Rainbow of the Night: First Direct Observation of a SAR Arc Evolving Into STEVE
Rainbow of the Night: First Direct Observation of a SAR Arc Evolving Into STEVE
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夜晚的彩虹:首次直接观察到 SAR 弧演化为 STEVE
DOI:
10.1029/2022gl098511
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发表时间:
2022
影响因子:
5.2
通讯作者:
Knudsen, D. J.
中科院分区:
文献类型:
--
作者:
Martinis, C.;Griffin, I.;Gallardo‐Lacourt, B.;Wroten, J.;Nishimura, Y.;Baumgardner, J.;Knudsen, D. J.
During the 17 March 2015 geomagnetic storm, citizen scientist observations from Dunedin (45.95°S, 170.32°E), New Zealand, revealed a bright wide red arc known as stable auroral red (SAR) arc evolving into a thin white‐mauve arc, known as Strong Thermal Emission Velocity Enhancement (STEVE). An all‐sky imager at the Mount John Observatory (43.99°S, 170.46°E), 200 km north of Dunedin, detected an extremely bright arc in 630.0 nm, with a peak of ∼6 kR, colocated with the arc measured at Dunedin at an assumed height of 425 km. Swarm satellite data measured plasma parameters that showed strong subauroral ion drift signatures when the SAR arc was observed. These conditions intensified to extremely high values in a thinner channel when STEVE was present. Our results highlight the fast evolution of plasma properties and their effects on optical emissions. Current theories and models are unable to reproduce or explain these observations.
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影响因子:
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DOI:
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发表时间:
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期刊:
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DOI:
10.1002/2015ja021722
发表时间:
2016
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
作者:
M. Mendillo;J. Baumgardner;J. Wroten
通讯作者:
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影响因子:
5.2
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