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The Ionospheric response During 2013 Stratospheric Sudden Warming over East Asia Region
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  • Wang fei fei,
  • Shan xin jian,
  • Li Na,
  • Zhang hong bo,
  • Sheng dong sheng,
  • Sun shu ji,
  • Xu tong,
  • Tang ji
Wang fei fei
Information center China Research Institute of Radiowave Propagation

Corresponding Author:[email protected]

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Shan xin jian
Institute of Geology China Earthquake Administration
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Li Na
Information center China Research Institute of Radiowave Propagation
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Zhang hong bo
CETC
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Sheng dong sheng
CETC
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Sun shu ji
CETC
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Xu tong
CETC
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Tang ji
Institute of Geology China Earthquake Administration
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Abstract

Ionospheric response to sudden stratospheric warming (SSW) are not well understood. During the 2013 SSW, ionospheric disturbances were observed in eighteen stations on three meridional chains of 100°E, 110°E and 120°E ranging from 19.03°N to 49.21°N at latitudes over East Asia region. The TEC response showed evident semi-diurnal disturbance that enhancement in the morning and depletion in the afternoon. The maximum TEC increased by more than 220% on the chain 120°E. In addition, the semi-diurnal disturbance of TEC were enhanced and indicated evident latitudinal and longitudinal dependence. The wavelet spectra of semi-diurnal disturbance in TEC presented quasi-16 day planetary wave-like oscillations at middle latitudes and quasi-10 day planetary wave-like oscillations at low latitudes. Meanwhile, the zonal winds and meridional winds at altitudes of 92-100 km showed quasi-16 day planetary wave at Mohe located middle latitude and quasi-10 day planetary wave at Sanya located low latitude, which are agree with semi-diurnal disturbance of TEC. Especially, the 12-hour component of TEC showed a quasi-16 day periodic component at middle latitude and a quasi-10 day periodic component at low latitude, indicating that the modulated semi-diurnal tides may transmit these 10 day and 16 day planetary wave-like oscillations to the ionosphere. The coupling between the atmosphere and ionosphere may be strengthened by the quasi-16 day waves at middle latitude and quasi-10 day waves at low latitude. This can further confirm the PW-tide interaction theory during the 2013 SSW and it is of significance in the middle and low latitude ionospheric response to SSW.