Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
1997
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=56836205 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- The ionospheric F2 region winter anomaly and its dependence on solar activity in the northern and southern hemispheres Ana Martínez Pulido Eduardo Francisco Garat Ciencias de la Tierra F2 region ionosphere Winter anomaly trapped particles Data from two ionospheric sounders each from the northern and southernhemisphere, are used for a statistical analysis of foF2 monthly medians forsummer and winter and high and low solar activity. The winter anomaly is always present in the northern hemisphere and only occasionally in the southern one.Statistical results suggest that the F2 region behaviour is different from onehemisphere to the other. In the northern hemisphere explanatory variability is 82to 85% at night and 60 to 83% at noon. At night, in the southern hemisphere, theexplained variability oscillates between 63 and 77%. However, at noon, itbecomes necessary to look for other explicative variables since only 28 to 45% ofthe variability of DfoF2(12) is explained. These results may be due to the SouthAtlantic geomagnetic anomaly, lowering the geomagnetic mirror points andenhancing trapped particle precipitation in the denser atmosphere. Thus, heatingshould be larger in the South Atlantic region, inhibiting convection from thenorthern summer to the southern winter 1997 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56836205 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.36