Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere
<p>A severe meteorological storm system on the frontal border of cyclone Fabienne passing above central Europe was observed on 23–24 September 2018. Large meteorological systems are considered to be important sources of the wave-like variability visible/detectable through the atmosphere and ev...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2020-01-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/38/73/2020/angeo-38-73-2020.pdf |
| _version_ | 1828523235372695552 |
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| author | P. Koucká Knížová K. Podolská K. Potužníková D. Kouba Z. Mošna J. Boška M. Kozubek |
| author_facet | P. Koucká Knížová K. Podolská K. Potužníková D. Kouba Z. Mošna J. Boška M. Kozubek |
| author_sort | P. Koucká Knížová |
| collection | DOAJ |
| description | <p>A severe meteorological storm system on the frontal border of
cyclone Fabienne passing above central Europe was observed on 23–24 September 2018. Large meteorological systems are considered to be important
sources of the wave-like variability visible/detectable through the
atmosphere and even up to ionospheric heights. Significant departures from
regular courses of atmospheric and ionospheric parameters were detected in
all analyzed datasets through atmospheric heights. Above Europe,
stratospheric temperature and wind significantly changed in coincidence with
fast frontal transition (100–110 km h<span class="inline-formula"><sup>−1</sup>)</span>. Zonal wind at 1 and 0.1 hPa
changes from the usual westward before the storm to eastward after the storm. With this
change are connected changes in temperature where at 1 hPa the analyzed area is
colder and at 0.1 hPa warmer. Within ionospheric parameters, we have
detected significant wave-like activity occurring shortly after the cold
front crossed the observational point. During the storm event, both by
Digisonde DPS-4D and continuous Doppler sounding equipment, we have observed
strong horizontal plasma flow shears and time-limited increase plasma flow
in both the northern and western components of ionospheric drift. The vertical component
of plasma flow during the storm event is smaller with respect to
the corresponding values on preceding days.</p>
<p>The analyzed event of an exceptionally fast cold front of cyclone Fabienne fell
into the recovery phase of a minor–moderate geomagnetic storm observed as a
negative ionospheric storm at European mid-latitudes. Hence, ionospheric
observations consist both of disturbances induced by moderate geomagnetic
storms and effects originating in convective activity in the troposphere.
Nevertheless, taking into account a significant change in the global circulation
pattern in the stratosphere, we conclude that most of the observed wave-like
oscillations in the ionosphere during the night of 23–24 September can be directly
attributed to the propagation of atmospheric waves launched on the frontal
border (cold front) of cyclone Fabienne. The frontal system acted as an
effective source of atmospheric waves propagating upward up to the
ionosphere.</p> |
| first_indexed | 2024-12-11T20:23:56Z |
| format | Article |
| id | doaj.art-1cc581d919cd4d9aace7c222e0e23ec0 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-11T20:23:56Z |
| publishDate | 2020-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-1cc581d919cd4d9aace7c222e0e23ec02022-12-22T00:52:00ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762020-01-0138739310.5194/angeo-38-73-2020Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphereP. Koucká Knížová0K. Podolská1K. Potužníková2D. Kouba3Z. Mošna4J. Boška5M. Kozubek6Department of Ionosphere and Aeronomy, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech RepublicDepartment of Ionosphere and Aeronomy, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech RepublicDepartment of Meteorology, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech RepublicDepartment of Ionosphere and Aeronomy, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech RepublicDepartment of Ionosphere and Aeronomy, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech RepublicDepartment of Ionosphere and Aeronomy, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech RepublicDepartment of Ionosphere and Aeronomy, Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II/1401, 14100 Prague, Czech Republic<p>A severe meteorological storm system on the frontal border of cyclone Fabienne passing above central Europe was observed on 23–24 September 2018. Large meteorological systems are considered to be important sources of the wave-like variability visible/detectable through the atmosphere and even up to ionospheric heights. Significant departures from regular courses of atmospheric and ionospheric parameters were detected in all analyzed datasets through atmospheric heights. Above Europe, stratospheric temperature and wind significantly changed in coincidence with fast frontal transition (100–110 km h<span class="inline-formula"><sup>−1</sup>)</span>. Zonal wind at 1 and 0.1 hPa changes from the usual westward before the storm to eastward after the storm. With this change are connected changes in temperature where at 1 hPa the analyzed area is colder and at 0.1 hPa warmer. Within ionospheric parameters, we have detected significant wave-like activity occurring shortly after the cold front crossed the observational point. During the storm event, both by Digisonde DPS-4D and continuous Doppler sounding equipment, we have observed strong horizontal plasma flow shears and time-limited increase plasma flow in both the northern and western components of ionospheric drift. The vertical component of plasma flow during the storm event is smaller with respect to the corresponding values on preceding days.</p> <p>The analyzed event of an exceptionally fast cold front of cyclone Fabienne fell into the recovery phase of a minor–moderate geomagnetic storm observed as a negative ionospheric storm at European mid-latitudes. Hence, ionospheric observations consist both of disturbances induced by moderate geomagnetic storms and effects originating in convective activity in the troposphere. Nevertheless, taking into account a significant change in the global circulation pattern in the stratosphere, we conclude that most of the observed wave-like oscillations in the ionosphere during the night of 23–24 September can be directly attributed to the propagation of atmospheric waves launched on the frontal border (cold front) of cyclone Fabienne. The frontal system acted as an effective source of atmospheric waves propagating upward up to the ionosphere.</p>https://www.ann-geophys.net/38/73/2020/angeo-38-73-2020.pdf |
| spellingShingle | P. Koucká Knížová K. Podolská K. Potužníková D. Kouba Z. Mošna J. Boška M. Kozubek Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere Annales Geophysicae |
| title | Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere |
| title_full | Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere |
| title_fullStr | Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere |
| title_full_unstemmed | Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere |
| title_short | Evidence of vertical coupling: meteorological storm Fabienne on 23 September 2018 and its related effects observed up to the ionosphere |
| title_sort | evidence of vertical coupling meteorological storm fabienne on 23 september 2018 and its related effects observed up to the ionosphere |
| url | https://www.ann-geophys.net/38/73/2020/angeo-38-73-2020.pdf |
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