Consequences of a saturated convection electric field on the ring current

M. W. Liemohn; J. U. Kozyra; M. R. Hairston; D. R. Weimer; G. Lu; A. J. Ridley; T. H. Zurbuchen; R. M. Skoug

doi:10.1029/2001gl014270

Consequences of a saturated convection electric field on the ring current

M. W. Liemohn, J. U. Kozyra, M. R. Hairston, D. R. Weimer, G. Lu, A. J. Ridley, T. H. Zurbuchen, R. M. Skoug

Geospace Frontiers

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

Results from kinetic simulations of hot ion transport in the inner magnetosphere are used to show that the ring current energy content must have a nonlinear (asymptotic) coupling relationship to extreme solar wind conditions due to saturation of the near-Earth convection electric field E_y,conv (defined as a function of cross polar cap potential ΔΦ_PC). This study examines the Bastille Day magnetic storm (July 14-17, 2000), where the z-component of the interplanetary magnetic field reached -58 nT and the solar wind speed exceeded 1100 km s^-1. A large discrepancy in the modeled ΔΦ_PC confirms a nonlinear response of the high-latitude potential during this event. It is found that this nonlinearity of E_y,conv is necessary to obtain reasonable agreement between the simulation results and the observed geoeffectiveness (Dst) of the storm.

Original language	English
Pages (from-to)	62-1-62-4
Journal	Geophysical Research Letters
Volume	29
Issue number	9
DOIs	https://doi.org/10.1029/2001gl014270
State	Published - May 1 2002

Access to Document

10.1029/2001gl014270

Cite this

@article{a9beb81409a6498a817d8223149d7751,

title = "Consequences of a saturated convection electric field on the ring current",

abstract = "Results from kinetic simulations of hot ion transport in the inner magnetosphere are used to show that the ring current energy content must have a nonlinear (asymptotic) coupling relationship to extreme solar wind conditions due to saturation of the near-Earth convection electric field Ey,conv (defined as a function of cross polar cap potential ΔΦPC). This study examines the Bastille Day magnetic storm (July 14-17, 2000), where the z-component of the interplanetary magnetic field reached -58 nT and the solar wind speed exceeded 1100 km s-1. A large discrepancy in the modeled ΔΦPC confirms a nonlinear response of the high-latitude potential during this event. It is found that this nonlinearity of Ey,conv is necessary to obtain reasonable agreement between the simulation results and the observed geoeffectiveness (Dst) of the storm.",

author = "Liemohn, \{M. W.\} and Kozyra, \{J. U.\} and Hairston, \{M. R.\} and Weimer, \{D. R.\} and G. Lu and Ridley, \{A. J.\} and Zurbuchen, \{T. H.\} and Skoug, \{R. M.\}",

year = "2002",

month = may,

day = "1",

doi = "10.1029/2001gl014270",

language = "English",

volume = "29",

pages = "62--1--62--4",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley and Sons Inc.",

number = "9",

}

TY - JOUR

T1 - Consequences of a saturated convection electric field on the ring current

AU - Liemohn, M. W.

AU - Kozyra, J. U.

AU - Hairston, M. R.

AU - Weimer, D. R.

AU - Lu, G.

AU - Ridley, A. J.

AU - Zurbuchen, T. H.

AU - Skoug, R. M.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - Results from kinetic simulations of hot ion transport in the inner magnetosphere are used to show that the ring current energy content must have a nonlinear (asymptotic) coupling relationship to extreme solar wind conditions due to saturation of the near-Earth convection electric field Ey,conv (defined as a function of cross polar cap potential ΔΦPC). This study examines the Bastille Day magnetic storm (July 14-17, 2000), where the z-component of the interplanetary magnetic field reached -58 nT and the solar wind speed exceeded 1100 km s-1. A large discrepancy in the modeled ΔΦPC confirms a nonlinear response of the high-latitude potential during this event. It is found that this nonlinearity of Ey,conv is necessary to obtain reasonable agreement between the simulation results and the observed geoeffectiveness (Dst) of the storm.

AB - Results from kinetic simulations of hot ion transport in the inner magnetosphere are used to show that the ring current energy content must have a nonlinear (asymptotic) coupling relationship to extreme solar wind conditions due to saturation of the near-Earth convection electric field Ey,conv (defined as a function of cross polar cap potential ΔΦPC). This study examines the Bastille Day magnetic storm (July 14-17, 2000), where the z-component of the interplanetary magnetic field reached -58 nT and the solar wind speed exceeded 1100 km s-1. A large discrepancy in the modeled ΔΦPC confirms a nonlinear response of the high-latitude potential during this event. It is found that this nonlinearity of Ey,conv is necessary to obtain reasonable agreement between the simulation results and the observed geoeffectiveness (Dst) of the storm.

UR - https://www.scopus.com/pages/publications/0036558682

U2 - 10.1029/2001gl014270

DO - 10.1029/2001gl014270

M3 - Article

AN - SCOPUS:0036558682

SN - 0094-8276

VL - 29

SP - 62-1-62-4

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 9

ER -

Consequences of a saturated convection electric field on the ring current

Abstract

Access to Document

Other files and links

Fingerprint

Cite this