Midlatitude ionospheric changes to four great geomagnetic storms of solar cycle 23 in Southern and Northern Hemispheres
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00472207" target="_blank" >RIV/68378289:_____/16:00472207 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/2016SW001516" target="_blank" >http://dx.doi.org/10.1002/2016SW001516</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2016SW001516" target="_blank" >10.1002/2016SW001516</a>
Alternative languages
Result language
angličtina
Original language name
Midlatitude ionospheric changes to four great geomagnetic storms of solar cycle 23 in Southern and Northern Hemispheres
Original language description
This paper presents an investigation of ionospheric response to great (Dst 350 nT) geomagnetic storms that occurred during solar cycle 23. The storm periods analyzed are 29 March to 2 April 2001, 27–31 October 2003, 18–23 November 2003, and 6–11 November 2004. Global Navigation Satellite System, total electron content (TEC), and ionosonde critical frequency of F2 layer (foF2) data over Southern Hemisphere (African sector) and Northern Hemisphere (European sector) midlatitudes were used to study the ionospheric responses within 15°E–40°E longitude and 31° to 46° geomagnetic latitude. Midlatitude regions within the same longitude sector in both hemispheres were selected in order to assess the contribution of the low-latitude changes especially the expansion of equatorial ionization anomaly (EIA) also called the dayside ionospheric superfountain effect during these storms. In all storm periods, both negative and positive ionospheric responses were observed in both hemispheres. Negative ionospheric responses were mainly due to changes in neutral composition, while the expansion of the EIA led to pronounced positive storm effects at midlatitudes for some storm periods. In other cases (e.g., 29 October 2003), penetration electric fields, EIA expansion, and large-scale traveling ionospheric disturbances were found to be present during the positive storm effect at midlatitudes in both hemispheres. An increase in TEC on the 28 October 2003 was because of the large solar flare with previously determined intensity of X45 5.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DG - Atmospheric sciences, meteorology
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP209%2F12%2F2440" target="_blank" >GAP209/12/2440: Troposphere-ionosphere coupling and its impact on ionospheric variability</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Space Weather
ISSN
1542-7390
e-ISSN
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Volume of the periodical
14
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
1155-1171
UT code for WoS article
000393341400006
EID of the result in the Scopus database
2-s2.0-85007495659