Articles | Volume 39, issue 4
https://doi.org/10.5194/angeo-39-769-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-39-769-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
27 Aug 2021
Regular paper |
| 27 Aug 2021
| 27 Aug 2021
Heavy rainfall, floods, and flash floods influenced by high-speed solar wind coupling to the magnetosphere–ionosphere–atmosphere system
Physics Department, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
Vojto Rušin
Astronomical Institute, Slovak Academy of Sciences, 059 60
Tatranská Lomnica, Slovakia
Emil A. Prikryl
Northern Ontario School of Medicine, Thunder Bay, ON P7B 5E1, Canada
Pavel Šťastný
Climatological Service Department, Slovak Hydrometeorological Institute, 833 15 Bratislava, Slovakia
Maroš Turňa
Climatological Service Department, Slovak Hydrometeorological Institute, 833 15 Bratislava, Slovakia
Martina Zeleňáková
Department of Environmental Engineering, Technical University of Košice, 040 00 Košice, Slovakia
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We consider possible influence on severe weather occurrence by aurorally excited atmospheric gravity waves generated by solar wind coupling to the magnetosphere-ionosphere-atmosphere system. The results indicate that these gravity waves contribute to the release of instabilities in frontal zones of extratropical cyclones leading to convection and heavy precipitation. It is observed that severe snowstorms and flash floods tend to occur following arrivals of solar wind high-speed streams.
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Travelling ionospheric disturbances are plasma density fluctuations usually driven by atmospheric gravity waves in the neutral atmosphere. The aim of this study is to attribute multi-instrument observations of travelling ionospheric disturbances to gravity waves generated in the upper atmosphere at high latitudes or gravity waves generated by tropospheric weather systems at mid latitudes.
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The solar wind interaction with Earth’s magnetic field deposits energy into the upper portion of the atmosphere at high latitudes. The coupling process that modulates the ionospheric convection and intensity of ionospheric currents leads to formation of densely ionized patches convecting across the polar cap. The ionospheric currents launch traveling ionospheric disturbances (TIDs) propagating equatorward. The polar cap patches and TIDs are then observed by networks of radars and GPS receivers.
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Travelling ionospheric disturbances are plasma density fluctuations usually driven by atmospheric gravity waves in the neutral atmosphere. The aim of this study is to attribute multi-instrument observations of travelling ionospheric disturbances to gravity waves generated in the upper atmosphere at high latitudes or gravity waves generated by tropospheric weather systems at mid latitudes.
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The solar wind interaction with Earth’s magnetic field deposits energy into the upper portion of the atmosphere at high latitudes. The coupling process that modulates the ionospheric convection and intensity of ionospheric currents leads to formation of densely ionized patches convecting across the polar cap. The ionospheric currents launch traveling ionospheric disturbances (TIDs) propagating equatorward. The polar cap patches and TIDs are then observed by networks of radars and GPS receivers.
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Short summary
Climate change is affecting the stability of the atmosphere and increasing the occurrence of extreme rainfall and floods, which pose natural hazards with major socio-economic and health impacts. We show that such events tend to follow arrivals of high-speed solar wind. The role of atmospheric waves generated in the auroral region as the mechanism mediating the influence of solar wind coupling to the magnetosphere–ionosphere–atmosphere system on the troposphere is highlighted.
Climate change is affecting the stability of the atmosphere and increasing the occurrence of...
