Magnetosphere-associated storms and the autonomous storms in the ionosphere–plasmasphere environment

Gulyaeva, T.L.; Stanisławska, I.

doi:10.1016/j.jastp.2009.10.012

Cited by 18 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that Figure 6shows an auroral electrojet (AE) index enhancement (greater than 1000 nT) and the local ionospheric effect during the planetary ionosphere‐plasmasphere storm. This particular storm, with a duration of 56 h according to GIM‐TEC maps, was observed from 19:00 UT on 3 August 2010, reaching storm peak at 00:00 UT on 4 August with a recovery phase afterward, according to a catalog of ionosphere‐plasmasphere storms [ Gulyaeva and Stanislawska , 2010]. Note that this storm occurred during the deep solar minimum of the 23rd solar cycle.…”

Section: Model Resultsmentioning

confidence: 99%

Empirical model of ionospheric storm effects on the F₂ layer peak height associated with changes of peak electron density

Gulyaeva¹

2012

J. Geophys. Res.

View full text Add to dashboard Cite

[1] An empirical model of storm-time behavior of the ionospheric peak height h m F 2 associated with changes of peak electron density N m F 2 is inferred from the topside true-height profiles provided by ISIS 1, ISIS 2, IK-19, and Cosmos-1809 satellites for the period of 1969-1987. The topside-derived quiet-time models of the ionospheric peak height h q F 2 and peak electron density N q F 2 are used as a frame of reference. To harmonize the model with storm and substorm effects induced by large-scale traveling ionospheric disturbances (LSTIDs), constraints are applied to the topside data, excluding their changes deviating above LSTID extreme limits. The degree of disturbance is estimated by the ionospheric weather W index; then, the least squares fitting is applied to the median of log (h m /h q ) versus log(N m /N q ). Anticorrelation between instant changes of h m F 2 and N m F 2 has a particular seasonal-magnetic latitude structure varying with solar activity that is used for the buildup of the analytical model. The model allows the deduction of the instantaneous h m F 2 associated with the assessment or forecast of the respective N m F 2 . The model is validated with the data of five ground-based ionosondes during severe space weather storms at times of high solar activity (2000) and low solar activity (2006), and results agree reasonably well with the peak parameters derived from an ionogram. The model is incorporated into the coupled International Reference Ionosphere-Plasmasphere (IRI-Plas) code, used in the assimilative mode as the three-dimensional (3-D) interpolator of the GPS-derived total electron content, TEC gps .Citation: Gulyaeva, T. L. (2012), Empirical model of ionospheric storm effects on the F 2 layer peak height associated with changes of peak electron density,

show abstract

Section: Model Resultsmentioning

confidence: 99%

Empirical model of ionospheric storm effects on the F₂ layer peak height associated with changes of peak electron density

Gulyaeva¹

2012

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…The maximum duration of each storm in hours (h); the peak W p index reached during the storm; and the peak values of relevant geomagnetic indices: the planetary A p index (and its integrated equivalent A pi for the preceding 39 hrs used by the IRI-Storm option), the Auroral Electrojet AE index and the disturbance storm time D st index are provided in Table 2. The characteristics of the space weather storms that are given in Table 2 indicate that the ionosphere and plasmasphere can be stormy while the magnetosphere remains quiet (Gulyaeva and Stanislawska, 2010).…”

Section: Resultsmentioning

confidence: 99%

Inter-hemispheric imaging of the ionosphere with the upgraded IRI-Plas model during the space weather storms

2011

Self Cite

View full text Add to dashboard Cite

International Reference Ionosphere extended to the plasmasphere (IRI-Plas) is upgraded analytically for assimilative mode of operation using GPS-derived Total Electron Content (TEC) for reconstruction of instantaneous ionospheric critical frequency and topside scale height at magnetic conjugate hemisphere. The performance of IRI-Plas code is examined with TEC gps retrieved from Global Ionospheric Maps compared with the F 2 -layer critical frequency at eight ionosonde locations in East Asia region on both hemispheres during the space weather storms at solar maximum (2000) and solar minimum (2006). Missing ionosonde data are completed by cloning of critical frequency. Decomposition of TEC gps in electron density profile with IRI-Plas code reveals the opposite relative changes of critical frequency and the topside scale height depending on solar activity. The ionospheric weather W index is computed for the desired locations in conjugate hemispheres and consistent results are obtained indicating the departure of instantaneous values of ionospheric parameters from their respective median varying from quiet state to intense storm.

show abstract

“…These storms are listed in Table ranked by decreasing order of the superstorm power (Ps) for Dst index. The storm power has been introduced earlier for the ionosphere storms by Gulyaeva and Stanislawska () and produced online since 1994 to present in the catalog of Wp (TEC) storms at http://www.izmiran.ru/ionosphere/weather/storm/. Power of storm, Ps, is a product of the magnitude of storm amplitude, Sm (Sm = −Dst min , AE max , aa max , and ap max ) multiplied by the respective time interval, throughout the storm duration, Δ t sd , in hours:

Ps = Sm \times normalΔ t_{sd,}

…”

Section: Discussionmentioning

confidence: 99%

Ionospheric Weather During Five Extreme Geomagnetic Superstorms Since IGY Deduced With the Instantaneous Global Maps GIM‐foF2

et al. 2018

View full text Add to dashboard Cite

An assessment of the ionosphere perturbations can be made through the construction of the global instantaneous maps of the foF2 critical frequency (GIM‐foF2) and the ionospheric weather index maps GIM‐Wf. These maps can offer a potentially useful tool to provide users with a proper selection of the best radio wave propagation conditions over a certain area and also be used to help mitigate the effects of the disturbances on HF (High Frequency) communication and Global Navigation Satellite System positioning. This paper presents results of reconstruction of the ionospheric weather during five of the most intense superstorms observed since International Geophysical Year, IGY (1957, 1958, 1959, 1989, and 2003) with the instantaneous global maps of the F2 layer critical frequency, GIM‐foF2, and the ionospheric weather index maps, GIM‐Wf. The intensity of the ionospheric superstorm is characterized by the planetary Wfp index derived from GIM‐Wf maps. Superposed epoch analysis of the extreme superstorms is made during 24 hr before the Wfp peak (time zero t0 = 0 hr) and 48 hr afterwards. Model relationship is established between mean Wfp profile and geomagnetic superstorm profiles demonstrating saturation of the ionospheric storm activity toward the peak of geomagnetic storm. Time lag of Wfpmax is found equal to 9 hr after AEmax, 6 hr after apmax and aamax, and 2 hr after Dstmin, which allows model forecast of ionospheric superstorm when geomagnetic superstorm is captured with one or more of geomagnetic indices.

show abstract

Magnetosphere-associated storms and the autonomous storms in the ionosphere–plasmasphere environment

Cited by 18 publications

References 19 publications

Empirical model of ionospheric storm effects on the F₂ layer peak height associated with changes of peak electron density

Empirical model of ionospheric storm effects on the F₂ layer peak height associated with changes of peak electron density

Inter-hemispheric imaging of the ionosphere with the upgraded IRI-Plas model during the space weather storms

Ionospheric Weather During Five Extreme Geomagnetic Superstorms Since IGY Deduced With the Instantaneous Global Maps GIM‐foF2

Contact Info

Product

Resources

About

Magnetosphere-associated storms and the autonomous storms in the ionosphere–plasmasphere environment

Cited by 18 publications

References 19 publications

Empirical model of ionospheric storm effects on the F2 layer peak height associated with changes of peak electron density

Empirical model of ionospheric storm effects on the F2 layer peak height associated with changes of peak electron density

Inter-hemispheric imaging of the ionosphere with the upgraded IRI-Plas model during the space weather storms

Ionospheric Weather During Five Extreme Geomagnetic Superstorms Since IGY Deduced With the Instantaneous Global Maps GIM‐foF2

Contact Info

Product

Resources

About

Empirical model of ionospheric storm effects on the F₂ layer peak height associated with changes of peak electron density

Empirical model of ionospheric storm effects on the F₂ layer peak height associated with changes of peak electron density