Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/10671
DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2018-01-10T18:30:36Z | en |
dc.date.available | 2018-01-10T18:30:36Z | en |
dc.date.issued | 2018-01 | en |
dc.identifier.uri | http://hdl.handle.net/2122/10671 | en |
dc.description.abstract | Bottom side electron density profiles for two stations at the southern crest of the Equatorial Ionization Anomaly (EIA), Sao José dos Campos (23.1°S, 314.5°E, dip latitude 19.8°S; Brazil) and Tucuman (26.9°S, 294.6°E, dip latitude 14.0°S; Argentina), located at similar latitude and separated by only 20° in longitude, have been compared during equinoctial, winter and summer months under low (year 2008, minimum of the solar cycle 23/24) and high solar activity (years 2013–2014, maximum of the solar cycle 24) conditions. An analysis of parameters describing the bottom side part of the electron density profile, namely the peak electron density NmF2, the height hmF2 at which it is reached, the thickness parameter B0 and the shape parameter B1, is carried out. Further, a comparison of bottom side profiles and F-layer parameters with the corresponding outputs of IRI-2012 and NeQuick2 models is also reported. The variations of NmF2 at both stations reveal the absence of semi-annual anomaly for low solar activity (LSA), evidencing the anomalous activity of the last solar minimum, while those related to hmF2 show an uplift of the ionosphere for high solar activity (HSA). As expected, the EIA is particularly visible at both stations during equinox for HSA, when its strength is at maximum in the South American sector. Despite the similar latitude of the two stations upon the southern crest of the EIA, the anomaly effect is more pronounced at Tucuman than at Sao José dos Campos. The differences encountered between these very close stations suggest that in this sector relevant longitudinal-dependent variations could occur, with the longitudinal gradient of the Equatorial Electrojet that plays a key role to explain such differences together with the 5.8° separation in dip latitude between the two ionosondes. Furthermore at Tucuman, the daily peak value of NmF2 around 21:00 LT during equinox for HSA is in temporal coincidence with an impulsive enhancement of hmF2, showing a kind of ‘‘elastic rebound” under the action of the EIA. IRI-2012 and NeQuick2 bottom side profiles show significant deviations from ionosonde observations. In particular, both models provide a clear underestimation of the EIA strength at both stations, with more pronounced differences for Tucuman. Large discrepancies are obtained for the parameter hmF2 for HSA during daytime at Sao José dos Campos, where clear underestimations made by both models are observed. The shape parameter B0 is quite well described by the IRI-2012 model, with very good agreement in particular during equinox for both stations for both LSA and HSA. On the contrary, the two models show poor agreements with ionosonde data concerning the shape parameter B1. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Advances in Space Research | en |
dc.relation.ispartofseries | /61 (2018) | en |
dc.title | Bottom side profiles for two close stations at the southern crest of the EIA: Differences and comparison with IRI-2012 and NeQuick2 for low and high solar activity | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 295-315 | en |
dc.identifier.doi | 10.1016/j.asr.2017.10.007 | en |
dc.description.obiettivoSpecifico | 2A. Fisica dell'alta atmosfera | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Perna, L. | en |
dc.contributor.author | Venkatesh, K. | en |
dc.contributor.author | Pillat, V. G. | en |
dc.contributor.author | Pezzopane, Michael | en |
dc.contributor.author | Fagundes, P. R. | en |
dc.contributor.author | Ezquer, R. G. | en |
dc.contributor.author | Cabrera, M. A. | en |
dc.contributor.department | Universidade do Vale do Paraiba (UNIVAP), IP&D, Sa˜o Jose´ dos Campos, SP, Brazil | en |
dc.contributor.department | Universidade do Vale do Paraiba (UNIVAP), IP&D, Sa˜o Jose´ dos Campos, SP, Brazil | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | en |
dc.contributor.department | CIASUR, Facultad Regional Tucuma´ n, Universidad Tecnolo´ gica Nacional, Argentina | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Universidade do Vale do Paraíba (UNIVAP), São José dos Campos, Brazil | - |
crisitem.author.dept | Laboratorio de FIsica e Astronomia, Universidade do Vale do Paraiba (UNIVAP) | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
crisitem.author.dept | Laboratorio de Telecomunicaciones, DEEC, FACET, Universidad Nacional de Tucumán, Tucumán, Argentina | - |
crisitem.author.orcid | 0000-0003-4183-3896 | - |
crisitem.author.orcid | 0000-0002-5849-0597 | - |
crisitem.author.orcid | 0000-0001-5800-2322 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
2018_AdvancesSpaceResearch_Bottom_NeQuick_IRI.pdf | full_paper | 7.7 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
20
6
checked on Feb 10, 2021
Page view(s) 50
235
checked on Apr 20, 2024
Download(s)
8
checked on Apr 20, 2024