Two-component auroras

J. H. Shue; P. T. Newell; K. Liou; C. I. Meng; Y. Kamide; R. P. Lepping

doi:10.1029/2002gl014657

Two-component auroras

J. H. Shue, P. T. Newell, K. Liou, C. I. Meng, Y. Kamide, R. P. Lepping

Department of Space Science and Engineering

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

15 Scopus citations

Abstract

By examining Polar Ultraviolet Imager auroral images at the 160-180 nm N₂ Lyman-Birge-Hopfield emission band, we find that the auroral dynamics associated with substorms shows a two-component feature. An auroral feature, which is called the two-cell aurora, is associated with the increased magnetospheric convection in response to a southward interplanetary magnetic field. A substorm expansion may then occur, adding an additional aurora in the midnight sector. As the substorm continuously increases its strength, the substorm aurora connects with the two-cell aurora, forming a well-defined crescent-shape aurora. It is also found that the occurrence rate of the two-cell aurora depends on universal time.

Original language	English
Pages (from-to)	17-1-17-4
Journal	Geophysical Research Letters
Volume	29
Issue number	10
DOIs	https://doi.org/10.1029/2002gl014657
State	Published - 15 May 2002

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abstract = "By examining Polar Ultraviolet Imager auroral images at the 160-180 nm N2 Lyman-Birge-Hopfield emission band, we find that the auroral dynamics associated with substorms shows a two-component feature. An auroral feature, which is called the two-cell aurora, is associated with the increased magnetospheric convection in response to a southward interplanetary magnetic field. A substorm expansion may then occur, adding an additional aurora in the midnight sector. As the substorm continuously increases its strength, the substorm aurora connects with the two-cell aurora, forming a well-defined crescent-shape aurora. It is also found that the occurrence rate of the two-cell aurora depends on universal time.",

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T1 - Two-component auroras

AU - Shue, J. H.

AU - Newell, P. T.

AU - Liou, K.

AU - Meng, C. I.

AU - Kamide, Y.

AU - Lepping, R. P.

PY - 2002/5/15

Y1 - 2002/5/15

N2 - By examining Polar Ultraviolet Imager auroral images at the 160-180 nm N2 Lyman-Birge-Hopfield emission band, we find that the auroral dynamics associated with substorms shows a two-component feature. An auroral feature, which is called the two-cell aurora, is associated with the increased magnetospheric convection in response to a southward interplanetary magnetic field. A substorm expansion may then occur, adding an additional aurora in the midnight sector. As the substorm continuously increases its strength, the substorm aurora connects with the two-cell aurora, forming a well-defined crescent-shape aurora. It is also found that the occurrence rate of the two-cell aurora depends on universal time.

AB - By examining Polar Ultraviolet Imager auroral images at the 160-180 nm N2 Lyman-Birge-Hopfield emission band, we find that the auroral dynamics associated with substorms shows a two-component feature. An auroral feature, which is called the two-cell aurora, is associated with the increased magnetospheric convection in response to a southward interplanetary magnetic field. A substorm expansion may then occur, adding an additional aurora in the midnight sector. As the substorm continuously increases its strength, the substorm aurora connects with the two-cell aurora, forming a well-defined crescent-shape aurora. It is also found that the occurrence rate of the two-cell aurora depends on universal time.

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Two-component auroras

Abstract

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