Ionospheric upwelling and the level of associated noise at solar minimum
Abstract 10 13 - 2 - 1 using the data during the European Incoherent Scatter Scientific Association (EISCAT) Svalbard Radar International Polar Year (IPY-ESR) 2007 campaign, which coincides with the solar minimum. The noise level in low-, medium- and high-flux upflows is investigated. We found that the noise level in high-flux upflow is about 93 %, while in the low and medium categories it is 62 % and 80 %, respectively. This shows that robust and stringent filtering techniques must be ensured when analysing incoherent data in order not to introduce bias to the result. Analysis reveals that the frequency of the low-flux upflow events is about 8 and 73 times the medium- and high-flux upflow events, respectively. Seasonal observation shows that the noise level in the upflow classes is predominantly high during winter. The noise is minimal in summer, with a notable result indicating occurrence of actual data above noise in the low-flux class. Moreover, the percentage occurrence of the noise level in the data increases with increasing flux strength, irrespective of the season. Further analysis reveals that the noise level in the local time variation peaked around 17:00–18:00 LT (local time) and minimum around 12:00 LT.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Ionospheric upwelling and the level of associated noise at solar minimum ; volume:42 ; number:2 ; year:2024 ; pages:349-354 ; extent:6
Annales geophysicae ; 42, Heft 2 (2024), 349-354 (gesamt 6)
- Creator
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David, Timothy Wemimo
Michael, Chizurumoke Michael
Wright, Darren
Talabi, Adetoro Temitope
Ajetunmobi, Abayomi Ekundayo
- DOI
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10.5194/angeo-42-349-2024
- URN
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urn:nbn:de:101:1-2408061452053.090835237668
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:53 AM CEST
Data provider
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Associated
- David, Timothy Wemimo
- Michael, Chizurumoke Michael
- Wright, Darren
- Talabi, Adetoro Temitope
- Ajetunmobi, Abayomi Ekundayo
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The VLF-induced ionospheric perturbations detected by DEMETER during solar minimum
Solar noise storms
Variability of ionospheric TEC during solar and geomagnetic minima (2008 and 2009): external high speed stream drivers
Stability of solar correction for calculating ionospheric trends
Solar activity effects in the ionospheric D region
Ionospheric response to solar EUV variations: Preliminary results
Polar ionospheric responses to solar wind IMF changes
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The Height‐Dependent Delayed Ionospheric Response to Solar EUV
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Additional flight delays and magnetospheric–ionospheric disturbances during solar storms
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The VLF-induced ionospheric perturbations detected by DEMETER during solar minimum
Solar noise storms
Variability of ionospheric TEC during solar and geomagnetic minima (2008 and 2009): external high speed stream drivers
Stability of solar correction for calculating ionospheric trends
Solar activity effects in the ionospheric D region
Ionospheric response to solar EUV variations: Preliminary results
Polar ionospheric responses to solar wind IMF changes
Upwelling ecosystems
The Height‐Dependent Delayed Ionospheric Response to Solar EUV
Ionospheric cusp flows pulsed by solar wind Alfvén waves