Forcing of the ionosphere from above and below during the Arctic winter of 2005/2006

Mukhtarov, Plamen; Andonov, B.; Borries, Claudia; Pancheva, D.; Jakowski, N.

doi:10.1016/j.jastp.2009.11.008

Cited by 25 publications

(15 citation statements)

References 51 publications

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“…This further supports our suggestion that periodic variations reported in this study at least partially can be related to lunar tides that are consistently present in the atmosphere and become strongly enhanced 128 X. H. Mo et al: Quasi-16-day periodic meridional movement of the EIA during SSW events (Pedatella and Forbes, 2010;Fejer et al, 2010;Fejer, 2011;Yamazaki, 2013). Mukhtarov et al (2010) used SABER/TIMED temperature and solar wind velocity data to identify a zonally symmetric oscillation with 14-day period in ionosphere that was considered to be of solar origin and a 18-day westwards propagating planetary wave with zonal wavenumber 1 in stratosphere and MLT region at 50 • N. Vineeth et al (2007) showed the obvious quasi-16-day periodic variation in equatorial mesopause temperature observed in the Indian sector during 2005/2006 SSW event, and their following studies showed that the obvious quasi-16-day periodic planetary wave in tropic stratosphere occurred about 60 days ahead of the 2005/2006 major SSW (Vineeth et al, 2010). In addition, the enhanced lunar tide during SSW should not be ruled out as the possible reason for the 14-day periodic variation in EEJ index and meridional movement of EIA crest shown in Figs.…”

Section: Discussionsupporting

confidence: 89%

“…The 9-day period presented in Dst and Kp was attributed to periodic high-speed streams in solar wind (Lei et al, 2008). Mukhtarov et al (2010) gave more detailed analysis on these planetary wave type responses in the thermosphere/ionosphere system to forcing from above and below during the same period. They concluded that the observed global ionospheric zonally symmetric oscillations with periods of 9, 14 and 24-27 days were of solar origin.…”

Section: Resultsmentioning

confidence: 99%

“…Fagundes et al (2005) A series of recent reports concerning ionospheric perturbations associated with lower atmospheric forcing have focused on sudden stratospheric warming (SSW). These reports mainly discussed the features of the ionospheric variation in low-latitude region, the possible connections between the state of the atmosphere at low latitude and high latitude, and the possible connections between the ionosphere and MLT region related to SSW Goncharenko et al, 2010a, b;Mukhtarov et al, 2010;Pedatella and Forbes, 2009;Vineeth et al, 2007Vineeth et al, , 2010. Using the global reanalysis data of atmospheric temperature and wind provided by the National Centers for Environmental Prediction (NCEP) and National Center for Atmospheric Research (NCAR), Vineeth et al (2010) found an enhanced planetary wave (PW) activity of quasi-16-day periodicity in the stratosphere propagating from the Equator to the North Pole during several SSW years.…”

Section: Introductionmentioning

confidence: 99%

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Quasi-16-day periodic meridional movement of the equatorial ionization anomaly

Zhang

Гончаренко

et al. 2014

Ann. Geophys.

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Abstract. Based on the daytime location of the equatorial ionization anomaly (EIA) crest derived from GPS observations at low latitude over China during the 2005-2006 stratospheric sudden warming (SSW), a quasi-16-day periodic meridional movement of EIA crest with the maximum amplitude of about 2 degrees relative to the average location of EIA crest has been revealed. In addition, periodic variations that are in phase with the meridional EIA movement are also revealed in the equatorial electrojet (EEJ) and F2 layer peak height (hmF2) over Chinese ionosonde stations Haikou and Chongqing. The quasi-16-day periodic component in Dst index is weak, and the 16-day periodic component does not exist in F10.7 index. Such large-scale periodic meridional movement of EIA crest is likely related to the globally enhanced stratospheric planetary waves coupled with anomalous stratospheric zonal wind connected with SSW. In addition, such large-scale periodic movement of EIA should be global, and can affect the ionospheric morphology around the low-latitude belt near the EIA region. Further case analysis, simulation and theoretical studies must proceed in order to understand the periodic movements of EIA connected with the different periodic atmospheric variations.

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Section: Discussionsupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quasi-16-day periodic meridional movement of the equatorial ionization anomaly

Zhang

Гончаренко

et al. 2014

Ann. Geophys.

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“…Hence, the recurrent geomagnetic activity leads to changes in ionospheric electron density and TEC. Recently, oscillations at periods of 7 and 9 days during 2005 and 2006 in global mean GPS TEC were correlated with recurrent solar wind HSSs, related to coronal holes distributed on the Sun [ Lei et al , 2008a; Pedatella et al , 2010; Mukhtarov et al , 2010]. More recently, Tulasi Ram et al [2010a, 2010b], Zhang et al [2010], Liu et al [2010], and Mukhtarov and Pancheva [2012] have used global electron density profiles from satellite measurements to investigate the ionospheric response to recurrent geomagnetic activity at different latitudes and altitudes.…”

Section: Introductionmentioning

confidence: 99%

Response of low‐latitude ionosphere to medium‐term changes of solar and geomagnetic activity

Kutiev¹,

Otsuka²,

Pancheva³

et al. 2012

J. Geophys. Res.

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[1] The paper presents the medium-term quasi periodic ($9-27 day) response of middle and low-latitude ionosphere to solar [F10.7) and geomagnetic (Kp-index) forcing. The ionospheric response is examined by wavelet analysis of the relative deviations of TEC over Japan for the period of time 2000-2008. It is found that the $27-day rTEC oscillations correlate well with the same oscillations of the solar index F10.7 particularly in the solar maximum and its early declining phase (2001)(2002)(2003)(2004)(2005). During the declining phase of solar activity (for example, year of 2005) the Kp-index variability exhibits additionally strong oscillations with periods 13.5-and 9-days. Similar oscillations are found in rTEC as well but they do not follow the geomagnetic forcing as faithfully as those associated with F10.7. During solar minimum the quasi periodic rTEC variability is shaped mainly by the recurrent geomagnetic activity. An attempt is made to investigate the latitudinal dependence of the $9-27-day rTEC response over Japan as well as the phase relationship between the forcing and response.

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“…This is unsurprising, since the dayside hemisphere at these altitudes is exposed to variable heating by solar ultraviolet radiation, and at high latitudes there is also highly variable deposition of energy and momentum from the solar wind via the magnetosphere. However, there has also been much recent interest in the extent to which thermospheric and ionospheric variability are driven by short‐term perturbations (such as waves and tides) that propagate upward from atmospheric layers below [e.g., Rishbeth and Mendillo , 2001; Mendillo et al , 2002; Kazimirovsky , 2002; Laštovička , 2006; Mukhtarov et al , 2010].…”

Section: Introductionmentioning

confidence: 99%

Thermospheric temperatures above Poker Flat, Alaska, during the stratospheric warming event of January and February 2009

Conde¹,

Nicolls²

2010

J. Geophys. Res.

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[1] We report observations of neutral and ion temperatures at approximately 240 km altitude above Poker Flat, Alaska, taken during the stratospheric warming event of January and February 2009. Neutral temperatures were recorded by a single-etalon Fabry-Perot spectrometer observing the nighttime airglow and aurora at 630 nm wavelength, whereas ion temperatures were obtained with the Poker Flat Incoherent Scatter Radar, mostly during daylight. Neutral and ion temperatures generally tracked each other closely; both data sets exhibited a similar overall seasonal trend during January to April 2009 and even showed similar short-term day-to-day fluctuations. Further, the daily fluctuations correlated highly with geomagnetic activity. Both the short-term temperature fluctuations and their overall seasonal trend matched expectations based on the MSIS model evaluated for this period at hourly intervals. A cooling response was seen in neutral temperature over a 2-3 week period during the main phase of the stratospheric warming. The magnitude of this cooling was around 50 K relative to the seasonal trend. A corresponding signature was also discernible in the ion temperatures, although it was less prominent than the neutral response. This was largely because the cooling was masked by ion temperature perturbations driven by magnetic activity. The strength of the response in ion temperature was observed to depend on the local time of the observations, which is consistent with results presented previously.

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Forcing of the ionosphere from above and below during the Arctic winter of 2005/2006

Cited by 25 publications

References 51 publications

Quasi-16-day periodic meridional movement of the equatorial ionization anomaly

Quasi-16-day periodic meridional movement of the equatorial ionization anomaly

Response of low‐latitude ionosphere to medium‐term changes of solar and geomagnetic activity

Thermospheric temperatures above Poker Flat, Alaska, during the stratospheric warming event of January and February 2009

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