Substorms, Storms, and the Near-Earth Tail.

Baumjohann, W.; Kamide, Y.; Nakamura, R.

doi:10.5636/jgg.48.177

Cited by 60 publications

(85 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Like Baumjohann et al (1996) we find that the average temperature of ions in the CPS is strongly increased during magnetic storms. Since the ion temperature remains significantly above quiet time levels even during the recovery phase, we conclude that the energetic ions remain trapped in the CPS and loose their energy only gradually, comparable to the slow, exponential decay of the ring current during the recovery phase.…”

Section: Properties Of the Storm-time Cpsmentioning

confidence: 52%

“…Consequently, on average, the CPS seems to be inflated in the region 10-30 R E during the storm main phase. Baumjohann et al (1996) found that the magnetic field elevation in the 10-20 R E CPS is considerably increased by substorms that occur during storm times, while the lobe magnetic pressure decreases. These findings correspond well to the interpretation of an average dipolarization of the 10-30 R E CPS during the storm main phase caused by a successive occurrence of substorms.…”

Section: Properties Of the Storm-time Cpsmentioning

confidence: 99%

“…Baumjohann et al (1996) compared the behavior of the near-Earth tail during storm-time and non-storm substorms, deriving the following picture. Substorms that occur during magnetic storms are accompanied by a much stronger dipolarization of the magnetic field in the central plasma sheet (CPS) than non-storm substorms.…”

Section: Introductionmentioning

confidence: 99%

“…While both types of substorms heat the CPS ion population by about equal amounts, the ions in the storm time CPS have already a temperature about twice as high as the non-storm CPS ions before substorm onset. Baumjohann et al (1996) concluded that during storm-time susbtorms lobe magnetic flux might be reconnected at a near-Earth neutral line (NENL), and that the stronger dipolarization and the higher temperature of the plasma sheet during storm-time substorms lead to an effective injection of energetic particles into the ring current.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The storm time central plasma sheet

Schödel

Dierschke

Baumjohann³

et al. 2002

Ann. Geophys.

Self Cite

View full text Add to dashboard Cite

Abstract. The plasma sheet plays a key role during magnetic storms because it is the bottleneck through which large amounts of magnetic flux that have been eroded from the dayside magnetopause have to be returned to the dayside magnetosphere. Using about five years of Geotail data we studied the average properties of the near-and midtail central plasma sheet (CPS) in the 10-30 R E range during magnetic storms. The earthward flux transport rate is greatly enhanced during the storm main phase, but shows a significant earthward decrease. Hence, since the magnetic flux cannot be circulated at a sufficient rate, this leads to an average dipolarization of the central plasma sheet. An increase of the specific entropy of the CPS ion population by a factor of about two during the storm main phase provides evidence for nonadiabatic heating processes. The direction of flux transport during the main phase is consistent with the possible formation of a near-Earth neutral line beyond ∼20 R E .

show abstract

Section: Properties Of the Storm-time Cpsmentioning

confidence: 52%

Section: Properties Of the Storm-time Cpsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The storm time central plasma sheet

Schödel

Dierschke

Baumjohann³

et al. 2002

Ann. Geophys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…During the reconnection process efficient transfer of energy takes place from solar wind into magnetosphere as well as huge fluxes of charged particles enter the magnetosphere. These charged particles are deflected by the magnetic field of earth and circulate around the earth at a height of about 2 -7 R E (Earth Radii) [12], constituting a belt of current around earth, known as the ring current [13,14]. In addition some particles reach the high latitudinal ionosphere where they also develop other current system.…”

Section: Introductionmentioning

confidence: 99%

Variability of Geomagnetic Field with Interplanetary Magnetic Field at Low, Mid and High Latitudes

et al. 2018

View full text Add to dashboard Cite

The fluctuations in the Interplanetary Magnetic Field significantly affect the state of geomagnetic field particularly during the Coronal Mass Ejection (CME) events. In the present investigation we have studied the influence of Interplanetary Magnetic Field changes on the geomagnetic field components at high, low and mid latitudes. To carry out this investigation we have selected three stations viz. Alibag (18.6°N, 72.7°E), Beijing MT (40.3°N, 116.2°E) and Casey (66.2°S, 110.5°E) one each in the low, mid and high latitude regions. Then we selected geomagnetic storm events of three types namely weak (-50≤Dst≤-20), moderate (100≤Dst≤-50) and intense (Dst≤-100nT). In each storm category 10 events were considered. From our study we conclude that geomagnetic field components are significantly affected by the changes in the IMF at all the three latitudinal regions during all the storm events. At the same time we also found that the magnitude of change in geomagnetic field components is highest at the high latitudes during all types of storm events while at low and mid latitude stations the magnitude of effect is approximately the same.

show abstract

A case study of ionospheric storm effects during long‐lasting southward IMF B_z‐driven geomagnetic storm

Liu

Nakamura

et al. 2014

JGR Space Physics

View full text Add to dashboard Cite

Multiple instrumental observations including GPS total electron content (TEC), f o F 2 and h m F 2 from ionosondes, vertical ion drift measurements from Communication/Navigation Outage Forecasting System, magnetometer data, and far ultraviolet airglow measured by Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics/Global Ultraviolet Imager (TIMED/GUVI) are used to investigate the profound ionospheric disturbances at midlatitude and low latitude during the 14-17 July 2012 geomagnetic storm event, which was featured by prolonged southward interplanetary geomagnetic field component for about 30 h below À10 nT. In the East Asian/Australian sector, latitudinal profile of TEC variations in the main phase were characterized by three bands of increments and separated by weak depressions in the equatorial ionospheric anomaly (EIA) crest regions, which were caused by the combined effects of disturbance dynamo electric fields (DDEF) and equatorward neutral winds. In the recovery phase, strong inhibition of EIA occurred and the summer crest of EIA disappeared on 16 July due to the combined effects of intrusion of neutral composition disturbance zone as shown by the TIMED/GUVI O/N 2 measurements and long-lasting daytime westward DDEF inferred from the equatorial electrojet observations. The transit time of DDEF over the dip equator from westward to eastward is around 2200 LT. In the American longitude, the salient ionospheric disturbances in the summer hemisphere were characterized by daytime periodical intrusion of negative phase for three consecutive days in the recovery phase, preceded by storm-enhanced density plume in the initial phase. In addition, multiple short-lived prompt penetration electric fields appeared during stable southward interplanetary magnetic field (IMF) B z in the recovery phase and were responsible for enhanced the EIA and equatorial ionospheric uplift around sunset.

show abstract

Substorms, Storms, and the Near-Earth Tail.

Cited by 60 publications

References 16 publications

The storm time central plasma sheet

The storm time central plasma sheet

Variability of Geomagnetic Field with Interplanetary Magnetic Field at Low, Mid and High Latitudes

A case study of ionospheric storm effects during long‐lasting southward IMF B_z‐driven geomagnetic storm

Contact Info

Product

Resources

About

Substorms, Storms, and the Near-Earth Tail.

Cited by 60 publications

References 16 publications

The storm time central plasma sheet

The storm time central plasma sheet

Variability of Geomagnetic Field with Interplanetary Magnetic Field at Low, Mid and High Latitudes

A case study of ionospheric storm effects during long‐lasting southward IMF Bz‐driven geomagnetic storm

Contact Info

Product

Resources

About

A case study of ionospheric storm effects during long‐lasting southward IMF B_z‐driven geomagnetic storm