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Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images. / Ieda, Akimasa; Kauristie, K.; Nishimura, Yukitoshi et al.
In: Earth, Planets and Space, Vol. 70, 73, 04.05.2018.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Ieda, A, Kauristie, K, Nishimura, Y, Miyashita, Y, Frey, H, Juusola, L, Whiter, D, Nosé, M, Fillingim, M, Honary, F, Rogers, NC, Miyoshi, Y, Miura, T, Kawashima, T & Machida, S 2018, 'Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images', Earth, Planets and Space, vol. 70, 73. https://doi.org/10.1186/s40623-018-0843-3

APA

Ieda, A., Kauristie, K., Nishimura, Y., Miyashita, Y., Frey, H., Juusola, L., Whiter, D., Nosé, M., Fillingim, M., Honary, F., Rogers, N. C., Miyoshi, Y., Miura, T., Kawashima, T., & Machida, S. (2018). Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images. Earth, Planets and Space, 70, Article 73. https://doi.org/10.1186/s40623-018-0843-3

Vancouver

Ieda A, Kauristie K, Nishimura Y, Miyashita Y, Frey H, Juusola L et al. Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images. Earth, Planets and Space. 2018 May 4;70:73. doi: 10.1186/s40623-018-0843-3

Author

Ieda, Akimasa ; Kauristie, K. ; Nishimura, Yukitoshi et al. / Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images. In: Earth, Planets and Space. 2018 ; Vol. 70.

Bibtex

@article{f2ab101f806047f8b4133adc75c9ba27,
title = "Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images",
abstract = "Substorm onset has originally been defined as a longitudinally extended sudden auroral brightening (Akasofu initial brightening: AIB) followed a few minutes later by an auroral poleward expansion in ground-based all-sky images (ASIs). In contrast, such clearly marked two-stage development has not been evident in satellite-based global images (GIs). Instead, substorm onsets have been identified as localized sudden brightenings that expand immediately poleward. To resolve these differences, optical substorm onset signatures in GIs and ASIs are compared in this study for a substorm that occurred on December 7, 1999. For this substorm, the Polar satellite ultraviolet global imager was operated with a fixed filter (170 nm) mode, enabling a higher time resolution (37 s) than usual to resolve the possible two-stage development.These data were compared with 20-s-resolution green-line (557.7 nm) ASIs at Muonio in Finland. The ASIs revealed the AIB at 2124:50 UT and the subsequent poleward expansion at 2127:50 UT, whereas the GIs revealed only an onset brightening that started at 2127:49 UT. Thus, the onset in the GIs was delayed relative to the AIB and in fact agreed with the poleward expansion in the ASIs. The fact that the AIB was not evident in the GIs may be attributed to the limited spatial resolution of GIs for thin auroral arc brightenings. The implications of these results for the definition of substorm onset are discussed herein.",
keywords = "substorm, auroral breakup, aurora, SUBSTORM ONSET, global images, all-sky images",
author = "Akimasa Ieda and K. Kauristie and Yukitoshi Nishimura and Yukinaga Miyashita and Harald Frey and L. Juusola and Daniel Whiter and Masahito Nos{\'e} and Matt Fillingim and Farideh Honary and Rogers, {Neil Christopher} and Yoshizumi Miyoshi and Tsubasa Miura and Takahiro Kawashima and Shinobu Machida",
note = "Special Issue: Selected papers from the 13th International Conference on Substorms (ICS-13).; 13th International Conference on Substorms, ICS ; Conference date: 25-09-2017 Through 29-09-2017",
year = "2018",
month = may,
day = "4",
doi = "10.1186/s40623-018-0843-3",
language = "English",
volume = "70",
journal = "Earth, Planets and Space",
issn = "1343-8832",
publisher = "Springer Heidelberg",

}

RIS

TY - JOUR

T1 - Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images

AU - Ieda, Akimasa

AU - Kauristie, K.

AU - Nishimura, Yukitoshi

AU - Miyashita, Yukinaga

AU - Frey, Harald

AU - Juusola, L.

AU - Whiter, Daniel

AU - Nosé, Masahito

AU - Fillingim, Matt

AU - Honary, Farideh

AU - Rogers, Neil Christopher

AU - Miyoshi, Yoshizumi

AU - Miura, Tsubasa

AU - Kawashima, Takahiro

AU - Machida, Shinobu

N1 - Conference code: 13

PY - 2018/5/4

Y1 - 2018/5/4

N2 - Substorm onset has originally been defined as a longitudinally extended sudden auroral brightening (Akasofu initial brightening: AIB) followed a few minutes later by an auroral poleward expansion in ground-based all-sky images (ASIs). In contrast, such clearly marked two-stage development has not been evident in satellite-based global images (GIs). Instead, substorm onsets have been identified as localized sudden brightenings that expand immediately poleward. To resolve these differences, optical substorm onset signatures in GIs and ASIs are compared in this study for a substorm that occurred on December 7, 1999. For this substorm, the Polar satellite ultraviolet global imager was operated with a fixed filter (170 nm) mode, enabling a higher time resolution (37 s) than usual to resolve the possible two-stage development.These data were compared with 20-s-resolution green-line (557.7 nm) ASIs at Muonio in Finland. The ASIs revealed the AIB at 2124:50 UT and the subsequent poleward expansion at 2127:50 UT, whereas the GIs revealed only an onset brightening that started at 2127:49 UT. Thus, the onset in the GIs was delayed relative to the AIB and in fact agreed with the poleward expansion in the ASIs. The fact that the AIB was not evident in the GIs may be attributed to the limited spatial resolution of GIs for thin auroral arc brightenings. The implications of these results for the definition of substorm onset are discussed herein.

AB - Substorm onset has originally been defined as a longitudinally extended sudden auroral brightening (Akasofu initial brightening: AIB) followed a few minutes later by an auroral poleward expansion in ground-based all-sky images (ASIs). In contrast, such clearly marked two-stage development has not been evident in satellite-based global images (GIs). Instead, substorm onsets have been identified as localized sudden brightenings that expand immediately poleward. To resolve these differences, optical substorm onset signatures in GIs and ASIs are compared in this study for a substorm that occurred on December 7, 1999. For this substorm, the Polar satellite ultraviolet global imager was operated with a fixed filter (170 nm) mode, enabling a higher time resolution (37 s) than usual to resolve the possible two-stage development.These data were compared with 20-s-resolution green-line (557.7 nm) ASIs at Muonio in Finland. The ASIs revealed the AIB at 2124:50 UT and the subsequent poleward expansion at 2127:50 UT, whereas the GIs revealed only an onset brightening that started at 2127:49 UT. Thus, the onset in the GIs was delayed relative to the AIB and in fact agreed with the poleward expansion in the ASIs. The fact that the AIB was not evident in the GIs may be attributed to the limited spatial resolution of GIs for thin auroral arc brightenings. The implications of these results for the definition of substorm onset are discussed herein.

KW - substorm

KW - auroral breakup

KW - aurora

KW - SUBSTORM ONSET

KW - global images

KW - all-sky images

U2 - 10.1186/s40623-018-0843-3

DO - 10.1186/s40623-018-0843-3

M3 - Journal article

VL - 70

JO - Earth, Planets and Space

JF - Earth, Planets and Space

SN - 1343-8832

M1 - 73

T2 - 13th International Conference on Substorms

Y2 - 25 September 2017 through 29 September 2017

ER -