Cyclone Fabienne as a Source of Disturbances Observed up to Ionospheric Heights

0508481 - ÚFA 2020 DE eng A - Abstrakt
Koucká Knížová, Petra - Podolská, Kateřina - Potužníková, Kateřina - Mošna, Zbyšek - Kouba, Daniel - Boška, Josef - Kozubek, Michal
Cyclone Fabienne as a Source of Disturbances Observed up to Ionospheric Heights.
IUGG 2019 Abstract Book. Potsdam: International Union of Geodesy and Geophysics, 2019. A03p-222.
[IUGG General Assembly /27./. 08.07.2019-18.07.2019, Montréal]
Institucionální podpora: RVO:68378289
Klíčová slova: middle atmosphere * stratosphere * ionosphere * meteorological storm event * meteorological cold front * ionospheric drift * atmospheric waves propagation * cyclone Fabienne
Obor OECD: Meteorology and atmospheric sciences
http://iugg2019montreal.com/abstract-book.html

Severe meteorological storm on the cold front of the cyclone Fabienne passing above Central Europe was
observed on September 23 – 24, 2018. Large meteorological systems act as important sources of the wavelike variability detectable through the atmosphere and up to ionosphere heights. Significant departures from
regular courses of atmospheric and ionospheric parameters were visible in all analyzed data sets through
atmospheric heights. We have noticed change in the stratospheric temperature and wind behavior before and
after storm event. Within ionospheric parameters, we have detected significant wave-like activity occurring
shortly after the frontal transit of the observational point in the troposphere. During storm event, apart from
the of growth of wave activity, we have observed strong horizontal plasma flow shears and time-limited
increase plasma flow in both North and West components of ionospheric drift. Vertical component of plasma
flow during storm event is smaller with respect to corresponding values on preceding days. Despite the fact
that the analyzed event fell into the recovery phase of moderate geomagnetic storm observed in the
ionosphere as a decrease of electron concentration (negative storm), we believe that most of the observed
disturbances are linked to the propagation of atmospheric waves launched from moving frontal border (cold
front) of the exceptional cyclone Fabienne.
Trvalý link: http://hdl.handle.net/11104/0299376