The present paper studies the perturbations in an equatorial ionization anomaly (EIA) region during the Southern Hemisphere (SH) sudden stratospheric warming (SSW) of 2002, using the location of EIA crests derived from global positioning system (GPS) station observations, the total electron content (TEC) obtained by the International GNSS (global navigation satellite system) Service (IGS) global ionospheric TEC map (GIMs) and the equatorial electrojet (EEJ) estimated by the geomagnetic field in the Asian sector. The results indicate the existence of an obvious quasi-10 d periodic oscillation in the location and TEC of the northern and southern EIA crest. An eastward phase progression of the quasi-10 d wave producing the SH SSW of 2002 is also identified in polar stratospheric temperature. Previous studies have shown that a strong quasi-10 d planetary wave with zonal wave numbers s = 1 extended from the lower stratosphere to the mesosphere and lower thermosphere during the SH SSW of 2002 (Palo et al., 2005). Moreover, the EEJ driven by the equatorial zonal electric field exhibits quasi-10 d oscillation, suggesting the enhanced quasi-10 d planetary wave associated with SSW penetrates into the ionosphere E region and produces oscillation in the EIA region through modulating the E-region electric fields. Our results reveal some newer features of ionospheric variation that have not been reported during Northern Hemisphere (NH) SSWs.
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Univ Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
Natl Ctr Atmospher Res, High Altitude Observ, POB 3000, Boulder, CO 80307 USAUniv Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
Wang, J. C.
Palo, S. E.
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Univ Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USAUniv Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
Palo, S. E.
Forbes, J. M.
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Univ Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USAUniv Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
Forbes, J. M.
Marino, J.
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Univ Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USAUniv Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
Marino, J.
Moffat-Griffin, T.
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British Antarctic Survey, Cambridge, EnglandUniv Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
Moffat-Griffin, T.
Mitchell, N. J.
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British Antarctic Survey, Cambridge, England
Univ Bath, Dept Elect & Elect Engn, Bath, Avon, EnglandUniv Colorado, Ann & HJ Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA
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Inst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, BrazilInst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, Brazil
Paes, R. R.
Batista, I. S.
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Inst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, BrazilInst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, Brazil
Batista, I. S.
Candido, C. M. N.
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Inst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, BrazilInst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, Brazil
Candido, C. M. N.
Jonah, O. F.
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Inst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, BrazilInst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, Brazil
Jonah, O. F.
Santos, P. C. P.
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Inst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, BrazilInst Nacl Pesquisas Espaciais, Div Aeron, BR-12201 Sao Jose Dos Campos, Brazil
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Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
Gan, Q.
Oberheide, J.
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Department of Physics and Astronomy, Clemson University, Clemson,SC, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
Oberheide, J.
Goncharenko, L.
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MIT Haystack Observatory, Westford,MA, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
Goncharenko, L.
Qian, L.
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High Altitude Observatory, National Center for Atmospheric Research, Boulder,CO, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
Qian, L.
Yue, J.
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Goddard Space Flight Center, NASA, Washington,DC, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
Yue, J.
Wang, W.
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High Altitude Observatory, National Center for Atmospheric Research, Boulder,CO, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
Wang, W.
McClintock, W.E.
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Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
McClintock, W.E.
Eastes, R.W.
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Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United StatesLaboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder,CO, United States
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Univ La Reunion, CNRS, UMR 8105, Lab Atmosphere & Cyclones, St Denis 97715 9, Reunion, FranceSouth African Natl Space Agcy, POB 32, ZA-7200 Hermanus, South Africa
Bencherif, H.
Malinga, S.
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South African Natl Space Agcy, POB 32, ZA-7200 Hermanus, South AfricaSouth African Natl Space Agcy, POB 32, ZA-7200 Hermanus, South Africa