Some characteristics of large-scale travelling ionospheric disturbances and a relationship between the F-2 layer height rises of these disturbances and equatorial pre-sunrise events

Bowman, G. G. and Mortimer, I. K. (2010) Some characteristics of large-scale travelling ionospheric disturbances and a relationship between the F-2 layer height rises of these disturbances and equatorial pre-sunrise events. Annales Geophysicae, 28 7: 1419-1430. doi:10.5194/angeo-28-1419-2010


Author Bowman, G. G.
Mortimer, I. K.
Title Some characteristics of large-scale travelling ionospheric disturbances and a relationship between the F-2 layer height rises of these disturbances and equatorial pre-sunrise events
Journal name Annales Geophysicae   Check publisher's open access policy
ISSN 0992-7689
1432-0576
Publication date 2010
Sub-type Article (original research)
DOI 10.5194/angeo-28-1419-2010
Open Access Status DOI
Volume 28
Issue 7
Start page 1419
End page 1430
Total pages 12
Place of publication Goettingen, Germany
Publisher Copernicus GmbH
Collection year 2011
Language eng
Formatted abstract
Initially some characteristics of large-scale travelling ionospheric disturbances (LS-TIDs) have been discussed briefly particularly as reported in the early literature. These discussions also involve the literature on the generation of LS-TIDs at times of geomagnetic bays. Secondly, the possibility that LS-TIDs may be responsible for the F2 layer equatorial pre-sunrise height rises is investigated. Tabulations at hourly intervals of h'F at Huancayo and Washington for a Rz max period (1957-1960) have been used to identify height rises. For a three-hour interval at Huancayo h'F levels equal to or greater than 40 km of medians are used to identify the pre-sunrise height rises. Also height rises at Washington, which occurred earlier than those at Huancayo, have been considered for evidence of travelling disturbances. For 40 events analysed using geomagnetic bays and Washington height rises, a few hours before they occur at Huancayo, indicate the statistical significance of an association with LS-TIDs. Similar results of statistical significance have been obtained using Washington events and bays on average 34 h before 46 Huancayo events. These delays ranged from 29 h to 38 h. The results indicate that bays which occur the day before are responsible for LS-TIDs which encircle the earth. © Author(s) 2010.
Keyword Ionosphere
Equatorial ionosphere
Ionospheric disturbances
Mid-latitude ionosphere
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2011 Collection
 
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Created: Sun, 22 Aug 2010, 00:13:47 EST