Characteristics of polar cap aurora

M. Ayukawa; K. Makita; H. Yamagishi; M. Ejiri; T. Sakanoi

doi:10.1016/0021-9169(95)00180-8

Characteristics of polar cap aurora

M. Ayukawa, K. Makita, H. Yamagishi, M. Ejiri, T. Sakanoi

SCI - Planetary Plasma and Atmospheric Research Center (PPARC)

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

3 Citations (Scopus)

Abstract

The characteristics of extremely high-latitude dayside auroras are examined by using auroral TV data obtained at Godhavn, Greenland, and simultaneous DMSP particle data. Two different kinds of aurora are found near the pre-noon sector, namely (1) the polar arc: this aurora is observed during quiet periods and originates from the dayside region. It is related to about 100 eV electron precipitation or less, and (2) the polar corona: this aurora is observed during disturbed periods and the appearance latitute of this aurora is confined within a certain region about 70-80° MLAT. It is related to a few hundred eV electrons. These results suggest that the origin of the polar arc seems to be the plasma mantle or low-latitude boundary layer, and the origin of the polar corona seems to be the low-latitude boundary layer or Boundary Plasma Sheet.

Original language	English
Pages (from-to)	1885-1894
Number of pages	10
Journal	Journal of Atmospheric and Terrestrial Physics
Volume	58
Issue number	16
DOIs	https://doi.org/10.1016/0021-9169(95)00180-8
Publication status	Published - 1996 Jan 1

ASJC Scopus subject areas

Environmental Science(all)
Geophysics
Engineering(all)
Atmospheric Science
Earth and Planetary Sciences(all)

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10.1016/0021-9169(95)00180-8

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title = "Characteristics of polar cap aurora",

abstract = "The characteristics of extremely high-latitude dayside auroras are examined by using auroral TV data obtained at Godhavn, Greenland, and simultaneous DMSP particle data. Two different kinds of aurora are found near the pre-noon sector, namely (1) the polar arc: this aurora is observed during quiet periods and originates from the dayside region. It is related to about 100 eV electron precipitation or less, and (2) the polar corona: this aurora is observed during disturbed periods and the appearance latitute of this aurora is confined within a certain region about 70-80° MLAT. It is related to a few hundred eV electrons. These results suggest that the origin of the polar arc seems to be the plasma mantle or low-latitude boundary layer, and the origin of the polar corona seems to be the low-latitude boundary layer or Boundary Plasma Sheet.",

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T1 - Characteristics of polar cap aurora

AU - Ayukawa, M.

AU - Makita, K.

AU - Yamagishi, H.

AU - Ejiri, M.

AU - Sakanoi, T.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - The characteristics of extremely high-latitude dayside auroras are examined by using auroral TV data obtained at Godhavn, Greenland, and simultaneous DMSP particle data. Two different kinds of aurora are found near the pre-noon sector, namely (1) the polar arc: this aurora is observed during quiet periods and originates from the dayside region. It is related to about 100 eV electron precipitation or less, and (2) the polar corona: this aurora is observed during disturbed periods and the appearance latitute of this aurora is confined within a certain region about 70-80° MLAT. It is related to a few hundred eV electrons. These results suggest that the origin of the polar arc seems to be the plasma mantle or low-latitude boundary layer, and the origin of the polar corona seems to be the low-latitude boundary layer or Boundary Plasma Sheet.

AB - The characteristics of extremely high-latitude dayside auroras are examined by using auroral TV data obtained at Godhavn, Greenland, and simultaneous DMSP particle data. Two different kinds of aurora are found near the pre-noon sector, namely (1) the polar arc: this aurora is observed during quiet periods and originates from the dayside region. It is related to about 100 eV electron precipitation or less, and (2) the polar corona: this aurora is observed during disturbed periods and the appearance latitute of this aurora is confined within a certain region about 70-80° MLAT. It is related to a few hundred eV electrons. These results suggest that the origin of the polar arc seems to be the plasma mantle or low-latitude boundary layer, and the origin of the polar corona seems to be the low-latitude boundary layer or Boundary Plasma Sheet.

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Characteristics of polar cap aurora

Abstract

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