Satellite observations of lightning‐induced electron precipitation

Voss, H. D.; Walt, M.; Imhof, W. L.; Mobilia, J.; Inan, U. S.

doi:10.1029/97ja02878

Cited by 104 publications

(157 citation statements)

References 35 publications

Supporting

Mentioning

146

Contrasting

Order By: Relevance

“…, these events were thought to be produced only by ducted whistlers, which propagate within (and thus affect only the electrons within) filamentary ducts <400 km at the equator [e.g., Burgess and Inan, 1993]. Uncertainties in the number and size of ducts made it difficult to estimate global consequences of the LEP phenomenon [Walt, 1996;Voss et al, 1998]. The observations presented in this paper underscore the role of nonducted whistlers and indicate that the LEP process may be more pervasive than previously thought.…”

Section: Interpretation Of L Dependencementioning

confidence: 99%

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Blake¹,

Inan²,

Walt³

et al. 2001

J. Geophys. Res.

Self Cite

View full text Add to dashboard Cite

Abstract. With its relatively low altitude (520 x 670 km) orbit, SAMPEX is mostly below the stable trapping region where charged particles repeatedly drift around the Earth, especially at midlatitudes. Recent analyses of SAMPEX data have revealed a surprisingly common set of observations of enhanced energetic (>150 keV) electron fluxes at L < 3, during times when SAMPEX was located such that any electrons that it observed were in the drift loss cone (and were thus destined to be precipitated upon reaching

show abstract

Section: Interpretation Of L Dependencementioning

confidence: 99%

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Blake¹,

Inan²,

Walt³

et al. 2001

J. Geophys. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, during major geomagnetic storms, such as the Halloween storm in 2003, the flux of relativistic electrons in the slot region increases dramatically [Baker et al, 2004], as a result of enhanced inward transport and wave acceleration Shprits et al, 2006;Thorne et al, 2007]. The enhanced flux of relativistic electrons subsequently decay to the prestorm equilibrium levels on a timescale of days to weeks, largely due to the resonant pitch angle scattering by plasmaspheric hiss [Lyons et al, 1972;Lyons and Thorne, 1973;Albert, 1994;Thorne 1998a, 1998b], although losses due to lightning-induced electron precipitation may be important at lower energies [Voss et al, 1998;Blake et al, 2001;Rodger and Clilverd, 2002]. Farther out, pitch angle scattering by plasmaspheric hiss contributes to the loss of outer radiation belt electrons during the main and recovery phases of a storm [Summers et al, 2007] and can explain the quiet time decay of outer radiation belt electrons over a wide range of energies and L shells [e.g., Meredith et al, 2006a].…”

Section: Introductionmentioning

confidence: 99%

Slot region electron loss timescales due to plasmaspheric hiss and lightning‐generated whistlers

et al. 2007

View full text Add to dashboard Cite

[1] Energetic electrons (E > 100 keV) in the Earth's radiation belts undergo Dopplershifted cyclotron resonant interactions with a variety of whistler mode waves leading to pitch angle scattering and subsequent loss to the atmosphere. In this study we assess the relative importance of plasmaspheric hiss and lightning-generated whistlers in the slot region and beyond. Electron loss timescales are determined using the Pitch Angle and energy Diffusion of Ions and Electrons (PADIE) code with global models of the spectral distributions of the wave power based on CRRES observations. Our results show that plasmaspheric hiss propagating at small and intermediate wave normal angles is a significant scattering agent in the slot region and beyond. In contrast, plasmaspheric hiss propagating at large wave normal angles and lightning-generated whistlers do not contribute significantly to radiation belt loss. The loss timescale of 2 MeV electrons due to plasmaspheric hiss propagating at small and intermediate wave normal angles in the center of the slot region (L = 2.5) lies in the range 1-10 days, consistent with recent Solar Anomalous and Magnetospheric Particle Explorer (SAMPEX) observations. Wave turbulence in space, which is responsible for the generation plasmaspheric hiss, thus leads to the formation of the slot region. During active periods, losses due to plasmaspheric hiss may occur on a timescale of 1 day or less for a wide range of energies, 200 keV < E < 1 MeV, in the region 3.5 < L < 4.0. Plasmaspheric hiss may thus also be a significant loss process in the inner region of the outer radiation belt during magnetically disturbed periods.Citation: Meredith, N. P., R. B. Horne, S. A. Glauert, and R. R. Anderson (2007), Slot region electron loss timescales due to plasmaspheric hiss and lightning-generated whistlers,

show abstract

“…Precipitation loss of electrons due to wave scattering is attributed to a number of wave scattering mechanisms-e.g., interaction with electromagnetic ion cyclotron waves Meredith et al, 2003;Loto'aniu et al, 2006;, plasmaspheric hiss [Abel and Thorne, 1998;Meredith et al, 2006Meredith et al, , 2007, whistler mode chorus waves Thorne et al, 2005;Shprits et al, 2007], and lightning-generated whistlers [Voss et al, 1998;Rodger et al, 2003;Bortnik et al, 2006]. Drift loss of electrons occurs when the magnetopause is compressed inward and intersects the drift path of electrons in the outer radiation belt [Shprits et al, 2006;Turner et al, 2012;Tu et al, 2013Tu et al, , 2014.…”

Section: 1002/2015ja021003mentioning

confidence: 99%

“…There are currently three types of loss mechanisms to explain the electron flux dropout in the outer radiation belt: adiabatic loss or "Dst effect" [Kim and Chan, 1997]; precipitation loss to the atmosphere via pitch angle scattering with plasma waves Abel and Thorne, 1998;O'Brien et al, 2003;Voss et al, 1998]; and drift loss to the magnetopause and outward radial diffusion [Brautigam and Albert, 2000;Miyoshi et al, 2003;Shprits et al, 2006;Ohtani et al, 2009;Matsumura et al, 2011;Turner et al, 2012;Tu et al, 2014].…”

Section: Introductionmentioning

confidence: 99%

Relativistic electron flux dropouts in the outer radiation belt associated with corotating interaction regions

et al. 2015

View full text Add to dashboard Cite

Understanding how the relativistic electron fluxes drop out in the outer radiation belt under different conditions is of great importance. To investigate which mechanisms may affect the dropouts under different solar wind conditions, 1.5–6.0 MeV electron flux dropout events associated with 223 corotating interaction regions (CIRs) from 1994 to 2003 are studied using the observations of Solar, Anomalous, Magnetospheric Particle Explorer satellite. According to the superposed epoch analysis, it is found that high solar wind dynamic pressure with the peak median value of about 7 nPa is corresponding to the dropout of the median of the radiation belt content (RBC) index to 20% of the level before stream interface arrival, whereas low dynamic pressure with the peak median value of about 3 nPa is related to the dropout of the median of RBC index to 40% of the level before stream interface arrival. Furthermore, the influences of Russell‐McPherron effect with respect to interplanetary magnetic field orientation on dropouts are considered. It is pointed out that under positive Russell‐McPherron effect (+RM effect) condition, the median of RBC index can drop to 23% of the level before stream interface arrival, while for negative Russell‐McPherron effect (−RM effect) events, the median of RBC index only drops to 37% of the level before stream interface arrival. From the evolution of phase space density profiles, the effect of +RM on dropouts can be through nonadiabatic loss.

show abstract

Satellite observations of lightning‐induced electron precipitation

Cited by 104 publications

References 35 publications

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Slot region electron loss timescales due to plasmaspheric hiss and lightning‐generated whistlers

Relativistic electron flux dropouts in the outer radiation belt associated with corotating interaction regions

Contact Info

Product

Resources

About