A plasmaspheric mass density model and constraints on its heavy ion concentration

Berube, D.; Moldwin, M. B.; Fung, S. F.; Green, J. L.

doi:10.1029/2004ja010684

Cited by 59 publications

(115 citation statements)

References 28 publications

Supporting

Mentioning

102

Contrasting

Order By: Relevance

“…In the last recent years there has been increasing use of ground-based ULF magnetic measurements to remote sense the plasma mass density in the magnetosphere Chi et al, 2000;Clilverd et al, 2003;Berube et al, 2005). This method consists of determining the frequency of the eigen-oscillations of a given geomagnetic field line (usually the field line midway between two latitudinally separated recording stations).…”

Section: Remote Sensing Of the Plasma Mass Density By Geomagnetic Fiementioning

confidence: 99%

ULF fluctuations of the geomagnetic field and ionospheric sounding measurements at low latitudes during the first CAWSES campaign

Villante¹,

Vellante²,

Francia³

et al. 2006

Ann. Geophys.

View full text Add to dashboard Cite

Abstract.We present an analysis of ULF geomagnetic field fluctuations at low latitudes during the first CAWSES campaign (29 March-3 April 2004). During the whole campaign, mainly in the prenoon sector, a moderate Pc3-4 pulsation activity is observed, clearly related to interplanetary upstream waves. On 3 April, in correspondence to the Earth's arrival of a coronal mass ejection, two SIs are observed whose waveforms are indicative of a contribution of the high-latitude ionospheric currents to the low-latitude ground field. During the following geomagnetic storm, low frequency (Pc5) waves are observed at discrete frequencies. Their correspondence with the same frequencies detected in the radial components of the interplanetary magnetic field and solar wind speed suggests that Alfvénic solar wind fluctuations may act as direct drivers of magnetospheric fluctuations. A cross-phase analysis, using different pairs of stations, is also presented for identifying field line resonant frequencies and monitoring changes in plasmaspheric mass density. Lastly, an analysis of ionospheric vertical soundings, measured at the Rome ionosonde station (41.8 • N, 12.5 • E), and vertical TEC measurements deduced from GPS signals within an European network shows the relation between the ULF resonances in the inner magnetosphere and thermal plasma density variations during geomagnetically quiet conditions, in contrast to various storm phases at the end of the CAWSES campaign.

show abstract

Section: Remote Sensing Of the Plasma Mass Density By Geomagnetic Fiementioning

confidence: 99%

ULF fluctuations of the geomagnetic field and ionospheric sounding measurements at low latitudes during the first CAWSES campaign

Villante¹,

Vellante²,

Francia³

et al. 2006

Ann. Geophys.

View full text Add to dashboard Cite

show abstract

“…This requires a mass correction factor m corr to calculate the plasma mass density ρ(s)=n(s)m corr m p accurately, where m p is the proton mass. A typical plasmaspheric plasma is composed of 55% H + , 40% He + and 5% O + (Berube et al, 2005) leading to a mass correction of m corr ≈3.…”

Section: Wave Frequencymentioning

confidence: 99%

Spatial and temporal characteristics of poloidal waves in the terrestrial plasmasphere: a CLUSTER case study

et al. 2007

View full text Add to dashboard Cite

Abstract. Oscillating magnetic field lines are frequently observed by spacecraft in the terrestrial and other planetary magnetospheres. The CLUSTER mission is a very suitable tool to further study these Alfvén waves as the four CLUS-TER spacecraft provide for an opportunity to separate spatial and temporal structures in the terrestrial magnetosphere. Using a large scaled configuration formed by the four spacecraft we are able to detect a poloidal Ultra-Low-Frequency (ULF) pulsation of the magnetic and electric field in order to analyze its temporal and spatial structures. For this purpose the measurements are transformed into a specific field line related coordinate system to investigate their specific amplitude pattern depending on the path of the CLUSTER spacecraft across oscillating field lines. These measurements are then compared with modeled spacecraft observations across a localized poloidal wave resonator in the dayside plasmasphere. A detailed investigation of theoretically expected poloidal eigenfrequencies allows us to specify the observed 16 mHz pulsation as a third harmonic oscillation. Based on this we perform a case study providing a clear identification of wave properties such as an spatial scale structure of about 0.67 R E , the azimuthal wave number m≈30, temporal evolution, and energy transport in the detected ULF pulsations.

show abstract

“…Algorithms have been developed for automated detection of FLRs and determination of mass density (Berube et al 2003;Lichtenberger et al 2013), achieving detection rates of order 50% (Chi et al 2013). Furthermore, comparison of FLR-based mass density estimates with whistler or in situ electron density data (and EUV-derived He + data if available) allows intercalibration of techniques (Clilverd et al 2003) and provides information on the heavy ion concentration (Berube et al 2005;Grew et al 2007). A plasmaspheric mass density model based on extensive observations from 7 ground magnetometer stations near 80°W geographic longitude was described by Berube et al (2005).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, comparison of FLR-based mass density estimates with whistler or in situ electron density data (and EUV-derived He + data if available) allows intercalibration of techniques (Clilverd et al 2003) and provides information on the heavy ion concentration (Berube et al 2005;Grew et al 2007). A plasmaspheric mass density model based on extensive observations from 7 ground magnetometer stations near 80°W geographic longitude was described by Berube et al (2005). Averaged over all conditions this model gives…”

Section: Introductionmentioning

confidence: 99%

Remote sensing the plasmasphere, plasmapause, plumes and other features using ground-based magnetometers

Menk

Kale

Sciffer

et al. 2014

J. Space Weather Space Clim.

View full text Add to dashboard Cite

The plasmapause is a highly dynamic boundary between different magnetospheric particle populations and convection regimes. Some of the most important space weather processes involve wave-particle interactions in this region, but wave properties may also be used to remote sense the plasmasphere and plasmapause, contributing to plasmasphere models. This paper discusses the use of existing ground magnetometer arrays for such remote sensing. Using case studies we illustrate measurement of plasmapause location, shape and movement during storms; refilling of flux tubes within and outside the plasmasphere; storm-time increase in heavy ion concentration near the plasmapause; and detection and mapping of density irregularities near the plasmapause, including drainage plumes, biteouts and bulges. We also use a 2D MHD model of wave propagation through the magnetosphere, incorporating a realistic ionosphere boundary and Alfvén speed profile, to simulate ground array observations of power and cross-phase spectra, hence confirming the signatures of plumes and other density structures.

show abstract

A plasmaspheric mass density model and constraints on its heavy ion concentration

Cited by 59 publications

References 28 publications

ULF fluctuations of the geomagnetic field and ionospheric sounding measurements at low latitudes during the first CAWSES campaign

ULF fluctuations of the geomagnetic field and ionospheric sounding measurements at low latitudes during the first CAWSES campaign

Spatial and temporal characteristics of poloidal waves in the terrestrial plasmasphere: a CLUSTER case study

Remote sensing the plasmasphere, plasmapause, plumes and other features using ground-based magnetometers

Contact Info

Product

Resources

About