Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46612 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Thermal and dynamic perturbations in the winter polar upper atmosphere associated with a major sudden stratospheric warming Thermal and dynamic perturbations in the winter polar upper atmosphere associated with a major sudden stratospheric warming Lukianova Renata Lukianova Renata Geophysical Center of the Russian Academy of Sciences, Moscow, Russia ru Geophysical Center of the Russian Academy of Sciences, Moscow, Russia ru 16 4 1 4 29 10 2021 https://rjes.ru/en/nauka/article/46612/view

During a major sudden stratospheric warming occurred in 2009 specific signatures of atmosphere-ionosphere coupling is observed in the vicinity the stratospheric polar night jet. Wind reversal from eastward to westward occurred at 80--100~km altitude. The magnitude of mesospheric cooling is comparable with the stratospheric warming $(\sim 50$~K) but the former decay faster than the latter. Deepening of the thermal inversion layer at the mesopause is observed during the peak of the mesospheric cooling. A shorter period atmospheric gravity wave occurrence in the ionosphere decays just after the mesospheric temperature reaches its minimum. The effect may be explained by selective filtering and increased turbulence near the mesopause.

During a major sudden stratospheric warming occurred in 2009 specific signatures of atmosphere-ionosphere coupling is observed in the vicinity the stratospheric polar night jet. Wind reversal from eastward to westward occurred at 80--100~km altitude. The magnitude of mesospheric cooling is comparable with the stratospheric warming $(\sim 50$~K) but the former decay faster than the latter. Deepening of the thermal inversion layer at the mesopause is observed during the peak of the mesospheric cooling. A shorter period atmospheric gravity wave occurrence in the ionosphere decays just after the mesospheric temperature reaches its minimum. The effect may be explained by selective filtering and increased turbulence near the mesopause.

 Polar stratosphere mesosphere atmospheric circulation sudden stratospheric warming Polar stratosphere mesosphere atmospheric circulation sudden stratospheric warming

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