On the dynamics of large-scale traveling ionospheric disturbances over Europe on 20 November 2003

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F17%3A00469343" target="_blank" >RIV/68378289:_____/17:00469343 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/2016JA023050" target="_blank" >http://dx.doi.org/10.1002/2016JA023050</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2016JA023050" target="_blank" >10.1002/2016JA023050</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the dynamics of large-scale traveling ionospheric disturbances over Europe on 20 November 2003

Popis výsledku v původním jazyce

Ionospheric disturbances, often associated with geomagnetic storms, may cause threats to radio systems used for communication and navigation. One example is the super storm on 20th November 2003, when plenty of strong and unusual perturbations were reported. This paper reveals additional information on the dynamics in the high latitude ionosphere over Europe during this storm. Here, analyses of wavelike Travelling Ionospheric Distrubances (TIDs) over Europe are presented, based on estimates of the Total Electron Content (TEC) derived from ground-based Global Navigation Satellite System (GNSS) measurements. These TIDs are ionospheric signatures of thermospheric surges initiated by space weather events. The source region of these TIDs is characterized by enhanced spatial gradients, TEC depression, strong uplift of the F2-layer, the vicinity of the eastward auroral electrojet and strong aurora E-layers. Joule heating is identified as the most probable driver for the TIDs observed over Europe during 20th November 2003. The sudden heating of the thermosphere leads to strong changes in the pressure and thermospheric wind circulation system, which in turn generates thermospheric wind surges observed as TID signatures in the TEC. Either the dissipation of the eastward auroral electrojet or particle precipitation are considered as the source mechanism for the Joule heating.In the course of the storm, the TEC observations show a southward shift of the source region of the TIDs. These meridional dislocation effects are obviously related to a strong compression of the plasmasphere. The presented results demonstrate the complex interaction processes in the thermosphere-ionosphere-magnetosphere system during this extreme storm.

Název v anglickém jazyce

On the dynamics of large-scale traveling ionospheric disturbances over Europe on 20 November 2003

Popis výsledku anglicky

Ionospheric disturbances, often associated with geomagnetic storms, may cause threats to radio systems used for communication and navigation. One example is the super storm on 20th November 2003, when plenty of strong and unusual perturbations were reported. This paper reveals additional information on the dynamics in the high latitude ionosphere over Europe during this storm. Here, analyses of wavelike Travelling Ionospheric Distrubances (TIDs) over Europe are presented, based on estimates of the Total Electron Content (TEC) derived from ground-based Global Navigation Satellite System (GNSS) measurements. These TIDs are ionospheric signatures of thermospheric surges initiated by space weather events. The source region of these TIDs is characterized by enhanced spatial gradients, TEC depression, strong uplift of the F2-layer, the vicinity of the eastward auroral electrojet and strong aurora E-layers. Joule heating is identified as the most probable driver for the TIDs observed over Europe during 20th November 2003. The sudden heating of the thermosphere leads to strong changes in the pressure and thermospheric wind circulation system, which in turn generates thermospheric wind surges observed as TID signatures in the TEC. Either the dissipation of the eastward auroral electrojet or particle precipitation are considered as the source mechanism for the Joule heating.In the course of the storm, the TEC observations show a southward shift of the source region of the TIDs. These meridional dislocation effects are obviously related to a strong compression of the plasmasphere. The presented results demonstrate the complex interaction processes in the thermosphere-ionosphere-magnetosphere system during this extreme storm.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/GA15-24688S" target="_blank" >GA15-24688S: Proměnlivost ionosféry a neutrální atmosféry ve středních šířkách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Svazek periodika

122

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

1199-1211

Kód UT WoS článku

000395655800084

EID výsledku v databázi Scopus

2-s2.0-85010842027