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Modeling of time-evolving magnetic fields during substorms. / Lu, G; Tsyganenko, NA; Lui, ATY; Singer, HJ; Nagai, T; Kokubun, S.

In: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol. 104, No. A6, 01.06.1999, p. 12327-12337.

Research output: Contribution to journalArticlepeer-review

Harvard

Lu, G, Tsyganenko, NA, Lui, ATY, Singer, HJ, Nagai, T & Kokubun, S 1999, 'Modeling of time-evolving magnetic fields during substorms', JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, vol. 104, no. A6, pp. 12327-12337. https://doi.org/10.1029/1999JA900145

APA

Lu, G., Tsyganenko, NA., Lui, ATY., Singer, HJ., Nagai, T., & Kokubun, S. (1999). Modeling of time-evolving magnetic fields during substorms. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 104(A6), 12327-12337. https://doi.org/10.1029/1999JA900145

Vancouver

Lu G, Tsyganenko NA, Lui ATY, Singer HJ, Nagai T, Kokubun S. Modeling of time-evolving magnetic fields during substorms. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. 1999 Jun 1;104(A6):12327-12337. https://doi.org/10.1029/1999JA900145

Author

Lu, G ; Tsyganenko, NA ; Lui, ATY ; Singer, HJ ; Nagai, T ; Kokubun, S. / Modeling of time-evolving magnetic fields during substorms. In: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS. 1999 ; Vol. 104, No. A6. pp. 12327-12337.

BibTeX

@article{aab52bdc55d74c57b85e9c8c4f061f20,
title = "Modeling of time-evolving magnetic fields during substorms",
abstract = "An attempt has been made to model the dynamics of the magnetospheric magnetic field during substorms by modifying the 1996 version of the data-based model by Tsyganenko [1996]. The modified model incorporates an adjustment to the intensity and thickness of the near-tail current sheet and a contribution from the substorm current wedge. These improvements make it possible to use the model to represent the evolution of the magnetic field during the entire substorm sequence of growth, expansion, and recovery. The modeled magnetic fields have been compared to satellite observations during three isolated substorms. According to the model results, during the substorm growth phase the thickness of the tail current sheet was gradually decreased while the intensity of the tail current was gradually increased; by the end of the growth phase a thin current sheet of 190-1340 km in half thickness was formed in a narrow region around X similar to -7.5 R-E, with a maximum westward current density of 9-23 nA/m(2). During the substorm expansion phase an eastward current associated with the substorm current wedge started to develop around X similar to -12 R-E, resulting in a collapse of the previously stretched field configuration. At the peak of an intense substorm the net tail current flow became eastward between X = -11 and X = -13 R-E, accompanied by a negative (southward) B-z tailward of -13 R-E.",
keywords = "TAIL CURRENT SHEET, GROWTH-PHASE, CURRENT DISRUPTION, PLASMA SHEET, SYNCHRONOUS ALTITUDE, CURRENT WEDGE, MAGNETOTAIL, MAGNETOSPHERE, MODELING, SUBSTORMS",
author = "G Lu and NA Tsyganenko and ATY Lui and HJ Singer and T Nagai and S Kokubun",
year = "1999",
month = jun,
day = "1",
doi = "10.1029/1999JA900145",
language = "English",
volume = "104",
pages = "12327--12337",
journal = "Journal of Geophysical Research: Biogeosciences",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "A6",

}

RIS

TY - JOUR

T1 - Modeling of time-evolving magnetic fields during substorms

AU - Lu, G

AU - Tsyganenko, NA

AU - Lui, ATY

AU - Singer, HJ

AU - Nagai, T

AU - Kokubun, S

PY - 1999/6/1

Y1 - 1999/6/1

N2 - An attempt has been made to model the dynamics of the magnetospheric magnetic field during substorms by modifying the 1996 version of the data-based model by Tsyganenko [1996]. The modified model incorporates an adjustment to the intensity and thickness of the near-tail current sheet and a contribution from the substorm current wedge. These improvements make it possible to use the model to represent the evolution of the magnetic field during the entire substorm sequence of growth, expansion, and recovery. The modeled magnetic fields have been compared to satellite observations during three isolated substorms. According to the model results, during the substorm growth phase the thickness of the tail current sheet was gradually decreased while the intensity of the tail current was gradually increased; by the end of the growth phase a thin current sheet of 190-1340 km in half thickness was formed in a narrow region around X similar to -7.5 R-E, with a maximum westward current density of 9-23 nA/m(2). During the substorm expansion phase an eastward current associated with the substorm current wedge started to develop around X similar to -12 R-E, resulting in a collapse of the previously stretched field configuration. At the peak of an intense substorm the net tail current flow became eastward between X = -11 and X = -13 R-E, accompanied by a negative (southward) B-z tailward of -13 R-E.

AB - An attempt has been made to model the dynamics of the magnetospheric magnetic field during substorms by modifying the 1996 version of the data-based model by Tsyganenko [1996]. The modified model incorporates an adjustment to the intensity and thickness of the near-tail current sheet and a contribution from the substorm current wedge. These improvements make it possible to use the model to represent the evolution of the magnetic field during the entire substorm sequence of growth, expansion, and recovery. The modeled magnetic fields have been compared to satellite observations during three isolated substorms. According to the model results, during the substorm growth phase the thickness of the tail current sheet was gradually decreased while the intensity of the tail current was gradually increased; by the end of the growth phase a thin current sheet of 190-1340 km in half thickness was formed in a narrow region around X similar to -7.5 R-E, with a maximum westward current density of 9-23 nA/m(2). During the substorm expansion phase an eastward current associated with the substorm current wedge started to develop around X similar to -12 R-E, resulting in a collapse of the previously stretched field configuration. At the peak of an intense substorm the net tail current flow became eastward between X = -11 and X = -13 R-E, accompanied by a negative (southward) B-z tailward of -13 R-E.

KW - TAIL CURRENT SHEET

KW - GROWTH-PHASE

KW - CURRENT DISRUPTION

KW - PLASMA SHEET

KW - SYNCHRONOUS ALTITUDE

KW - CURRENT WEDGE

KW - MAGNETOTAIL

KW - MAGNETOSPHERE

KW - MODELING

KW - SUBSTORMS

U2 - 10.1029/1999JA900145

DO - 10.1029/1999JA900145

M3 - Article

VL - 104

SP - 12327

EP - 12337

JO - Journal of Geophysical Research: Biogeosciences

JF - Journal of Geophysical Research: Biogeosciences

SN - 0148-0227

IS - A6

ER -

ID: 28041114