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Evaluation of the STORM model storm-time corrections for middle latitude. D. Buresova (1) , L-A. McKinnell (2) , T.Sindelarova (1) , I. Blanco Alegre (3) and B. De La Morena (3) (1) Institute of Atmospheric Physics, Prague, Czech Republic
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D. Buresova(1), L-A. McKinnell(2), T.Sindelarova(1),
I. Blanco Alegre(3) and B. De La Morena(3)
(1) Institute of Atmospheric Physics, Prague, Czech Republic
(2) Hermanus Magnetic Observatory, Hermanus, South Africa
(3) Ionospheric observatory, El Arenosillo, Huelva, Spain
IRI simulation of ionospheric storm effects:
STORM model design and results of the previous validations
Occurrence of the positive and negative effects of ionospheric storms over European middle latitudes
Evaluation of the quality of the STORM model ionospheric storm-time corrections over middle latitudes
(Araujo-Pradere et al., 2002)
(Prolss, 1993, Fuller-Rowell et al., 1996).
(Fuller-Rowell et al., 1996, 1998)
The created database incorporates 65 strong-to-severe magnetic storms occurred within the period from 1995 to 2005. The study is carried out using F2 region peak parameters available in the World Data Centre for Solar-Terrestrial Physics at Chilton (WDC1) http://www.ukssdc.ac.uk/wdcc1,inthe Digital Ionogram Database of the Centre for Atmospheric Research, UMass, Lowell http://ulcar.uml.edu/DIDBase/, in the COST 271 databasehttp://www.wdc.rl.ac.uk/cgi-gin/ionosondes/cost_database.pl. and provided by ionospheric stations. Parameters used are hourly interval resolution manually checked foF2 values for the initial, main and partly for recovery phases of the analysed magnetic storms (at least for a 5-day period) for each station and corresponding monthly medians. The parameters simulation has been performed by running online model available at the IRI web site http://omniweb.gsfc.nasa.gov/vitmo/iri_vitmo.html.
· Sudden storm commencement (SSC) has been chosen as an indicator of the storm onset. The storm main phase is defined by the decrease of Dst (decrease in magnetic field strength) and the subsequent recovery phase by its gradual reversal to quiet conditions.
· Strong storm conditions were defined when Dst ≤ -100 nT for at least 2 consecutive hours. Storm conditions prevail till Dst < -50 nT.
Observed values and output of the STORM model as foF2 ratio for May 1997 storm. The dashed line shows the output of the IRI model, the black line is the observation. An empty square represents the daily RMSE for STORM, and the cross is the IRI with STORM option switched off.
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