Time evolution of high-altitude plasma bubbles imaged at geomagnetic conjugate points

被引：52

作者：

Shiokawa, K ^{[1
]}

Otsuka, Y

Ogawa, T

Wilkinson, P

机构：

[1] Nagoya Univ, Solar Terr Environm Lab, Toyokawa 4428507, Japan

[2] IPS, Radio & Space Serv, Haymarket, NSW 1240, Australia

来源：

ANNALES GEOPHYSICAE | 2004年 / 22卷 / 09期

关键词：

ionosphere; equatorial ionosphere; ionospheric irregularities; atmospheric composition and structure; air-glow and aurora;

D O I：

10.5194/angeo-22-3137-2004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Temporal and spatial evolution of two high-altitude plasma bubbles (evening and midnight) was observed on 4 April 2002, at geomagnetic conjugate points at Sata, Japan (magnetic latitude 24degrees N), and Darwin, Australia (magnetic latitude 22degrees S), using two 630-nm airglow imagers. The apex height of the bubbles reached similar to1500km. The upward velocity of the evolution was faster in the evening (similar to170m/s at 20:00-21:00 LT) than around midnight (similar to28 m/s at 23:00-00:00 LT). Bifurcating features of the bubbles into a smaller scale size of similar to50 km were clearly seen for both the evening and midnight bubbles, showing fairly good conjugacy between the Northern and Southern Hemispheres.

引用

页码：3137 / 3143

页数：7

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