high solar activity conditions. Three examples and a year of statistics are presented. The F2-layer stratification and F3-layer were observed between 10:40 and 11:45 UT on 31 December 2000, between 13:30 and 14:30 UT on 1 January 2001, and between 13:15 and 15:15 UT on 11 February 2001. The statistics during September 2000 to August 2001 shows that the F3-layer occurs only for 66 days (18% occurrence), and it occurs only during September-February (spring-summer), with maximum occurrence in September-October and longest duration in February. The F2-layer stratification seems to be associated with gravity waves (GWs), which have periods of about 30-60 min, downward phase velocities of about 60-140 m/s, and vertical wavelengths of about 200-500 km. The presence of powerful gravity waves in a vertically extended F-layer seems to stratify the F2-layer and produce the F3-layer. Because the stratifications are observed during geomagnetically quiet periods, the source of the gravity waves are most likely to be associated with local tropospheric disturbances and not with high-latitude disturbances.

Affiliated with

Also associated with

No associations

Rating

Observations of daytime F2-layer stratification under the southern crest of the equatorial ionization anomaly region 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 Observations of daytime F2-layer stratification under the southern crest of the equatorial ionization anomaly region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of daytime F2-layer stratification under the southern crest of the equatorial ionization anomaly region will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1083733